METHOD AND SYSTEM FOR SHARING RF FILTERS IN SYSTEMS SUPPORTING WCDMA AND GSM

• US 20080080453A1
• Filed: 09/29/2006
• Published: 04/03/2008
• Est. Priority Date: 09/29/2006
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Rofougaran, Ahmadreza
• Granted Patent: US 8,233,935 B2
• Time in Patent Office: Days
• US Class Current: 370/342
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges

Abstract

Aspects of a method and system for sharing RF filters in systems supporting WCDMA and GSM are provided. A receiver in a wireless device enables receiving WCDMA signals and GSM signals. The WCDMA signals may be received via at least one duplexer within the wireless device. A processing path for the received WCDMA signals or a processing path for the received GSM signals may be selected within the receiver. The processing paths may share bandpass filtering and signal amplification. A gain in the shared signal amplification may be adjusted after filtering the received signals. For received WCDMA signals, the gain adjustment may be based on a gain provided to the received WCDMA signals before applying the shared bandpass filtering. At least one signal may be generated for selecting the processing path and/or for adjusting the shared signal amplification gain.

Claims

1. A method for handling wireless signals, the method comprising:

receiving a first wireless protocol signals and a second wireless protocol signals via a receiver in a wireless device, wherein said first wireless protocol signals are received via at least one duplexer within said wireless device; and

selecting within said receiver one of;

a processing path for said received first wireless protocol signals and a processing path for said received second wireless protocol signals, wherein said processing paths share bandpass filtering and signal amplification.

2. The method according to claim 1, wherein said first wireless protocol signals is one of:

HSDPA, HSUDPA, and WCDMA wireless protocol signals.

3. The method according to claim 1, wherein said second wireless protocol signals is one of:

GPRS, EDGE, and GSM wireless protocol signals.

4. The method according to claim 1, comprising filtering said received first wireless protocol signals via said shared bandpass filtering in said processing path for said received first wireless protocol signals.

5. The method according to claim 4, comprising adjusting a gain in said shared signal amplification after said filtering, wherein said adjusting is based on a gain provided to said received first wireless protocol signals before said filtering.

6. The method according to claim 1, comprising filtering said received second wireless protocol signals via said shared bandpass filtering in said processing path for said received second wireless protocol signals.

7. The method according to claim 6, comprising adjusting a gain in said shared signal amplification after said filtering.

8. The method according to claim 1, comprising generating at least one signal for said selecting one of:

said processing path for said received first wireless protocol signals and said processing path for said received second wireless protocol signals.

9. The method according to claim 1, comprising generating at least one signal for said adjusting of said gain in said selected processing path.

10. A machine-readable storage having stored thereon, a computer program having at least one code section for handling wireless signals, the at least one code section being executable by a machine for causing the machine to perform steps comprising:

receiving a first wireless protocol signals and a second wireless protocol signals via a receiver in a wireless device, wherein said first wireless protocol signals are received via at least one duplexer within said wireless device; and

selecting within said receiver one of;

a processing path for said received first wireless protocol signals and a processing path for said received second wireless protocol signals, wherein said processing paths share bandpass filtering and signal amplification.

11. The machine-readable storage according to claim 10, wherein said first wireless protocol signals is one of:

HSDPA, HSUDPA, and WCDMA wireless protocol signals.

12. The machine-readable storage according to claim 10, wherein said second wireless protocol signals is one of:

GPRS, EDGE, and GSM wireless protocol signals.

13. The machine-readable storage according to claim 10, wherein said at least one code section comprises code for filtering said received first wireless protocol signals via said shared bandpass filtering in said processing path for said received first wireless protocol signals.

14. The machine-readable storage according to claim 13, wherein said at least one code section comprises code for adjusting a gain in said shared signal amplification after said filtering, wherein said adjusting is based on a gain provided to said received first wireless protocol signals before said filtering.

15. The machine-readable storage according to claim 10, wherein said at least one code section comprises code for filtering said received second wireless protocol signals via said shared bandpass filtering in said processing path for said received second wireless protocol signals.

16. The machine-readable storage according to claim 15, wherein said at least one code section comprises code for adjusting a gain in said shared signal amplification after said filtering.

17. The machine-readable storage according to claim 10, wherein said at least one code section comprises code for generating at least one signal for said selecting one of:

said processing path for said received first wireless protocol signals and said processing path for said received second wireless protocol signals.

18. The machine-readable storage according to claim 10, wherein said at least one code section comprises code for generating at least one signal for said adjusting of said gain in said selected processing path.

19. A system for handling wireless signals, the system comprising:

a receiver in a wireless device that enables receiving a first wireless protocol signals and a second wireless protocol signals, wherein said first wireless protocol signals are received via at least one duplexer within said wireless device; and

said receiver enables selecting one of;

a processing path within said receiver for said received first wireless protocol signals and a processing path within said receiver for said received second wireless protocol signals, wherein said processing paths share bandpass filtering and signal amplification.

20. The system according to claim 19, wherein said first wireless protocol signals is one of:

HSDPA, HSUDPA, and WCDMA wireless protocol signals.

21. The system according to claim 19, wherein said second wireless protocol signals is one of:

GPRS, EDGE, and GSM wireless protocol signals.

22. The system according to claim 19, wherein said receiver enables filtering of said received first wireless protocol signals via said shared bandpass filtering in said processing path for said received first wireless protocol signals.

23. The system according to claim 22, wherein said receiver enables adjusting of a gain in said shared signal amplification after said filtering, wherein said adjusting is based on a gain provided to said received first wireless protocol signals before said filtering.

24. The system according to claim 19, wherein said receiver enables filtering of said received second wireless protocol signals via said shared bandpass filtering in said processing path for said received second wireless protocol signals.

25. The system according to claim 24, wherein said receiver enables adjusting of a gain in said shared signal amplification after said filtering.

26. The system according to claim 19, wherein said receiver enables generating at least one signal for said selecting one of:

said processing path for said received first wireless protocol signals and said processing path for said received second wireless protocol signals.

27. The system according to claim 19, wherein said receiver enables generating at least one signal for said adjusting of said gain in said selected processing path.

28. A method for handling multiple protocol signals in a wireless terminal, the method comprising processing received wideband signals and time division multiplexed signals using the same filtering circuit and signal amplification circuit in the wireless terminal.

29. The system according to claim 28, wherein said wideband signal comprises WCDMA signals.

30. The system according to claim 28, wherein said time division multiplexed signals comprises at least one of:

GSM, GPRS and EDGE signals.