MIMO wireless precoding system robust to power imbalance

Details MIMO wireless precoding system robust to power imbalance MIMO wireless precoding system robust to power imbalance

2008-05-30

2009-12-08

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Coding by table look-up techniques

C375S260000, C708S607000, C704S238000

Reexamination Certificate

active

07629902

ABSTRACT:
The present invention relates to methods and apparatus for preventing power imbalance in a multiple input multiple output (MIMO) wireless precoding system. According to one aspect of the present invention, a codebook is constructed with a first subset of codewords that are constant modulus matrices, and a second subset of codewords that are non-constant modulus matrices. A mapping scheme is established between the first subset of codewords and the second subset of codewords. When a unit of user equipment feeds back a first codeword that is a non-constant modulus matrix, the Node-B may replace the first codewords with a second codeword that is selected from the first subset of codewords and that corresponds to the first codeword in accordance with the mapping scheme.

REFERENCES:
patent: 5574957 (1996-11-01), Barnard et al.
patent: 6006111 (1999-12-01), Rowland
patent: 6342810 (2002-01-01), Wright et al.
patent: 6345126 (2002-02-01), Vishwanath et al.
patent: 7139539 (2006-11-01), Chun
3GPP TSG RAN WG1 Meeting #49, R1-072597, “Way Forward on 4-Tx Antenna Codebook for SU-MIMO”, Kobe, Japan, Mar. 26-30, 2007.
3GPP TSG RAN WG1 Meeting #49, R1-072581, “Way Forward on Codebook design for 4Tx SU MIMO”, Kobe, Japan, May 7-11, 2007.
3GPP TSG RAN WG1 Meeting #49, R1-072582, “Way Forward on SU MIMO Codebook design for 4Tx dual polarized antennas”, Kobe, Japan, May 7-11, 2007.

Affiliated with

Also associated with

Rating

MIMO wireless precoding system robust to power imbalance does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with MIMO wireless precoding system robust to power imbalance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MIMO wireless precoding system robust to power imbalance will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4139206