Method and system for bits and coding assignment utilizing Eigen beamforming with fixed rates for closed loop WLAN

• US 7,616,955 B2
• Filed: 02/07/2005
• Issued: 11/10/2009
• Est. Priority Date: 11/12/2004
• Status: Active Grant

• Current Assignee: Broadcom Corporation (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Kim, Joonsuk
• Primary Examiner(s): Bhattacharya; Sam
• Application Number:
  US11/052,389
• Publication Number:
  US 20060105767A1
• Time in Patent Office: 1,737 Days
• Field of Search: 455/67.14, 455/62, 455/63.3, 455/134, 455/138, 455/139, 455/423, 455/557, 455/434, 455/41.2, 370/248, 370/346, 370/468
• US Class Current: 455/434
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0013 Rate matching, e.g. puncturing or repetition of code symbols
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/06 using space diversity

Abstract

A method and system for bits and coding assignment utilizing Eigen beamforming with fixed rates for a closed loop WLAN is provided. Aspects of the method for communicating information in a communication system may comprise transmitting data via a plurality of radio frequency (RF) channels utilizing a plurality of transmitting antennas and receiving feedback information related to the plurality of RF channels. Bits may be assigned for transmission via at least one of the plurality of RF channels based on the feedback information. At least a portion of subsequent data having at least a first coding rate based on the assignment of bits may be transmitted via at least one of the plurality of RF channels. The method may also comprise receiving data via a plurality of RF channels utilizing a plurality of receiving antennas, and transmitting feedback information related to the plurality of RF channels.

Claims

1. A method for communicating information in a communication system, the method comprising:

concurrently transmitting, to a single receiving device, data via a plurality of RF channels utilizing a plurality of transmitting antennas;

receiving feedback information related to said plurality of RF channels;

assigning bits for transmission via said plurality of transmitting antennas based on said feedback information; and

transmitting at least a portion of subsequent data having at least a first coding rate based on said assignment of bits via said at least one of said plurality of RF channels.

2. The method according to claim 1, comprising coding at least a portion of said assigned bits utilizing said first coding rate.

3. The method according to claim 1, comprising computing said first coding rate based on said received feedback information for transmitting said at least a portion of said subsequent data.

4. The method according to claim 1, wherein said received feedback information is based on channel estimation information for at least a portion of said plurality of RF channels.

5. The method according to claim 1, wherein said received feedback information is based on signal to noise ratio information for at least a portion of said plurality of RF channels.

6. The method according to claim 5, wherein said signal to noise ratio information is computed based on at least one transmitted tone for at least one of said plurality of RF channels.

7. The method according to claim 1, comprising computing at least a second coding rate based on said received feedback information for transmitting at least a remaining portion of said subsequent data.

8. The method according to claim 7, comprising coding at least a portion of said assigned bits utilizing said second coding rate.

9. The method according to claim 7, comprising transmitting said at least said remaining portion of said subsequent data having said at least said second coding rate via said at least one of said plurality of RF channels.

10. The method according to claim 1, comprising reassigning bits for transmission based on updated received feedback information related to said plurality of RF channels.

11. A method for communicating information in a communication system, the method comprising:

concurrently receiving, from a single transmitting device, data via a plurality of RF channels utilizing a plurality of receiving antennas; and

transmitting feedback information related to said plurality of RF channels, wherein;

said transmitted feedback information is utilized to assign bits for transmission via at least one of said plurality of RF channels; and

at least a portion of subsequent data having at least a first coding rate is transmitted based on said assignment of bits via said at least one of said plurality of RF channels.

12. The method according to claim 11, wherein at least a portion of said assigned bits is coded utilizing said first coding rate.

13. The method according to claim 11, wherein said first coding rate is computed based on said transmitted feedback information for transmitting said at least a portion of said subsequent data.

14. The method according to claim 11, wherein said transmitted feedback information is based on channel estimation information for at least a portion of said plurality of RF channels.

15. The method according to claim 11, wherein said transmitted feedback information is based on signal to noise ratio information for at least a portion of said plurality of RF channels.

16. The method according to claim 15, wherein said signal to noise ratio information is computed based on at least one transmitted tone for at least one of said plurality of RF channels.

17. The method according to claim 11, wherein at least a second coding rate is computed based on said transmitted feedback information and utilized for transmitting at least a remaining portion of said subsequent data.

18. The method according to claim 17, wherein at least a portion of said assigned bits is coded utilizing said second coding rate.

19. The method according to claim 17, comprising receiving said at least said remaining portion of said subsequent data having said at least said second coding rate via said at least one of said plurality of RF channels.

20. The method according to claim 11, wherein bits for transmission are reassigned based on updated transmitted feedback information related to said plurality of RF channels.

21. A system for communicating information in a communication system, the system comprising:

a transmitter that is operable to concurrently transmit, to a single receiving device, data via a plurality of RF channels utilizing a plurality of transmitting antennas;

said transmitter is operable to receive feedback information related to said plurality of RF channels;

said transmitter is operable to assign bits for transmission via said plurality of transmitting antennas based on said feedback information; and

said transmitter is operable to transmit at least a portion of subsequent data having at least a first coding rate based on said assignment of bits via said at least one of said plurality of RF channels.

22. The system according to claim 21, comprising a processor that is operable to code at least a portion of said assigned bits utilizing said first coding rate in said transmitter.

23. The system according to claim 21, comprising a processor is operable to compute said first coding rate in said transmitter based on said received feedback information for transmitting said at least a portion of said subsequent data.

24. The system according to claim 21, wherein said received feedback information is based on channel estimation information for at least a portion of said plurality of RF channels.

25. The system according to claim 21, wherein said received feedback information is based on signal to noise ratio information for at least a portion of said plurality of RF channels.

26. The system according to claim 25, wherein said signal to noise ratio information is computed based on at least one transmitted tone for at least one of said plurality of RF channels.

27. The system according to claim 21, comprising a processor is operable to compute at least a second coding rate in said transmitter based on said received feedback information for transmitting at least a remaining portion of said subsequent data.

28. The system according to claim 27, wherein said processor is operable to code at least a portion of said assigned bits utilizing said second coding rate in said transmitter.

29. The system according to claim 27, wherein said transmitter is operable to transmit said at least said remaining portion of said subsequent data having said at least said second coding rate via said at least one of said plurality of RF channels.

30. The system according to claim 21, wherein said transmitter is operable to reassign bits for transmission based on updated received feedback information related to said plurality of RF channels.