多载波垂直分层空时系统的移不变性编码及其解码  

Shift-Invariance Coding and Decoding for Multicarrier V-BLAST System

作　　者：吴晓军[1] 李星[1] 王继龙[1] 王常吉[1] 

机构地区：[1]清华大学信息科学与技术学院,北京100084

出　　处：《电子与信息学报》2005年第5期673-678,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(90104027)国家973计划项目(2003CB314807)中国博士后科学基金(2003034164)资助课题

摘　　要：该文将多载波(MultiCarrier,MC)技术引入垂直型贝尔实验室分层空时(Vertical Bell Labs lAyered Space-Time,V-BLAST)结构,所形成的MC V-BLAST系统能更好地利用宽带移动无线多媒体通信条件下频率选择性所产生的频域分集能力。该文着重研究MC V-BLAST系统在下行频率选择性衰落环境中的解码问题。该文首先为MC V-BLAST系统提出了一种新颖的移不变性编码方法。利用上述移不变性性质,该文进一步为MC V-BLAST系统提出了一种无需了解信道状态信息(Channel State Information,CSI)的解码算法。仿真结果表明了该文新颖移不变性编码方法的有效性和解码算法的性能。The combining form of the MultiCarrier (MC) technique with the Vertical Bell Labs lAyered Space-Time (V-BLAST) architecture, i.e., the MC V-BLAST system, can better take advantage of the frequency diversity force resulting from the frequency-selective feature in the broadband mobile wireless multimedia communications. This paper explores the decoding problem of the MC V-BLAST system under the downlink frequency-selective fading environment. One novel shift-invariance coding scheme is firstly proposed for the MC V-BLAST system. Successively, by exploiting the above shift-invariance property, a decoding algorithm without knowing Channel State Information (CSI) is derived. Simulations demonstrate the validity of the novel shift-invariance coding scheme and the performance of the decoding algorithm.

关 键 词：多载波 垂直型贝尔实验室分层空时结构 频率选择性衰落 解码算法 移不变性编码 

分 类 号：TN929.5[电子电信—通信与信息系统]