基于零向波束形成和旁瓣抑制的MIMO-OFDM系统码本设计  

Codebook Design for MIMO-OFDM System Based on Null-Steerin Beamforming and Sidelobe Suppression

作　　者：祁博宇[1] 

机构地区：[1]南京信息工程大学,江苏南京210044

出　　处：《现代电子技术》2009年第23期81-84,共4页Modern Electronics Technique

基　　金：南京信息工程大学科研基金资助项目(20070008)

摘　　要：MIMO系统可提高通信系统的容量和频谱的利用率,支持高速数据传输,是下一代无线传输系统的关键技术。在MIMO系统中,当发射端已知信道状态信息时,利用有限反馈的预编码可提高系统的性能。已有的码本设计方法,有的实现较为复杂,有的受到信道的限制。根据零向准则波束形成器的原理,结合降低天线副瓣的方法,实现了一种MIMO-OFDM系统预编码码本的设计。将此码本用于MIMO-OFDM系统有限反馈的预编码中,经仿真结果验证了码本设计方法的有效性。该码本的设计复杂度低,具有较好的性能。Multiple- input Multiple- output（MIMO）system has the advantages of high system capacity and spectral efficiency,and it is a kind of key technology in next generation wireless transmission system. System performance can be improved with limited feedback precoding when CSI is known by transmitter in MIMO system. The design methods of codebooks are complex or restricted by channel states. A codebook designed method based on null - steering beamforming and sidelobe suppression is presented. The computer simulation is implemented. The simulation results show that it is effective in MIMO - OFDM system with precoding. It has the advantages of low complexity.

关 键 词：MIMO OFDM 预编码 码本 零向波束形成 旁瓣抑制 

分 类 号：TN911[电子电信—通信与信息系统]