Method and system for codebook design of MIMO pre-coders...

Details Method and system for codebook design of MIMO pre-coders... Method and system for codebook design of MIMO pre-coders...

2011-07-19

2011-07-19

Ha, Dac V (Department: 2611)

Pulse or digital communications

Spread spectrum

Direct sequence

C375S267000, C375S299000

Reexamination Certificate

active

07983322

ABSTRACT:
Aspects of a method and system for codebook design of MIMO pre-coders with finite rate channel state information feedback may include quantizing channel state information in a MIMO pre-coding system onto a codebook, which include unitary matrices, using a cost function. The codebook may be iteratively updated based on at least the channel state information. The channel state information may comprise a matrix V. The cost function f(A) is defined by the following relationship:f⁡(A)=(1N⁢∑j=1N⁢⁢ajj2)where A is a matrix of size N by N and aijis element (i,j) of matrix A. Voronoi regions may be generated from the codebook for the unitary matrices. A set of matrices based on the Voronoi regions and the unitary matrices may be generated. Updating the codebook may be achieved by modifying the set of matrices into a new set of unitary matrices, where the new set of unitary matrices become the codebook.

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