基于快速解扩滤波器优化的DS-CDMA多用户干扰抑制  

INTERFERENCE REJECTION IN DS-CDMA MULTIUSER SYSTEMS BASED ON FAST OPTIMIZATION OF THE DESPREADING FILTER

作　　者：李平安[1] 胡兵[1] 章红[2] 杨霄鹏[2] 

机构地区：[1]西北工业大学电子工程系,西安710072 [2]空军工程大学电讯工程学院,西安710077

出　　处：《电子与信息学报》2002年第2期170-175,共6页Journal of Electronics & Information Technology

基　　金：国家教育部优秀青年教师基金;西工大双新人才建设基金

摘　　要：该文提出了一种新的DS-CDMA信号检测方法,采用正交锚定的旁瓣抵消器结构和训练序列,基于最小滤波器输出能量准则,实现了解扩滤波器快速非自适应优化,并通过测定码匹配滤波器输出的信号干扰噪声比,有效控制了码匹配滤波器失配对滤波器优化的影响,从而实现了稳健的多用户联合信道干扰抑制。进一步采用RAKE技术,提高了Rayleigh衰落信道中接收机的性能。In this paper, a new technique for DS-CDMA signal detection is proposed. By using the orthogonally-anchored generalized sidelobe canceller structure and training sequence, last/uonadaptive optimization is achieved based on the minimum-output-energy criterion. The output signal to interference plus noise ratio of the code matched filter is effectively applied to suppress the effect of mismatch on optimization of the despreading filter, which results in robust multi-user access interference cancellation. Furthermore, the RAKE combining technique is used to improve the performance of the receiver in Rayleigh fading channels.

关 键 词：快速解扩滤波器优化 DS-CDMA多用户干扰抑制 码分多址 

分 类 号：TN914.53[电子电信—通信与信息系统]