计算机工程与应用2012，Vol.48Issue(13)：83-88,6.DOI:10.3778/j.issn.1002-8331.2012.13.019
多用户系统中基于双码本的有限反馈预编码
Limited feedback precoding for multiuser MIMO-OFDM systems with double codebook
摘要
Abstract
Considering the problem of performance loss due to limited feedback in multiuser MIMO-OFDM downlink systems, an novel limited feedback precoding for multiuser MIMO systems based on double codebook is proposed. Only a part channels of subcarrier should be estimated, the maximum SINR criteria is used for selecting optimal codeword from the Grassmannian codebook and perturbation codeword at the receiving, exploiting the correlation between sub-carrier channels of OFDM (Orthogonal Frequency Dvision Multiplexing), to feedback the Grassmannian precoding codeword index and perturbation codeword index to the transmitter and reconstructing the other precoding matrix, then the perturbation codeword is used at the transmitter to get optimal capacity, and compensating for the capacity performance loss due to the limited feedback. Simulation results show that the proposed method to ensure BER performance and the cost of the feedback link, the system throughput are improved effectively.关键词
多用户MIMO/正交频分复用/预编码/有限反馈/双码本Key words
multiuser MIMO/ Orthogonal Frequency Dvision Multiplexing (OFDM)/ precoding/ limited feedback/ double codebook分类
信息技术与安全科学引用本文复制引用
傅洪亮,陶勇,张元..多用户系统中基于双码本的有限反馈预编码[J].计算机工程与应用,2012,48(13):83-88,6.基金项目
国家自然科学基金(No.60940017) （No.60940017）
河南省科技创新杰出青年基金(No.104100510008). （No.104100510008）
