DATA TRANSMISSION METHOD AND APPARATUS IN MULTIPLE ANTENNA SYSTEM

• US 20110310994A1
• Filed: 02/16/2010
• Published: 12/22/2011
• Est. Priority Date: 02/13/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ko, Hyun Soo, Koo, Ja Ho, Chung, Jae Hoon, Lee, Moon II
• Granted Patent: US 8,325,846 B2
• Time in Patent Office: Days
• US Class Current: 375/295
• 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

Abstract

A data transmission method in a multiple antenna system is provided. The method includes: defining a codebook including at least one precoding matrix composed of a plurality of rows and columns, wherein the codebook is at least one of a first type in which all elements of the precoding matrix are non-zero elements, a second type in which any one column of the precoding matrix includes non-zero element and the remaining columns include at least one zero element, and a third type in which all columns of the precoding matrix include at least one zero element; precoding an input symbol by using the defined codebook; and transmitting the precoded symbol.

Claims

1-11. -11. (canceled)

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

pre-coding the signal based on a codebook, the codebook comprising pre-coding matrices, the pre-coding matrices including

13. The method of claim 12, wherein the pre-coding matrices consist of

14. The method of claim 12, wherein the radio resource comprises a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal.

15. The method of claim 12, wherein the codebook is for rank 3 transmission.

16. The method of claim 12, wherein the pre-coded signal is transmitted via four transmit antennas.

17. The method claim 12, wherein the transmitter is implemented in a user equipment.

18. A user equipment comprising:

a pre-coder for pre-coding a signal based on a codebook, the codebook comprising pre-coding matrices, the pre-coding matrices including

19. The user equipment of claim 18, wherein the pre-coding matrices consist of

20. The user equipment of claim 18, wherein the radio resource comprises a Single-Carrier Frequency Division Multiple Access (SC-FDMA) signal.

21. The user equipment of claim 18, wherein the codebook is for rank 3 transmission.

22. The user equipment of claim 18, wherein the pre-coded signal is transmitted via four transmit antennas.

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

pre-coding the signal based on a codebook comprising pre-coding matrices, each pre-coding matrix containing a first column including two nonzero elements, a second column including one nonzero element, and a third column including one nonzero element; and

transmitting the pre-coded signal using a radio resource,

wherein the codebook is a 4-Tx rank 3 codebook, the nonzero elements of the first column are selected from orthogonal vector sets, and each row vector of the pre-coding matrices contains one nonzero element and two zero elements.

24. The method of claim 23, wherein the orthogonal vector sets are determined based on a Binary Phase Shift Keying (BPSK) scheme.

25. The method of claim 23, wherein each of the pre-coding matrices further contains a normalization factor, which is ½

.

26. The method of claim 23, wherein the first column is an antenna combination vector and the second and third columns are an antenna selection vector.

27. The method of claim 23, wherein the codebook consists of 12 different pre-coding matrices.