Modifying a signal by adjusting the phase and amplitude of the signal

• US 20060267983A1
• Filed: 05/24/2005
• Published: 11/30/2006
• Est. Priority Date: 05/24/2005
• Status: Abandoned Application

• Current Assignee: Google Inc. (Alphabet Inc.)
• Original Assignee: Magnolia Broadband Incorporated
• Inventors: Karmi, Yair, Harel, Haim
• Application Number:
  US11/136,017
• Publication Number:
  US 20060267983A1
• Time in Patent Office: Days
• US Class Current: 345/440
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]

Abstract

Modifying a signal includes facilitating transmission of the signal from a modifying communication device to a feedback communication device. Power indicators reflecting the power of the signal as received by the feedback communication device are received. Previous power indicators reflect the power of the signal adjusted according to a previous modification, and current power indicators reflect the power of the signal adjusted according to a current modification. A previous power descriptor value is estimated from the previous power indicators, and a current power descriptor value is estimated from the current power indicators. A modification increment is determined in accordance with the previous power descriptor value and the current power descriptor value. A next modification is calculated from the current modification and the modification increment, and a phase and an amplitude of the signal are adjusted in accordance with the next modification.

Claims

1. A method for modifying a signal, comprising:

facilitating transmission of a signal from a modifying communication device to a feedback communication device; and

repeating the following for a plurality of iterations;

receiving a plurality of power indicators, a power indicator reflecting the power of the signal as received by the feedback communication device, the plurality of power indicators comprising;

one or more previous power indicators reflecting the power of the signal adjusted according to a previous modification; and

one or more current power indicators reflecting the power of the signal adjusted according to a current modification;

estimating a previous power descriptor value from the one or more previous power indicators;

estimating a current power descriptor value from the one or more current power indicators;

determining a modification increment in accordance with the previous power descriptor value and the current power descriptor value;

calculating a next modification from the current modification and the modification increment; and

adjusting a phase and an amplitude of the signal in accordance with the next modification.

2. The method of claim 1, wherein receiving the plurality of power indicators further comprises:

receiving a control signal comprising a plurality of windows comprising;

one or more previous windows, a previous window communicating the one or more previous power indicators; and

a current window communicating the one or more current power indicators.

3. The method of claim 1, wherein adjusting the phase and the amplitude of the signal in accordance with the next modification further comprises:

changing a relative power between a first antenna and a second antenna of the modifying communication device while maintaining a total power of the first antenna and the second antenna.

4. The method of claim 1, wherein repeating the following for the plurality of iterations further comprises:

adjusting the phase and the amplitude during alternate iterations.

5. The method of claim 1, wherein repeating the following for the plurality of iterations further comprises:

adjusting the phase during a first number of iterations of the plurality of iterations; and

adjusting the amplitude during a second number of iterations of the plurality of iterations, the first number greater then the second number.

6. The method of claim 1, wherein:

the previous power descriptor value comprises a previous power trend value; and

the current power descriptor value comprises a current power trend value.

7. The method of claim 1, wherein:

the previous power descriptor value comprises a previous power value; and

the current power descriptor value comprises a current power value.

8. A system for modifying a signal, comprising:

an interface operable to receive and send a plurality of signals, the plurality of signals to be transmitted from a modifying communication device to a feedback communication device; and

control logic coupled to the interface and operable to;

facilitate transmission of a signal from the modifying communication device to the feedback communication device; and

repeat the following for a plurality of iterations;

receive a plurality of power indicators, a power indicator reflecting the power of the signal as received by the feedback communication device, the plurality of power indicators comprising;

one or more previous power indicators reflecting the power of the signal adjusted according to a previous modification; and

one or more current power indicators reflecting the power of the signal adjusted according to a current modification;

estimate a previous power descriptor value from the one or more previous power indicators;

estimate a current power descriptor value from the one or more current power indicators;

determine a modification increment in accordance with the previous power descriptor value and the current power descriptor value;

calculate a next modification from the current modification and the modification increment; and

adjust a phase and an amplitude of the signal in accordance with the next modification.

9. The system of claim 8, the control logic further operable to receive the plurality of power indicators by:

receiving a control signal comprising a plurality of windows comprising;

one or more previous windows, a previous window communicating the one or more previous power indicators; and

a current window communicating the one or more current power indicators.

10. The system of claim 8, the control logic further operable to adjust the phase and the amplitude of the signal in accordance with the next modification by:

changing a relative power between a first antenna and a second antenna of the modifying communication device while maintaining a total power of the first antenna and the second antenna.

11. The system of claim 8, the control logic further operable to repeat the following for the plurality of iterations by:

adjusting the phase and the amplitude during alternate iterations.

