A Codebook Design Scheme for MIMO System

This paper proposed an adaptive codebook design method based on codebook rotation, without changing the existing base matrix of the codebook,and according to the statistics and estimation results of the BER and SINR, to generate a new set of rotation matrix codebook. Moreover, combing with the overhead of the feedback and the original base codebook matrix, to constitute a matrix of pairs of codebook. Furthermore, according to the real-time changes of the channel, to adjust the accuracy of the codebook timely.Consequently, the performance of the precoding had been improved more effectively within the limited feedback.