METHOD FOR TRANSMITTING DATA IN MULTIPLE ANTENNA SYSTEM

• US 20110158219A1
• Filed: 07/27/2009
• Published: 06/30/2011
• Est. Priority Date: 07/30/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyun Soo, Lee, Moon II, Ihm, Bin Chul, Chung, Jae Hoon
• Granted Patent: US 8,107,455 B2
• Time in Patent Office: Days
• US Class Current: 370/344
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04L 2025/03414 Multicarrier
• CPC Class Codes: H04L 2025/03426 transmission using multiple-input and multiple-output channels
• CPC Class Codes: H04L 25/0204 of multiple channels
• CPC Class Codes: H04L 25/021 Estimation of channel covariance
• CPC Class Codes: H04L 25/0248 Eigen-space methods
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 25/03866 using scrambling
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0037 Inter-user or inter-terminal allocation

Abstract

A method of sending data in a multiple antenna system according to an aspect of the present invention includes performing precoding on received symbols based on a second codebook generated from a first codebook for a plurality of transmission antennas and sending the precoded symbols. The second codebook is a codebook for transmission antennas which are a multiple of an integer of the plurality of transmission antennas, and a precoding matrix included in the second codebook is generated by a combination of precoding matrices included in the first codebook.

Claims

1-10. -10. (canceled)

11. A method for transmitting a signal in a multiple antenna system, the method performed by a transmitter and comprising:

generating a first group of pre-coding matrices including

12. The method of claim 11, wherein the phase-rotated first pre-coding matrices includes

13. The method of claim 11, wherein the antenna power normalization factor is ½

.

14. The method of claim 11, wherein the radio resource comprises a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal.

15. A method for transmitting a signal in a multiple antenna system, the method performed by a transmitter and comprising:

pre-coding the signal based on a codebook, the codebook comprising a first group of pre-coding matrices and a second group of pre-coding matrices, the first group of pre-coding matrices including

16. The method of claim 15, wherein an antenna power normalization factor of the first group of pre-coding matrices is same as an antenna power normalization factor of the second group of pre-coding matrices.

17. The method of claim 15, wherein the radio resource comprises a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal.

18. The method of claim 15, wherein the codebook is for rank 1 transmission.

19. The method of claim 15, wherein the first croup of pre-coding matrices consist of

20. The method of claim 15, wherein the second group of pre-coding matrices consist of

21. The method of claim 15, wherein the codebook consists of 24 different pre-coding matrices.

22. The method of claim 15, wherein the second group of pre-coding matrices are used for antenna group selection.

23. A transmitter comprising:

a pre-coder for pre-coding the signal based on a codebook, the codebook comprising a first group of pre-coding matrices and a second group of pre-coding matrices, the first group of pre-coding matrices including

24. The transmitter of claim 23, wherein an antenna power normalization factor of the first group of pre-coding matrices is same as an antenna power normalization factor of the second group of pre-coding matrices.

25. The transmitter of claim 23, wherein the radio resource comprises a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal.

26. The transmitter of claim 23, wherein the codebook is for rank 1 transmission.

27. The transmitter of claim 23, wherein the first group of pre-coding matrices consist of

28. The transmitter of claim 23, wherein the second group of pre-coding matrices consist of

29. The transmitter of claim 23, wherein the codebook consists of 24 different pre-coding matrices.

30. The transmitter of claim 23, wherein the second group of pre-coding matrices are used for antenna group selection.