基于解相关算法的直扩超宽带系统路径间干扰抑制  

Interpath Interference Suppression Scheme for DS-UWB Communication Systems Based on Decorrelating Algorithm

作　　者：杨莘元[1] 殷潜[1] 毕晓艳 吕威 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《宇航学报》2007年第5期1278-1282,共5页Journal of Astronautics

摘　　要：通过研究存在路径间干扰(IPI)时直扩超宽带(DS-UWB)系统的信号模型,提出了在一定条件下DS-UWB部分合并RAKE接收机(PRAKE)与异步CDMA系统有着相似的信号模型。基于这一相似性,将用于多用户检测的解相关算法用于PRAKE中以抑制IPI。使用滑窗法实现了解相关器并进行了计算机仿真,仿真结果表明该方法能显著改善PRAKE接收机在CM1信道中的性能,在衰落更为严重的CM3信道中系统性能也有少许改善。Similarities between the signal model of asynchronous CDMA system and the signal model of DS-UWB partial combining RAKE receiver (PRAKE) are found by studying DS-UWB system with interpath interference (IPI).Based on these similarities decorrelating algorithm,which is commonly used in multi-user detection,is introduced to PRAKE to combat IPI.Sliding window approach is utilized for implementation of the decorrelator and computer simulations verify that the proposed decorrelating scheme can significantly impro...

关 键 词：直接序列超宽带(DS-UWB) 路径间干扰 解相关算法 部分RAKE接收机 

分 类 号：TN914.42[电子电信—通信与信息系统]