Method and apparatus for hierarchical codebook design in wireless communication

• US 8,761,086 B2
• Filed: 11/01/2010
• Issued: 06/24/2014
• Est. Priority Date: 11/02/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gorokhov, Alexei Yurievitch, Farajidana, Amir, Montojo, Juan
• Primary Examiner(s): ROBERTS, BRIAN S
• Application Number:
  US12/917,420
• Publication Number:
  US 20110268100A1
• Time in Patent Office: 1,331 Days
• Field of Search: None
• US Class Current: 370/328
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0452 Multi-user MIMO systems
• CPC Class Codes: H04B 7/0456 Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
• CPC Class Codes: H04B 7/0478 Special codebook structures directed to feedback optimisation
• CPC Class Codes: H04B 7/0639 Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports

Abstract

A method for use in a multi-user, multi-input multi-output (MU-MIMO) system includes generating a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized base on a transmission rank and providing the family of codebooks for use in a multiple description coding (MDC) channel feedback scheme.

Claims

1. A method for wireless communication, comprising:

generating a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized based on a transmission rank, the transmission rank being based at least in part on a channel condition observed by a user equipment (UE); and

providing the family of codebooks for use in a multiple description coding (MDC) scheme for channel feedback.

2. The method of claim 1, wherein the plurality of codebooks are organized hierarchically based on the transmission rank.

3. The method of claim 2, further comprising:

subsampling codebooks of a family of codebooks; and

partitioning the subsampled codebooks into a plurality of subfamilies based on the transmission rank, wherein codebooks for transmission ranks greater than one are generated by extending rank 1 codebooks according to a criterion.

4. The method of claim 3, wherein the extending is based on one of a chordal distance and an orthogonal component method.

5. The method of claim 1, wherein the plurality of codebooks are nested based on the transmission rank.

6. The method of claim 5, further comprising partitioning the family of codebooks into a plurality of subfamilies, each subfamily comprising codebooks for a plurality of transmission ranks.

7. The method of claim 5, wherein the nested structure of the plurality of codebooks based on transmission ranks is obtained by:

selecting a set of sub-matrices from matrices in codebooks for a first transmission rank family;

selecting a subset of the selected sub-matrices; and

partitioning the selected subset of sub-matrices into multiple codebooks used for a second transmission rank;

wherein the second transmission rank is less than the first transmission rank.

8. The method of claim 5, further comprising

generating a first family of codebooks for a maximum possible rank;

selecting a subset of codebooks in the first family; and

generating multiple codebooks for lower rank transmissions by sub-sampling matrices of the selected subset of codebooks in the first family.

9. The method of claim 1, further comprising providing a schedule for the MDC channel feedback scheme.

10. The method of claim 1, wherein the generating the family of codebooks comprises generating the family of codebooks by using one of random, Gaussian and unitary matrices.

11. The method of claim 1, wherein the generating the family of codebooks comprises generating the family of codebooks from a given codebook and different unitary transformations on the given codebook.

12. The method of claim 1, wherein the generating the family of codebooks comprises generating the family of codebooks based on a transmitter configuration.

13. An apparatus for wireless communication, comprising:

means for generating a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized based on a transmission rank, the transmission rank being based at least in part on a channel condition observed by a user equipment (UE); and

means for providing the family of codebooks for use in a multiple description coding (MDC) scheme for channel feedback.

14. The apparatus of claim 13, wherein the plurality of codebooks are organized hierarchically based on the transmission rank.

15. The apparatus of claim 14, further comprising:

means for subsampling codebooks of a family of codebooks; and

means for partitioning the subsampled codebooks into a plurality of subfamilies based on the transmission rank, wherein codebooks for transmission ranks greater than one are generated by extending rank 1 codebooks according to a criterion.

16. The apparatus of claim 15, wherein the extending is based on one of a chordal distance and an orthogonal component method.

17. The apparatus of claim 13, wherein the plurality of codebooks are nested based on the transmission rank.

18. The apparatus of claim 17, further comprising means for partitioning the family of codebooks in a plurality of subfamilies, each subfamily comprising codebooks for a plurality of transmission ranks.

19. The apparatus of claim 17, wherein the nested structure of the plurality of codebooks based on transmission ranks is obtained by:

means for selecting a set of sub-matrices from matrices in codebooks for a first transmission rank family;

means for selecting a subset of the selected sub-matrices; and

means for partitioning the selected subset of sub-matrices into multiple codebooks used for a second transmission rank;

wherein the second transmission rank is less than the first transmission rank.

20. The apparatus of claim 17, further comprising:

means for generating a first family of codebooks for the maximum possible rank;

means selecting a subset of codebooks in the first family; and

means for generating multiple codebooks for lower rank transmissions by sub-sampling matrices of the selected subset of codebooks in the first family.

21. The apparatus of claim 13, further comprising means for providing a schedule for the MDC channel feedback scheme.

22. The apparatus of claim 13, wherein the means for generating the family of codebooks comprises means for generating the family of codebooks by using one of random, Gaussian and unitary matrices.

23. The apparatus of claim 13, wherein the means for generating the family of codebooks comprises means for generating the family of codebooks from a given codebook and different unitary transformations on the given codebook.

24. The apparatus of claim 13, wherein the means for generating the family of codebooks comprises means for generating the family of codebooks based on a transmitter configuration.

25. A computer program product comprising a non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium comprising:

instructions for causing at least one computer to generate a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized based on a transmission rank, the transmission rank being based at least in part on a channel condition observed by a user equipment (UE); and

instructions for causing the at least one computer to provide the family of codebooks for use in a multiple description coding (MDC) scheme for channel feedback.

26. The computer program product of claim 25, wherein the plurality of codebooks are organized hierarchically based on the transmission rank.

27. An apparatus for wireless communication, comprising:

a processor configured for;

generating a family of codebooks comprising at least one codebook set, the codebook set comprising a plurality of codebooks organized based on a transmission rank, the transmission rank being based at least in part on a channel condition observed by a user equipment (UE); and

providing the family of codebooks for use in a multiple description coding (MDC) scheme for channel feedback.

28. The apparatus of claim 27, wherein the plurality of codebooks are organized hierarchically based on the transmission rank.