Method and system for a distributed transceiver for high frequency applications

• US 8,027,656 B2
• Filed: 09/24/2007
• Issued: 09/27/2011
• Est. Priority Date: 09/24/2007
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Maryam, Rofougaran, Ahmadreza
• Primary Examiner(s): LE, NHAN T
• Application Number:
  US11/860,207
• Publication Number:
  US 20090081981A1
• Time in Patent Office: 1,464 Days
• Field of Search: 455313-316, 455/323, 455/334, 455/339, 455/341
• US Class Current: 455/316
• 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: H04B 1/0082 with a common local oscillator for more than one band
• CPC Class Codes: H04B 1/04 Circuits
• CPC Class Codes: H04B 1/16 Circuits
• CPC Class Codes: H04B 1/408 the transmitter oscillator frequency being identical to the receiver local oscillator frequency

Abstract

Aspects of a method and system for a distributed transceiver for high frequency applications may include generating a second signal from a first signal by frequency-translating the first signal via a plurality of conversion stages. Each of the plurality of conversion stages may frequency-translate a corresponding input signal by a local oscillator frequency or by a fraction of said local oscillator frequency. The first signal may be the corresponding input signal to an initial stage of a the plurality of conversion stages, an output signal of a previous one of the plurality of conversion stages may be the corresponding input signal to a subsequent one of the plurality of conversion stages, and the second signal may be an output signal of a final stage of the plurality of conversion stages.

Claims

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

generating a second signal from a first signal by;

frequency-translating said first signal via a plurality of conversion stages, wherein;

each of said plurality of conversion stages frequency-translates a corresponding input signal by a local oscillator frequency or by a fraction of said local oscillator frequency; and

said first signal is said corresponding input signal to an initial stage of a said plurality of conversion stages, an output signal of a previous one of said plurality of conversion stages is said corresponding input signal to a subsequent one of said plurality of conversion stages, and said second signal is an output signal of a final stage of said plurality of conversion stages.

2. The method according to claim 1, wherein said plurality of conversion stages are communicatively coupled in a cascade configuration.

3. The method according to claim 1, wherein said first signal is a radio frequency signal or an intermediate frequency signal and said second signal is a baseband signal.

4. The method according to claim 1, wherein said first signal is a radio frequency signal or a baseband signal and said second signal is an intermediate frequency signal.

5. The method according to claim 1, wherein said first signal is a baseband signal or an intermediate frequency signal and said second signal is a radio frequency signal.

6. The method according to claim 1, wherein said local oscillator frequency is associated with a local oscillator signal and said fraction of said local oscillator frequency is associated with a fractional local oscillator signal.

7. The method according to claim 6, comprising generating said fractional local oscillator signal from said local oscillator signal by using one or more frequency dividers.

8. The method according to claim 6, comprising mixing said local oscillator signal and/or one or more mixing signals to generate said fractional local oscillator signal.

9. The method according to claim 8, comprising dividing said local oscillator signal via one or more frequency dividers to generate said one or more mixing signals.

10. The method according to claim 6, wherein said local oscillator signal is a sinusoidal signal with a frequency equal to said local oscillator frequency.

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

one or more circuits, said one or more circuits enabled to generate a second signal from a first signal by;

frequency-translating said first signal via a plurality of conversion stages, wherein;

each of said plurality of conversion stages frequency-translates a corresponding input signal by a local oscillator frequency or by a fraction of said local oscillator frequency; and

said first signal is said corresponding input signal to an initial stage of a said plurality of conversion stages, an output signal of a previous one of said plurality of conversion stages is said corresponding input signal to a subsequent one of said plurality of conversion stages, and said second signal is an output signal of a final stage of said plurality of conversion stages.

12. The system according to claim 11, wherein said plurality of conversion stages are communicatively coupled in a cascade configuration.

13. The system according to claim 11, wherein said first signal is a radio frequency signal or an intermediate frequency signal and said second signal is a baseband signal.

14. The system according to claim 11, wherein said first signal is a radio frequency signal or a baseband signal and said second signal is an intermediate frequency signal.

15. The system according to claim 11, wherein said first signal is a baseband signal or an intermediate frequency signal and said second signal is a radio frequency signal.

16. The system according to claim 11, wherein said local oscillator frequency is associated with a local oscillator signal and said fraction of said local oscillator frequency is associated with a fractional local oscillator signal.

17. The system according to claim 16, wherein said one or more circuits generate said fractional local oscillator signal from said local oscillator signal by using one or more frequency dividers.

18. The system according to claim 16, wherein said one or more circuits mix said local oscillator signal and/or one or more mixing signals to generate said fractional local oscillator signal.

19. The system according to claim 18, wherein said one or more circuits divide said local oscillator signal via one or more frequency dividers to generate said one or more mixing signals.

20. The system according to claim 16, wherein said local oscillator signal is a sinusoidal signal with a frequency equal to said local oscillator frequency.