Frequency plan

• US 6,671,500 B2
• Filed: 03/30/2001
• Issued: 12/30/2003
• Est. Priority Date: 03/30/2001
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Skyworks Solutions Incorporated
• Inventors: Zhang, Andrew, Molnar, Alyosha C., Magoon, Rahul, Damgaard, Morten, Domino, William J.
• Primary Examiner(s): Maung, Nay
• Assistant Examiner(s): SOBUTKA, PHILIP
• Application Number:
  US09/823,680
• Publication Number:
  US 20020183030A1
• Time in Patent Office: 1,005 Days
• Field of Search: 455/258, 455/259, 455/260, 455/264, 455/265, 455/266, 455/315, 455/316, 455/318, 455/552, 455/76, 455/84, 455/85, 455/86, 455/87, 455/112, 455/113, 455/123, 455/125, 455/91, 455/118, 713/501
• US Class Current: 455/118
• CPC Class Codes: H03D 7/163 the local oscillations of at least two of the frequency changers being derived from a single oscillator
• CPC Class Codes: H03L 7/185 using a mixer in the loop H03L7/187 - H03L7/195 take precedence
• CPC Class Codes: H03L 7/1974 for fractional frequency division
• CPC Class Codes: H04B 1/403 using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency

Abstract

A system is disclosed for transmitting and receiving signals. The system includes the use of a frequency plan table a system for creating the frequency plan table. The frequency plan table relates carrier frequency channels to the operation of a synthesizer and a plurality of programmable frequency dividers in a locked loop. In a transmitter, a first programmable frequency divider accepts a reference signal and produces a comparison signal. A mixer accepts the reference signal and a transmission signal and produces a loop signal. A second programmable frequency divider accepts the loop signal and produces a loop signal having a divided intermediate frequency signal. A phase detector compares the comparison signal and the loop signal having a divided intermediate frequency and produces an output that controls a variable controlled oscillator. The variable controlled oscillator produces a modulated transmission signal.

Claims

1. A wireless communication device, comprising:

(a) a first frequency divider,

the first frequency divider being configured to accept a reference signals, having a local oscillation frequency, and

the first frequency divider being configured to output a comparison signal, the comparison signal having a comparison frequency;

(b) a mixer,

the mixer being configured to accept the reference signal having the local oscillation frequency,

the mixer being configured to output a transmit-loop signal, and

the transmit-loop signal having an intermediate frequency at the output of the mixer;

(c) a second frequency divider,

the second frequency divider being configured to accept the transmit-loop signal having an intermediate frequency,

the second frequency divider being configured to output a divided frequency signal having a divided frequency; and

(d) a variable controlled oscillator, where the variable controlled oscillator outputs a transmission signal, the transmission signal being based in part on a comparison between the comparison signal and the frequency divided signal having a divided frequency.

2. The wireless communication device of claim 1, where the reference signal is generated by a synthesizer.

3. The wireless communication device of claim 1, where the reference signal is processed by a third frequency divider prior to acceptance by the first frequency divider.

4. The wireless communication device of claim 1, further including:

(e) a downconverter, the downconverter configured to accept the reference signal, where the downconverter processes a received carrier waveform using the reference signal.

5. The wireless communication device of claim 1, where the output of the mixer is processed by a modulator prior to acceptance by the second frequency divider.

6. The wireless communication device of claim 1, where the variable controlled oscillator is a voltage controlled oscillator.

7. The wireless communication device of claim 1, where the first frequency divider and the second frequency divider are programmable frequency dividers.

8. The wireless communication device of claim 7, further including:

(e) a frequency plan table, where the frequency plan table includes divide ratios for programming the first frequency divider and the second frequency dividers.

9. A system for transmitting information, the system comprising:

(a) first means for frequency dividing, the first means for frequency dividing being configured to accept a reference signal, having a local oscillation frequency, the first means for frequency dividing configured to output a comparison signal, the comparison signal having a comparison frequency;

(b) mixing means for producing a transmit-loop signal the mixing means configured to accept the reference signal having the local oscillation frequency, the transmit-loop signal having an intermediate frequency at the output of the mixing means;

(c) a second means for frequency dividing, the second means for frequency dividing configured to accept the transmit-loop signal having an intermediate frequency, the second means for frequency dividing being configured to output a divided frequency signal having a divided frequency; and

(d) oscillation means, where the oscillation means outputs a transmission signal, the transmission signal being based in part on a comparison between the comparison signal and the frequency divided signal.

10. The system of claim 9, where the reference signal is generated by a synthesizer.

11. The system of claim 9, where the reference signal is processed by a frequency divider prior to acceptance by the first frequency divider.

12. The system of claim 9, further including:

(e) means for downconverting a received carrier waveform, the means for downconverting configured to accept the reference signal, where the means for downconverting processes a received carrier waveform using the reference signal.

13. The system of claim 9, where the output of the means for mixing is processed by a modulator prior to acceptance by the second means for frequency dividing.

14. The system of claim 9, where the oscillation means is a voltage controlled oscillation means.

15. The system of claim 9, where the first means for frequency dividing and the second means for frequency dividing are programmable means for frequency dividing.

16. The system of claim 15, further including:

(e) means for frequency planning, where the means for frequency planning controls the operation of the first means for frequency dividing.

17. A computer readable medium for transmitting information, the system comprising:

(a) first logic for frequency dividing, the first logic for frequency dividing configured to accept a reference signal, having a local oscillation frequency, the first logic for frequency dividing configured to output a comparison signal, the comparison signal having a comparison frequency;

(b) logic for producing a transmit-loop signal, the logic for producing a transmit-loop signal configured to accept the reference signal having the local oscillation frequency, the transmit-loop signal having an intermediate frequency at the output of the logic for producing a transmit-loop signal;

(c) second logic for frequency dividing, the second logic for frequency dividing configured to accept the transmit-loop signal having an intermediate frequency, the second logic for frequency dividing being configured to output a divided frequency signal having a divided frequency; and

(d) logic for oscillating, where the logic for oscillating outputs a transmission signal, the transmission signal being based in part on a comparison between the comparison signal and the frequency divided signal.

18. The system of claim 17, where the reference signal is generated by a synthesizer.

19. The system of claim 17, where the reference signal is processed by a frequency divider prior to acceptance by the first logic for frequency dividing.

20. The system of claim 17, further including:

(e) logic for downconverting a received carrier waveform, the logic for downconverting configured to accept the reference signal, where the logic for downconverting processes a received carrier waveform using the reference signal.

21. The system of claim 17, where the output of the logic for producing a transmit-loop signal is processed by a modulator prior to acceptance by the second logic for frequency dividing.

22. The system of claim 17, where the first logic for frequency dividing and the second logic for frequency dividing are programmable logic for frequency dividing.

23. The system of claim 22, further including:

(e) logic for a frequency plan table, where the logic for a frequency plan table includes divide ratios for programming the logic for first frequency divider and the logic for second frequency dividers.