Linear amplifier control

• US 5,386,198 A
• Filed: 01/28/1993
• Issued: 01/31/1995
• Est. Priority Date: 01/28/1993
• Status: Expired due to Term

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Ripstrand, Krister I., Nygren, Thorsten
• Primary Examiner(s): Mullins, James B.
• Application Number:
  US08/010,274
• Time in Patent Office: 733 Days
• Field of Search: 330/52, 330/149, 330/151, 328/163
• US Class Current: 330/52
• CPC Class Codes: H03F 1/3235 using a pilot signal
• CPC Class Codes: H03F 2201/3212 Using a control circuit to adjust amplitude and phase of a signal in a signal path
• CPC Class Codes: H03F 2201/3218 the main amplifier or error amplifier being a feedforward amplifier

Abstract

A method and apparatus for controlling a feed-forward compensated power amplifier system is disclosed which uses a spread spectrum technique to cover a control signal or signals and injects a composite signal at a suitable point into the feed-forward amplifier system to reduce distortion. The amount of bandwidth spread is governed by the amount of processing gain needed in the remapping process and the needed time response of the system. Control signals after remapping of the spread spectrum at the output of the system are correlated in a match filter correlator and the result is used to control, in either polar or cartesian coordinates, the injection, in anti-phase, of the extracted distortion into the feed forward amplifier output.

Claims

1. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining an input signal and said frequency spreaded control signal;

a first sampling means including an input port for receiving said combined signals from said first combining means and first and second output ports;

an amplifying means coupled to said first output port of said first sampling means for amplifying said combined signal received from said first sampling means;

a first delay element coupled to said second output port of said first signal sampling means for delaying said combined signal received from said first signal sampling means to produce a delayed combined signal;

first amplitude and phase control means coupled to said first delay means for controlling the relative amplitude and phase of said delayed combined signal;

a second combining means for combining said amplified signal from said amplifying means and an adjusted signal from said amplitude and phase control means to produce an output signal;

a second sampling means including a first input port for receiving said output signal and first and second output ports;

a remapping means coupled to said first output port of said second sampling means for remapping the output signal from said second sampling means with a spread sequence which has been delayed by a second delay means;

a third delay means for receiving said control signals; and

a matched filter correlator means for correlating said delayed output signal received from said third delay means and said remapped signal received from said remapping means for controlling the first amplitude and phase control means.

2. A linear amplifier controller for reducing distortion according to claim 1, wherein said signal generator comprises:

a pseudo noise sequence generator which is driven by a first clock to produce a first signal;

a modulator which modulates a carrier signal with said first signal to produce a carrier modulated signal;

a spreading sequence generator which is driven by a second clock to produce a spreading sequence; and

a multiplier for multiplying said carrier modulated signal with said spreading sequence to produce a composite signal.

3. A linear amplifier controller for reducing distortion according to claim 2, wherein said spreading sequence generator and said pseudo noise sequence generator are of a maximum length type.

4. A linear amplifier controller for reducing distortion according to claim 2, wherein said modulator is a MSK modulator.

5. A linear amplifier controller for reducing distortion according to claim 2, wherein said modulator is an OQPSK modulator.

6. A linear amplifier controller for reducing distortion according to claim 1, wherein the delay introduced by the first, second and third delay means is equal to the delay introduced by the amplifying means.

7. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal; and

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means.

8. A linear amplifier controller for reducing distortion according to claim 7, wherein said signal generator comprises:

a pseudo noise sequence generator which is driven by a first clock to produce a first signal;

a modulator which modulates a carrier signal with said first signal to produce a carrier modulated signal;

a spreading sequence generator which is driven by a second clock to produce a spreading sequence; and

a multiplier for multiplying said carrier modulated signal with said spreading sequence to produce a composite signal.

9. A linear amplifier controller for reducing distortion according to claim 8, wherein said spreading sequence generator and said pseudo noise sequence generator are of a maximum length type.