12. The system of claim 8, the control logic further operable to repeat the following for the plurality of iterations by:

adjusting the phase during a first number of iterations of the plurality of iterations; and

adjusting the amplitude during a second number of iterations of the plurality of iterations, the first number greater then the second number.

13. The system of claim 8, wherein:

the previous power descriptor value comprises a previous power trend value; and

the current power descriptor value comprises a current power trend value.

14. The system of claim 8, wherein:

the previous power descriptor value comprises a previous power value; and

the current power descriptor value comprises a current power value.

15. Logic for modifying a signal, the logic embodied in a computer-readable medium and operable to:

facilitate transmission of a signal from a modifying communication device to a feedback communication device; and

repeat the following for a plurality of iterations;

receive a plurality of power indicators, a power indicator reflecting the power of the signal as received by the feedback communication device, the plurality of power indicators comprising;

one or more previous power indicators reflecting the power of the signal adjusted according to a previous modification; and

one or more current power indicators reflecting the power of the signal adjusted according to a current modification;

estimate a previous power descriptor value from the one or more previous power indicators;

estimate a current power descriptor value from the one or more current power indicators;

determine a modification increment in accordance with the previous power descriptor value and the current power descriptor value;

calculate a next modification from the current modification and the modification increment; and

adjust a phase and an amplitude of the signal in accordance with the next modification.

16. The logic of claim 15, further operable to receive the plurality of power indicators by:

receiving a control signal comprising a plurality of windows comprising;

one or more previous windows, a previous window communicating the one or more previous power indicators; and

a current window communicating the one or more current power indicators.

17. The logic of claim 15, further operable to adjust the phase and the amplitude of the signal in accordance with the next modification by:

changing a relative power between a first antenna and a second antenna of the modifying communication device while maintaining a total power of the first antenna and the second antenna.

18. The logic of claim 15, further operable to repeat the following for the plurality of iterations by:

adjusting the phase and the amplitude during alternate iterations.

19. The logic of claim 15, further operable to repeat the following for the plurality of iterations by:

adjusting the phase during a first number of iterations of the plurality of iterations; and

adjusting the amplitude during a second number of iterations of the plurality of iterations, the first number greater then the second number.

20. The logic of claim 15, wherein:

the previous power descriptor value comprises a previous power trend value; and

the current power descriptor value comprises a current power trend value.

21. The logic of claim 15, wherein:

the previous power descriptor value comprises a previous power value; and

the current power descriptor value comprises a current power value.

22. A system for modifying a signal, comprising:

means for facilitating transmission of a signal from a modifying communication device to a feedback communication device; and

means for repeating the following for a plurality of iterations;

receiving a plurality of power indicators, a power indicator reflecting the power of the signal as received by the feedback communication device, the plurality of power indicators comprising;

one or more previous power indicators reflecting the power of the signal adjusted according to a previous modification; and

one or more current power indicators reflecting the power of the signal adjusted according to a current modification;

estimating a previous power descriptor value from the one or more previous power indicators;

estimating a current power descriptor value from the one or more current power indicators;

determining a modification increment in accordance with the previous power descriptor value and the current power descriptor value;

calculating a next modification from the current modification and the modification increment; and

adjusting a phase and an amplitude of the signal in accordance with the next modification.

23. A method for modifying a signal, comprising:

facilitating transmission of a signal from a modifying communication device to a feedback communication device; and

repeating the following for a plurality of iterations;

receiving a plurality of power indicators, a power indicator reflecting the power of the signal as received by the feedback communication device, the plurality of power indicators comprising;

one or more previous power indicators reflecting the power of the signal adjusted according to a previous modification; and

one or more current power indicators reflecting the power of the signal adjusted according to a current modification, the plurality of power indicators received by;

receiving a control signal comprising a plurality of windows comprising;

one or more previous windows, a previous window communicating the one or more previous power indicators; and

a current window communicating the one or more current power indicators;

estimating a previous power descriptor value from the one or more previous power indicators, the previous power descriptor value comprising at least one of a previous power trend value and a previous power value;

estimating a current power descriptor value from the one or more current power indicators, the current power descriptor value comprising at least one of a current power trend value and a current power value;

determining a modification increment in accordance with the previous power descriptor value and the current power descriptor value;

calculating a next modification from the current modification and the modification increment; and

adjusting a phase and an amplitude of the signal in accordance with the next modification by;

changing a relative power between a first antenna and a second antenna of the modifying communication device while maintaining a total power of the first antenna and the second antenna, the plurality of iterations repeated by;

adjusting the phase and the amplitude during alternate iterations;

adjusting the phase during a first number of iterations of the plurality of iterations; and

adjusting the amplitude during a second number of iterations of the plurality of iterations, the first number greater then the second number.