几种接收机在宽带相关信道下的性能分析  

Performance compared analysis of receivers based on virtual MIMO channels

作　　者：王中鹏[1,2] 朱炜[3] 张乃明 吴伟陵[1] 

机构地区：[1]北京邮电大学 [2]浙江科技学院计算机与电子工程学系,浙江杭州310012 [3]丽水学院计算机系 [4]锦州市人民政府无线电管理委员会

出　　处：《电路与系统学报》2005年第3期140-144,共5页Journal of Circuits and Systems

基　　金：国家自然科学基金资助项目(60172051);国家863基金资助项目(2001AA123016)

摘　　要：介绍了宽带相关MIMO信道模型。通过引入虚拟天线思想[1],窄带MIMO的空时信号处理算法可直接推广到宽带MIMO系统中。在发射端相关宽带信道下,对几种空时接收机做了仿真分析。计算机仿真结果表明:所有接收机的性能随相关系数的增大而性能下降,但在相关系数小于0.4时接收机的性能变化不大,MMSE-VBLAST接收机的性能最好,ZF-VBLAST与ZF、MMSE接收机相比在算法复杂度和性能上没有优势。A wideband correlated MIMO wireless channel model is introduced .The algorithms in flat fading MIMO systems can be directly used in wideband correlated MIMO case based on virtual antennas idea. The performances of several space-time receivers are analyzed on correlated frequency selective channel by simulation. The result of simulation shows the performance of receivers is all degraded, but the performance degradation due to the correlations between transmit antennas is not that significant if the correlation coefficient remains within 0.4. The performance of MMSE-VBLAST is the best; ZF-VBLAST hasn’t advantage over ZF and MMSE receiver at the performance and algorithms complexity.

关 键 词：多入多出 空时信号处理 频率选择信道 信道相关性 

分 类 号：TN911.2[电子电信—通信与信息系统]