Correlation-matrix feedback method and system for antenna array

摘要

The present invention provides a correlation-matrix feedback method and system for an antenna array. The method comprises steps of: selecting, at a receiving end, a codeword from a predetermined correlation-matrix codebook comprising a plurality of codewords according to a predetermined criterion to represent a correlation matrix to be fed back (300); and feeding back an index of the selected codeword in the predetermined correlation-matrix codebook to a transmitting end (302); wherein each codeword is a codeword matrix for approximating a correlation matrix of an antenna array at the transmitting end. According to the present invention, it is possible to take good advantage of the characteristics of closely-spaced ULA antennas and spatial correlation thereof, design a corresponding codebook for quantization and feedback, and reduce feedback overhead and computational complexity so as to improve the system performance of a spatial correlation aided system, such as a MIMO system.

主权项

1. A correlation-matrix feedback method for an antenna array, comprising:
selecting, at a receiving end, a codeword from a predetermined correlation-matrix codebook comprising a plurality of codewords according to a predetermined criterion, to represent a correlation matrix to be fed back; and feeding back an index of the selected codeword in the predetermined correlation-matrix codebook to a transmitting end; wherein each codeword is a codeword matrix for approximating a correlation matrix of an antenna array at the transmitting end; wherein the predetermined criterion comprises a matrix colinear criterion; wherein the selecting comprises calculating colinearity between each codeword matrix in the predetermined correlation-matrix codebook and the correlation matrix to be fed back and selecting a codeword matrix with maximum colinearity to represent the correlation matrix to be fed back.