10. A linear amplifier controller for reducing distortion according to claim 8, wherein said modulator is a MSK modulator.

11. A linear amplifier controller for reducing distortion according to claim 8, wherein said modulator is an OQPSK modulator.

12. A linear amplifier controller for reducing distortion according to claim 7, wherein said first delay means introduces a delay which is equal to the delay introduced by the first amplifying means.

13. A linear amplifier controller for reducing distortion according to claim 7, wherein said second, third and fourth delay means introduce a delay which is equal to the delay introduced by the second amplifying means.

14. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal and first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said third combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means; and

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output port of said eighth sampling means to control said third amplitude and phase control means.

15. A linear amplifier controller for reducing distortion according to claim 14, the delay introduced by the second, third, fourth and fifth delay means is equal to the delay introduced by the second amplifying means.

16. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapping signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal said first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said third combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means;

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output pert of said eighth sampling means to control said third amplitude and phase control means;

a second spread spectrum signal generating means for frequency spreading said control signal;

a fifth combining means coupled between said second amplitude and phase control means and said second amplifying means for combining said frequency spreaded control signal with said second combined signal from said second amplitude and phase control means and supplying a fifth combined signal to said second amplifying means;

a sixth delay means coupled to said first output port of said fifth sampling means for delaying said third combined signal;

a fourth amplitude and phase control means coupled to said second output port of said ninth sampling means for adjusting the amplitude and phase of said fourth combined signal;

a third amplifying means coupled to said fourth amplitude and control means for amplifying said adjusted fourth combined signal received from said fourth amplitude and phase control means;

a sixth combining means for combining said delayed third combined signal received from said sixth delay element and said amplified signal from said third amplifying means to produce a sixth combined signal;

a tenth sampling means including an input port for receiving said sixth combined signal from said sixth combining means and first and second output ports;

a second remapping means coupled to said second output port of said tenth sampling means for remapping the output signal from said tenth sampling means with a second spreading sequence which has been delayed by a seventh delay means;

a eighth delay means for receiving said control signal; and

a fourth loop control means for correlating said delayed input signal received from said eighth delay means with said remapped signal from said second remapping means to control said fourth amplitude and phase control means.

17. A linear amplifier controller for reducing distortion according to claim 16, wherein said second signal generating means comprises:

a pseudo noise sequence generator which is driven by a first clock to produce a first signal;

a modulator which modulates a carrier signal with said first signal to produce a carrier modulated signal;

a second spreading sequence generator which is driven by a second clock to produce a spreading sequence; and

a multiplier for multiplying said carrier modulated signal with said spreading sequence to produce a composite signal.

18. A linear amplifier controller for reducing distortion according to claim 17, wherein said spreading sequence generator and said pseudo noise sequence generator are of a maximum length type.

19. A linear amplifier controller for reducing distortion according to claim 17, wherein said modulator is a MSK modulator.

20. A linear amplifier controller for reducing distortion according to claim 17, wherein said modulator is an OQPSK modulator.

21. A method for controlling a feed forward compensated power amplifier system, comprising the steps of:

generating a spread spectrum composite signal from control signals using spread spectrum techniques;

injecting the frequency spread spectrum composite signals into the feed forward amplifier system where the distortion originates;

remapping the spread spectrum composite signal at the output of the amplifier system;

correlating the remapped signal with said control signals;

controlling the cancellation of the frequency spread control signals and the distortion introduced by the amplifier at the output of the feed forward amplifier system.

22. A method for controlling a feed forward compensated power amplifier system according to claim 21, wherein said step of injecting further comprises injecting said frequency spread control signals into the amplifier system at any point along a path from where the distortion originates.

23. A method for controlling a feed forward compensated power amplifier system according to claim 21, wherein in aid step of generating the spread spectrum composite signal a frequency of said control signals is arbitrary.

24. A method for controlling a feed forward compensated power amplifier system according to claim 23, further comprising the step of:

calculating best frequency of the control signals in the system using received information concerning transmission channels.

