摘要
提出了一种用于正交空时分组码(OSTBC:Orthogonal Space-Time Block Code)多发射天线多接收天线系统的盲自适应接收机。该方法主要利用了正交空时分组码的内在特性,给出了一个针对正交空时分组码多发射天线多接收天线系统的无约束代价函数,分析了该函数的全局最小值点。利用该无约束代价函数,通过投影逼近方法给出了递推最小二乘(RLS)自适应算法实现。仿真结果表明:该接收机可以很好的跟踪衰落信道的变化,在不利用导频信号的情况下很好的还原出原始的传输信号。
Based on the inner character of orthogonal space-time block code, this paper presents a blind adaptive receiver for orthogonal space-time block coded multi-input-multi-output antenna system. An unconstrained cost function is provided and its global minima are analyzed. The RLS adaptive algorithm is implemented by employing the projection approximation method. Simulation results demonstrate that the receiver can track the changes of the fading channel and decode the transferred symbols without pilot symbols.
出处
《电波科学学报》
EI
CSCD
北大核心
2007年第4期557-562,共6页
Chinese Journal of Radio Science
基金
国家高科技发展计划资助项目(No.2005AA103320)科发函字[2005]54号
