STBC-OFDM系统中有效降低计算量的盲接收机  

Blind multi-user receiver of effectively reducing computation complexity for STBC-OFDM systems

作　　者：贾兰芳[1] 

机构地区：[1]长治学院电子信息与物理系,山西长治046011

出　　处：《计算机工程与应用》2013年第7期147-150,共4页Computer Engineering and Applications

基　　金：山西省自然科学基金(No.2012011028-1);长治学院校级科研项目(No.201218);2012年山西省高等学校大学生创新实验资助项目

摘　　要：为了降低空时分组码-正交频分复用(STBC-OFDM)系统中盲多用户接收机的计算复杂度,将基于子空间的接收机应用到STBC-OFDM系统中,证明其可以有效地降低计算复杂度并加快收敛速度。在此基础上,利用STBC码的正交特性推导出了两个权值之间的关系式,使得计算复杂度又降低了一半。仿真结果表明所提出的盲多用户接收机能剔除常规接收机中的冗余度,在误码率不变的前提下有效地解决了常规接收机中计算量大的问题。To consider effectively reducing computation complexity of multi-user receiver for STBC-OFDM systems, the subspace-based receiver is proposed for STBC-OFDM systems, it can effectively reduce the computational complexity and accelerate the convergence rate. Utilizing the orthogonal feature of STBC, the relation of two weights equation is obtained, which half of the computational cost is saved. Simulation results demonstrate that the blind multi-user receiver can eliminate redundancy of the traditional receiver, the problems of higher computational complexity in traditional receiver are effectively solved and maintain the same BER.

关 键 词：盲多用户接收机 信号子空间接收机 低复杂度 空时分组码 正交频分复用(STBC OFDM) 厄尔米特矩阵 

分 类 号：TN914.5[电子电信—通信与信息系统]