25. A method for controlling a feed forward compensated power amplifier system according to claim 21, further comprising the step of:

calculating best frequency of the control signals in the system using received information on where to minimize the distortion.

26. A method for controlling a feed forward compensated power amplifier system according to claim 21, further comprising the step of:

interchanging a power of the control signals integration time after remapping and the spread spectrum to increase the systems flexibility regarding settling time.

27. A method for controlling a feed forward compensated power amplifier system according to claim 21, further comprising the step of:

arbitrarily modulating the control signals to increase the tolerance against interfering signals present at the frequencies of the control signals.

28. A method for controlling a feed forward compensated power amplifier system according to claim 21, wherein in said step of generating a spread spectrum composite signal governing the spread spectrum by the amount of processing gain needed in the remapping process.

29. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining an output signal from said first amplitude and phase control means and said frequency spreaded control signal from said signal generating means to produce a first combined signal;

a first amplifying means coupled to said first combining means for amplifying said first combined signal;

a second sampling means including an input port for receiving said amplified first combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal; and

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means.

30. A linear amplifier controller for reducing distortion according to claim 29, wherein said signal generating means comprises:

a pseudo noise sequence generator which is driven by a first clock to produce a first signal;

a modulator which modulates a carrier signal with said first signal to produce a carrier modulated signal;

a spreading sequence generator which is driven by a second clock to produce a spreading sequence; and

a multiplier for multiplying said carrier modulated signal with said spreading sequence to produce a composite signal.

31. A linear amplifier controller for reducing distortion according to claim 29, wherein said spreading sequence generator and said pseudo noise sequence generator are of a maximum length type.

32. A linear amplifier controller for reducing distortion according to claim 29, wherein said modulator is a MSK modulator.

33. A linear amplifier controller for reducing distortion according to claim 29, wherein said modulator is an OQPSK modulator.

34. A linear amplifier controller for reducing distortion according to claim 29, wherein the delay introduced by the second, third and fourth delay means is equal to the delay introduced by the first and second amplifying means.

35. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining a signal from said first sampling means and said frequency spreaded control signal from said signal generating means to produce a first combined signal;

a first amplitude and phase control means coupled to said first combining means for controlling the amplitude and phase of said first combined signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said combined signal received from said first amplitude and phase control means;

a second sampling means including an input port for receiving said amplified combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal; and

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means.

36. A linear amplifier controller for reducing distortion according to claim 35, wherein said signal generating means comprises:

a pseudo noise sequence generator which is driven by a first clock to produce a first signal;

a modulator which modulates a carrier signal with said first signal to produce a carrier modulated signal;

a spreading sequence generator which is driven by a second clock to produce a spreading sequence; and

a multiplier for multiplying said carrier modulated signal with said spreading sequence to produce a composite signal.

37. A linear amplifier controller for reducing distortion according to claim 35, wherein said spreading sequence generator and said pseudo noise sequence generator are of a maximum length type.

38. A linear amplifier controller for reducing distortion according to claim 35, wherein said modulator is a MSK modulator.

39. A linear amplifier controller for reducing distortion according to claim 35, wherein said modulator is an OQPSK modulator.

40. A linear amplifier controller for reducing distortion according to claim 35, wherein the delay introduced by said second, third and fourth delay means is equal to the delay introduced by the first and second amplifying means.

41. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving a fifth combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal and first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said fifth combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means;

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output port of said eighth sampling means to control said third amplitude and phase control means;

a second spread spectrum signal generating means for frequency spreading said control signal;

a fifth combining means coupled between said output of said third combining means and the input of said fifth sampling means for combining said frequency spreaded control signal with said third combined signal and supplying said fifth combined signal to said fifth sampling means;

a sixth delay means coupled to said first output port of said fifth sampling means for delaying said fifth combined signal;

a fourth amplitude and phase control means coupled to said second output port of said ninth sampling means for adjusting the amplitude and phase of said fourth combined signal;

