一种基于STBC的SC-FDE系统双天线联合检测算法  

A Novel Joint Detection Algorithm of Dual-Antennas in STBC-SC-FDE System

作　　者：吴世奇[1] 

机构地区：[1]中国西南电子技术研究所,四川成都610036

出　　处：《通信技术》2015年第5期546-550,共5页Communications Technology

摘　　要：针对双发双收的基于空时分组编码的单载波频域均衡(STBC-SC-FDE)系统,研究了一种双天线联合检测算法,通过信道估计、导频干扰消除、加权联合均衡等过程重构发送的信息。并根据信噪比对频域信号与均衡矩阵进行加权处理,使联合检测算法适用于2路接收信号信噪比不同的情况。仿真结果表明,所提出的双天线联合检测算法在SUI-3信道下最大可获得约8d B的接收分集增益。与时域最大比合并(MRC)算法相比,由于采用联合检测,该算法能有效改善系统在多径衰落信道下的误码率。Aiming at STBC-SC-FDE（ STBC-based Single Carrier Frequency Domain Equalization）system with two transmissions and two receiver antennas,a joint detection algorithm of dual antennas is proposed. The transmitted data is reconstructed through several processing algorithms,including channel estimation,pilot interference mitigation and weighted joint equalization. By weighted processing of frequency domain signal and equalization matrix based on SNR,the joint detection algorithm is available when SNR of two-way received signals are different. Simulation results show that the proposed dual-antenna detection algorithm could achieve about 8db diversity gain in in maximum SUI-3 channel. And as compared with time domain MRC（ Maximal-Ratio-Combining） algorithm,the proposed algorithm could effectively reduce BER in multi-path fading channel via joint detection.

关 键 词：联合检测 空间分集 加权联合均衡 空时分组编码 单载波频域均衡 

分 类 号：TN911.5[电子电信—通信与信息系统]