自相关匹配中继间干扰抑制方法  

Autocorrelation Matching Inter-relay Interference Suppression Method

作　　者：王礼锋[1] 李强[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都611731

出　　处：《电子与信息学报》2011年第12期2960-2964,共5页Journal of Electronics & Information Technology

基　　金：国家重大专项(2010ZX03002-008-03);国家自然科学基金面上项目(60972029)资助课题

摘　　要：该文提出一种在两路中继协同系统中基于自相关匹配理论抑制中继间干扰的新方法,实现了在中继端抑制干扰。中继端对信号处理分3部分:首先,将收到的信号中的干扰信号进行有效抑制,与部分干扰消除(PIC)和全干扰消除(FIC)方法相比,新方法对要求中继间时间同步不敏感;其次,信号经过一有限长冲激响应预滤波器,以满足信号的自相关分集特性,两个中继使用的预滤波器是相同的;最后,中继采用放大前传(AF)协议对信号传输。收端将收到的信号先经过一逆滤波器,这是由中继端引入预滤波导致的,然后就可以和常规通信系统一样对信号均衡、解调及译码。与PIC和FIC比较,新方法减少了收端负荷,其性能不依赖于收端知道系统所有链路的完整信道状态信息,而且具有良好的通信性能及鲁棒性。An inter-relay interference suppression method is proposed at the relay based on the Autocorrelation Matching （AM） theory in the two-path relay cooperative system. The new approach takes three steps at the relay. Firstly, the new method is used to remove the inter-relay （PIC） and Full Interference Cancellation （FIC） scheme, interference. Unlike the Partial Interference Cancellation it is insensitive to the time synchronization between the two relays. Secondly, tile signal will pass through a FIR pre-filter to satisfy the autocorrelation diversity condition. The pre-filters of the two relays are identical. Finally, the signal will be Amplified and Forwarded （AF） to the destination. At the destination, the received signal will firstly pass through a reversal filter caused by the relay nodes, then, it will be equalized, demodulated and decoded like the conventional systems. Compared to the PIC and FIC methods, the proposed approach alleviates the burden on the destination and its performance is not so dependent on the assumption that the destination knows the perfect channel state information for every link, moreover, it has good performance and is also robust.

关 键 词：无线通信 两路中继协同系统 自相关匹配理论 同频干扰 放大前传(AF) 

分 类 号：TN925[电子电信—通信与信息系统]