Limited feedback precoding for multiuser systems based on codebook
Yuan Zhang · Jisuanji gongcheng yu sheji · 2011
To improve the problem of performance loss due to limited feedback in multiuser systems,a novel limited feedback precoding for multiuser mimo systems based on codebook is proposed.Only a part subcarrier channels should be estimated,the maximum SINR criteria is used for selecting optimal codeword from the codebook at the receiving,exploiting the correlation between sub-carrier channels to reconstruct the other precoding matrix,feedback the precoding codeword index to the transmitter,then the array preprccessing is used at the transmitter and receiver to get optimal capacity,and compensating for the performance loss due to the limited feedback.Simulation results show that the proposed method to ensure the cost of the feedback link,the system throughput and BER performance are improved effectively.