MULIPLE INPUT MULTIPLE OUTPUT COMMNICATION SYSTEM AND COMMUNICATION METHOD OF ADAPTABLY GENERATING CODEBOOK AND USING GENERATED CODEBOOK

摘要

A multi Input/output communications method for adaptively producing a code book and using a radio resource for improving the performance of a communication system are provided to improve data transfer rate and reduce quantization error by generating the code book according to autocorrelation matrix of the channel matrix. A channel estimator(521) estimates a channel formed between a base station and a terminal and calculates a channel matrix. A code book generator(522) adaptively produces the code book based on the auto correlation matrix of the channel matrix. The code book generator generates the code book by using previously stored vectors and the auto correlation matrix.