Method and system for antenna selection diversity with biasing

• US 8,428,541 B2
• Filed: 03/16/2010
• Issued: 04/23/2013
• Est. Priority Date: 02/24/2004
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Moorti, Rajendra Tushar, Hoo, Min Chuin, Trachewsky, Jason Alexander
• Primary Examiner(s): Yun, Eugene
• Application Number:
  US12/725,060
• Publication Number:
  US 20100173590A1
• Time in Patent Office: 1,134 Days
• Field of Search: 455/277.2, 455/278.1, 455/279.1, 455/132, 455/133, 455/135, 455/283, 455/296, 455/67.11, 455/67.13, 455/63.1, 455/500, 455/146, 455/225, 455/303
• US Class Current: 455/296
• CPC Class Codes: H01Q 1/1257 using the received signal strength
• CPC Class Codes: H04B 1/1027 assessing signal quality or detecting noise/interference for the received signal
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 7/0805 with single receiver and antenna switching H04B7/0822 takes precedence

Abstract

A method for choosing at least one signal path is disclosed and may include determining a power level characteristic for each of a plurality of signal paths. The determined power level characteristic for each of the plurality of signal paths may be modified. At least one of the plurality of signal paths may be selected for receiving a signal. The selecting may be based on at least one of the modified power level characteristics. The method may also include cycling through at least one of the signal paths. The power level characteristic for each of the plurality of signal paths may be biased. The power level characteristic for each of the plurality of signal paths may be increased by a fixed amount.

Claims

1. A method for choosing at least one signal path, the method comprising:

determining an interference level characteristic for each of a plurality of signal paths, each of the signal paths corresponding to a respective one of a plurality of antennas;

biasing the determined interference level characteristic for at least one of the plurality of signal paths; and

selecting at least one of said plurality of signal paths for receiving a signal, wherein said selecting is based at least in part on at least one of the biased interference level characteristics.

2. The method of claim 1, wherein the interference level characteristic comprises a signal-to-interference ratio.

3. The method of claim 1, further comprising cycling through at least one of the signal paths.

4. The method of claim 1, wherein the biasing comprises increasing the interference level characteristic for the at least one of the plurality of signal paths by a fixed amount.

5. The method of claim 1, wherein the biasing comprises increasing the interference level characteristic for the at least one of the plurality of signal paths by a predetermined amount.

6. The method of claim 1, wherein the biasing comprises dynamically changing the interference level characteristic for the at least one of the plurality of signal paths.

7. The method of claim 1, wherein the biasing comprises decreasing the interference level characteristic for the at least one of the plurality of signal paths by at least one of a fixed amount and a predetermined amount.

8. The method of claim 1, wherein the selecting comprises selecting a signal path with an interference level characteristic greater than at least one biased interference level characteristic.

9. The method of claim 1, wherein the selecting comprises electing a signal path with an interference level characteristic less than at least one biased interference level characteristic.

10. A system for selecting at least one signal path, the system comprising:

at least one processor configured to;

determine an interference level characteristic for each of a plurality of signal paths, each of the signal paths corresponding to a respective one of a plurality of antennas;

bias the determined interference level characteristic for at least one of the plurality of signal paths; and

select at least one of said plurality of signal paths for receiving a signal,

wherein said selecting is based at least in part on at least one of the biased interference level characteristics.

11. The system of claim 10, wherein the interference level characteristic comprises a signal-to-interference ratio.

12. The system of claim 10, further comprising cycling through at least one of the signal paths.

13. The system of claim 10, wherein the biasing comprises increasing the interference level characteristic for the at least one of the plurality of signal paths by a fixed amount.

14. The system of claim 10, wherein the biasing comprises increasing the interference level characteristic for the at least one of the plurality of signal paths by a predetermined amount.

15. The system of claim 10, wherein the biasing comprises dynamically changing the interference level characteristic for the at least one of the plurality of signal paths.

16. The system of claim 10, wherein the biasing comprises decreasing the interference level characteristic for the at least one of the plurality of signal paths by at least one of a fixed amount and a predetermined amount.

17. The system of claim 10, wherein the selecting comprises selecting a signal path with an interference level characteristic greater than at least one biased interference level characteristic.

18. The system of claim 10, comprising selecting a signal path with an interference level characteristic less than at least one biased interference level characteristic.

19. A system for selecting at least one signal path, the system comprising:

means for determining an interference level characteristic for each of a plurality of signal paths, each of the signal paths corresponding to a respective one of a plurality of antennas;

means for biasing the determined interference level characteristic for at least one of the plurality of signal paths; and

means for selecting at least one of said plurality of signal paths for receiving a signal, wherein said selecting is based at least in part on at least one of the biased interference level characteristics.

20. The system of claim 19, wherein the means for biasing is configured to dynamically change the interference level characteristic for the at least one of the plurality of signal paths.