DS-CDMA系统利用空时分组码的干扰抑制方法  

Space-Time Block Codes for Interference Cancellation in DS-CDMA Systems

作　　者：单红梅[1] 胡光锐[1] 赵海波[1] 

机构地区：[1]上海交通大学电子工程系,上海200030

出　　处：《上海交通大学学报》2005年第4期629-632,共4页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(60172018)

摘　　要：在无线通信中,为了提高衰落信道中数据传输的性能,空时分组码的发射分集技术获得越来越多的关注.针对非同步快速衰落的多址信道,在不同数目的小区蜂窝网络内,分别在2个和4个发射天线上利用空时分组码的发射分集技术进行干扰抑制,研究了DS-CDMA系统的误码率,并评估了分集增益和抗干扰能力间的关系,验证了空时分组码抑制小区间干扰和小区内干扰的能力.In wireless communication, diversity techniques are widely used in order to improve the performance of data transmission over fading radio channels. In particular, transmitter diversity is gaining a lot of attention lately in the wireless community. In multiple cellular multiple access communication, data transmission can not be carried through reliably because of the interferences from inter-cell and intra-cell interference. In the paper, space-time block codes at two and four transmit antennas are used for interference cancellation in asynchronous fast-fading multiple access channels. In DS-CDMA system, the bit-error-rate is computed and the relationship between diversity gain and interference cancellation is assessed. It is proved that space-time block code can improve system performance by canceling inter-cell and intra-cell interference.

关 键 词：空时分组码 发射分集 多址通信 直接序列码分多址 

分 类 号：TN914[电子电信—通信与信息系统]