a third amplifying means coupled to said fourth amplitude and control means for amplifying said adjusted fourth combined signal received from said fourth amplitude and phase control means;

a sixth combining means for combining said delayed fifth combined signal received from said sixth delay element and said amplified signal from said third amplifying means to produce a sixth combined signal;

a tenth sampling means including an input port for receiving said sixth combined signal from said sixth combining means and first and second output ports;

a second remapping means coupled to said second output port of said tenth sampling means for remapping the output signal from said tenth sampling means with a second spreading sequence which has been delayed by a seventh delay means;

a eighth delay means for receiving said control signal; and

a fourth loop control means for correlating said delayed input signal received from said eighth delay means with said remapped signal from said second remapping means to control said fourth amplitude and phase control means.

42. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said second combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and a fifth combined signal from a fifth combining means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal and first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said third combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means;

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output port of said eighth sampling means to control said third amplitude and phase control means;

a second spread spectrum signal generating means for frequency spreading said control signal;

said fifth combining means coupled between said output of said second amplifying means and said input of said third combining means for combining said frequency spreaded control signal with said amplified second combined signal and supplying said fifth combined signal to said third combining means;

a sixth delay means coupled to said first output port of said fifth sampling means/for delaying said third combined signal;

a fourth amplitude and phase control means coupled to said second output port of said ninth sampling means for adjusting the amplitude and phase of said fourth combined signal;

a third amplifying means coupled to said fourth amplitude and control means for amplifying said adjusted fourth combined signal received from said fourth amplitude and phase control means;

a sixth combining means for combining said delayed third combined signal received from said sixth delay element and said amplified signal from said third amplifying means to produce a sixth combined signal;

a tenth sampling means including an input port for receiving said sixth combined signal from said sixth combining means and first and second output ports;

a second remapping means coupled to said second output port of said tenth sampling means for remapping the output signal from said tenth sampling means with a second spreading sequence which has been delayed by a seventh delay means;

a eighth delay means for receiving said control signal; and

a fourth loop control means for correlating said delayed input signal received from said eighth delay means with said remapped signal from said second remapping means to control said fourth amplitude and phase control means.

43. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving said second combined signal from said second combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said second combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to a fifth combining means for controlling the amplitude and phase of a fifth combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said fifth combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal and first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said third combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means;

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output port of said eighth sampling means to control said third amplitude and phase control means;

a second spread spectrum signal generating means for frequency spreading said control signal;

said fifth combining means coupled between said first output port of said fourth sampling means and the input of said second amplitude and phase control means for combining said frequency spreaded control signal with a signal from said fourth sampling means and supplying said fifth combined signal to said second amplitude and phase control means;

a sixth delay means coupled to said first output port of said fifth sampling means for delaying said third combined signal;

a fourth amplitude and phase control means coupled to said second output port of said ninth sampling means for adjusting the amplitude and phase of said fourth combined signal;

a third amplifying means coupled to said fourth amplitude and control means for amplifying said adjusted fourth combined signal received from said fourth amplitude and phase control means;

a sixth combining means for combining said delayed third combined signal received from said sixth delay element and said amplified signal from said third amplifying means to produce a sixth combined signal;

a tenth sampling means including an input port for receiving said sixth combined signal from said sixth combining means and first and second output ports;

a second remapping means coupled to said second output port of said tenth sampling means for remapping the output signal from said tenth sampling means with a second spreading sequence which has been delayed by a seventh delay means;

a eighth delay means for receiving said control signal; and

a fourth loop control means for correlating said delayed input signal received from said eighth delay means with said remapped signal from said second remapping means to control said fourth amplitude and phase control means.

