Method and system for an efficient channel quantization...

Details Method and system for an efficient channel quantization... Method and system for an efficient channel quantization...

2007-06-22

2010-10-26

Ha, Dac V (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S267000, C375S299000

Reexamination Certificate

active

07822102

ABSTRACT:
Aspects of a method and system for an efficient channel quantization method or MIMO pre-coding systems may include quantizing channel state information in a MIMO pre-coding system onto a codebook, which comprises one or more unitary matrices, using a cost function; selecting a quantization function that enables the quantizing based on a number of receive antennas and a number of transmit antennas associated with the MIMO pre-coding system; and selecting the cost function from a set of cost functions based on the number of receive antennas and the number of transmit antennas. The channel state information may be a matrix Ĥ. The set of cost functions may comprise function f(A), which may be defined by the following relationships:f⁡(A)=∑i=1N⁢⁢∑j=1,j≠iN⁢⁢ai,j2⁢⁢and/or⁢⁢f⁡(A)=∑i=1N⁢⁢∑j=1,j≠iN⁢⁢ai,j2-∑i=1N⁢⁢ai,iwhere A is a matrix of size N by N and aijis element (i,j) of matrix A.

REFERENCES:
patent: 7676007 (2010-03-01), Choi et al.
patent: 7684527 (2010-03-01), Yokoyama
patent: 2007/0174038 (2007-07-01), Wang et al.
patent: 2008/0080449 (2008-04-01), Huang et al.
patent: 2009/0323851 (2009-12-01), Ling et al.

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