摘要
多用户MIMO系统上行链路中,多个用户在同一频段内和一个多天线基站进行通信,引入了用户间的多址干扰,在基站需要首先采用合适的多用户检测技术分离各用户接收信号,然后才能正确解调各用户数据,研究上行多用户MIMO系统中的信号检测技术.各用户在发射数据前采用特征波束形成对发射信号进行加权,能够最大化每个用户的信噪比,且系统接收信号与V-BLAST系统的接收信号具有相同的表达形式,因此在系统接收端可以采用V-BLAST检测算法进行多用户检测.仿真比较了几种常见的V-BLAST检测算法应用在单用户MIMO-OFDM系统中的检测性能,联合特征波束形成(EBF)技术和V-BLAST检测算法对上行多用户MIMO-OFDM系统进行多用户检测,仿真结果表明EBF-MMSE-OSIC检测算法具有较优越的检测性能.
Multiple users communicate with a base station in the same frequency band will lead to multiple access interference in the uplink multi-user MIMO system,a suitable multiuser detection technology is necessary for the base station to separate the data of each user,and this paper aimed at studying on the multiuser detection technology.The transmit signal of each user will weighting with Eigen Beam forming vectors before transmission,which can maximize each user＇s signal to noise ratio.And the received signal from multiple users had the same structure with the received signal from the V-BLAST system.Thus,could use the V-BLAST detection algorithms for multiuser detection at the receiver.Simulated and compared the performance of several common V-BLAST detection algorithms in single user MIMO-OFDM system,combined EBF with V-BLAST algorithms for multi-user detection of uplink multi-user MIMO-OFDM system.Simulation results showed that EBF-MMSE-OSIC detection algorithm had a superior detection performance.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2013年第5期579-585,共7页
Journal of Harbin University of Commerce：Natural Sciences Edition