44. A linear amplifier controller for reducing distortion in a feed forward amplifier system, comprising:

a first sampling means including an input port for receiving an input signal and first and second output ports;

a first amplitude and phase control means coupled to said first output port of said first sampling means for controlling the amplitude and phase of said input signal;

a first amplifying means coupled to said first amplitude and phase control means for amplifying said input signal received from said first amplitude and phase control means;

a spread spectrum signal generating means for frequency spreading a control signal;

a first combining means for combining said amplified signal from said amplifying means and said frequency spreaded control signal from said signal generator to produce a first combined signal;

a second sampling means including an input port for receiving said combined signal and first and second output ports;

a first delay means coupled to said first sampling means for delaying said input signal;

a third sampling means including a first input port for receiving said first delayed input signal from said delay means and first and second output ports;

a second combining means for combining said delayed input signal from said first output port of said third sampling means and said first combined signal from said second sampling means to produce a second combined signal;

a fourth sampling means including an input port for receiving a fifth combined signal from a fifth combining means and first and second output ports;

a first loop controller which correlates said time delayed input signal from said second output port of said third sampling means and said fifth combined signal from said second output port of said fourth sampling means to control the first amplitude and phase control means;

a second amplitude and phase control means coupled to said first output port of said fourth sampling means for controlling the amplitude and phase of said fifth combined signal;

a second amplifying means coupled to said second amplitude and phase control means for amplifying said second combined signal received from said second amplitude and phase control means;

a second delay means coupled to said second output port of said second sampling means for delaying said first combined signal;

a third combining means for combining said first combined signal received from said second delay means and said amplified signal from said second amplifying means to produce a third combined signal;

a fifth sampling means including an input port for receiving said third combined signal and first and second output ports;

a remapping means coupled to said first output port of said fifth sampling means for remapping the output signal from said fifth sampling means with a spreading sequence which has been delayed by a third delay means;

a fourth delay means for receiving said control signal;

a second loop control means for correlating said delayed control signal received from said fourth delay means with said remapped signal from said remapping means to control the second amplitude and phase control means;

a sixth sampling means coupled between the output of said third sampling means and the input of said second combining means including an input port for receiving said delayed input signal and first and second output ports;

a fifth delay means coupled to said second output port of said sixth sampling means to further delay the delayed input signal;

a seventh sampling means including an input port for receiving said delayed signal from said fifth delay means and first and second output ports;

a third amplitude and phase control means coupled to said first output of said seventh sampling means for controlling the amplitude and phase of said delayed input signal;

a fourth combining means for combining the signal from said third amplitude and phase control means and said third combined signal from the first output port of said fifth sampling means to produce a fourth combined signal;

an eighth sampling means including an input port for receiving said fourth combined signal from said fourth combining means and first and second output ports;

a ninth sampling means including an input port for receiving said fourth combined signal from the first output port of said eighth sampling means and first and second output ports, wherein the first output port is connected to said remapping means;

a third loop control means for correlating said delayed input signal from said second output port of said seventh sampling means and said fourth combined signal from said second output port of said eighth sampling means to control said third amplitude and phase control means;

a second spread spectrum signal generating means for frequency spreading said control signal;

said fifth combining means coupled between said output of said second combining means and said input of said fourth sampling means for combining said frequency spreaded control signal with said second combined signal and supplying said fifth combined signal to said input of said fourth sampling means;

a sixth delay means coupled to said first output port of said fifth sampling means for delaying said third combined signal;

a fourth amplitude and phase control means coupled to said second output port of said ninth sampling means for adjusting the amplitude and phase of said fourth combined signal;

a third amplifying means coupled to said fourth amplitude and control means for amplifying said adjusted fourth combined signal received from said fourth amplitude and phase control means;

a sixth combining means for combining said delayed third combined signal received from said sixth delay element and said amplified signal from said third amplifying means to produce a sixth combined signal;

a tenth sampling means including an input port for receiving said sixth combined signal from said sixth combining means and first and second output ports;

a second remapping means coupled to said second output port of said tenth sampling means for remapping the output signal from said tenth sampling means with a second spreading sequence which has been delayed by a seventh delay means;

a eighth delay means for receiving said control signal; and

a fourth loop control means for correlating said delayed input signal received from said eighth delay means with said remapped signal from said second remapping means to control said fourth amplitude and phase control means.