Method and system for transmitting multiple channels on FM bands

• US 7,983,617 B2
• Filed: 11/07/2007
• Issued: 07/19/2011
• Est. Priority Date: 03/19/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Ibrahim, Brima
• Primary Examiner(s): Trinh; Sonny
• Application Number:
  US11/936,156
• Publication Number:
  US 20080233882A1
• Time in Patent Office: 1,350 Days
• Field of Search: 455/42, 455/102, 455/106, 455/107, 455/91, 455/73, 455/112, 455/113, 455/118, 455/205, 455/61
• US Class Current: 455/42
• CPC Class Codes: H03L 7/085 concerning mainly the frequency- or phase-detection arrangement including the filtering or amplification of its output signal H03L7/10 takes precedence; circuits for comparing the phase or frequency of two mutually-independent oscillations H03D13/00
• CPC Class Codes: H03L 7/181 a numerical count result being used for locking the loop, the counter counting during fixed time intervals H03L7/1806 takes precedence

Abstract

Aspects of a method and system for transmitting multiple channels on FM bands may include generating from one or more baseband signals, a plurality of radio frequency transmission signals each at a different radio frequency, wherein the one or more baseband signals comprise an in-phase signal component and/or a quadrature signal component. Suitable combinations of the one or more baseband signals may be modulated in a radio frequency transmission chain that may comprise intermediate frequency modulation and radio frequency modulation. The suitable combinations of the one or more baseband signals may be weighted sums. The plurality of radio frequency signals may each carry distinct information. One of the plurality of radio frequency signals may be centered at a frequency f1+f2 and another one of said plurality of radio frequency signals may be centered at a frequency f1−f2, where f1 and f2 are frequencies.

Claims

1. A method for processing communication signals, the method comprising:

generating from one or more baseband signals, a plurality of radio frequency transmission signals each at a different radio frequency, wherein said one or more baseband signals comprise an in-phase signal component and/or a quadrature signal component; and

modulating in a radio frequency transmission chain, combinations of said one or more baseband signal, to generate said plurality of radio frequency transmission signals, wherein said radio frequency transmission chain enables intermediate frequency modulation and radio frequency modulation.

2. The method according to claim 1, wherein said suitable combinations of said one or more baseband signals may be weighted sums.

3. The method according to claim 1, wherein said plurality of radio frequency signals each carry distinct information.

4. The method according to claim 1, wherein one of said plurality of radio frequency signals is centered at a frequency f1+f2 and another one of said plurality of radio frequency signals is centered at a frequency f1−

f2, where f1 and f2 are frequencies.

5. The method according to claim 4, wherein said frequencies f1 and f2 correspond to said radio frequency modulation and said intermediate frequency modulation.

6. The method according to claim 1, wherein said plurality of radio frequency transmission signals are frequency modulated signals.

7. The method according to claim 1, comprising summing, in said radio frequency transmission chain, a plurality of intermediate frequency signal components and perform said radio frequency modulation on said sum of said plurality of intermediate frequency signal components.

8. The method according to claim 1, comprising summing, in said radio frequency transmission chain, a plurality of radio frequency signal components, to obtain said plurality of radio frequency transmission signals.

9. The method according to claim 1, comprising up-converting said suitable combinations of said one or more baseband signals to radio frequency signals.

10. A system for processing communication signals, the system comprising:

one or more circuits, said one or more circuits enable;

generation from one or more baseband signals, of a plurality of radio frequency transmission signals each at a different radio frequency, wherein said one or more baseband signals comprise an in-phase signal component and/or a quadrature signal component; and

modulation in a radio frequency transmission chain, combinations of said one or more baseband signal, to generate said plurality of radio frequency transmission signals, wherein said radio frequency transmission chain enables intermediate frequency modulation and radio frequency modulation.

11. The system according to claim 10, wherein said suitable combinations of said one or more baseband signals may be weighted sums.

12. The system according to claim 10, wherein said plurality of radio frequency signals each carry distinct information.

13. The system according to claim 10, wherein one of said plurality of radio frequency signals is centered at a frequency f1+f2 and another one of said plurality of radio frequency signals is centered at a frequency f1−

f2, where f1 and f2 are frequencies.

14. The system according to claim 13, wherein said frequencies f1 and f2 correspond to said radio frequency modulation and said intermediate frequency modulation.

15. The system according to claim 10, wherein said plurality of radio frequency transmission signals are frequency modulated signals.

16. The system according to claim 10, wherein said one or more circuits sum, in said radio frequency transmission chain, a plurality of intermediate frequency signal components and perform said radio frequency modulation on said sum of said plurality of intermediate frequency signal components.

17. The system according to claim 10, wherein said one or more circuits sum, in said radio frequency transmission chain, a plurality of radio frequency signal components, to obtain said plurality of radio frequency transmission signals.

18. The system according to claim 10, wherein said one or more circuits up-convert said suitable combinations of said one or more baseband signals to radio frequency signals.