FTN系统中的低复杂度接收技术比较  

Low-Complexity Receiver Technology in Faster-than-Nyquist Transmission System

作　　者：张广娜[1] 郭明喜[1] 沈越泓[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信技术》2016年第8期960-967,共8页Communications Technology

基　　金：国家自然科学基金资助项目(No.61301157)~~

摘　　要：超奈奎斯特码元速率传输(Faster-than-Nyquist)可以有效提高系统的带宽有效性和通信系统的传输速率,但在接收端不可避免地引入无限长的码间串扰(ISI),增加了接收设备特别是接收机的复杂度。为了降低接收端的复杂度,重点介绍FTN传输系统中的低复杂度接收技术及其改进方案,包括加窗Chase均衡(WCE)和改进型WCE、迭代分组判决反馈均衡器(IBDFE)和低复杂度IBDFE(LC-IBDFE)、判决反馈均衡(DFE)和部分判决反馈均衡(PDFE),同时分别从计算复杂度和系统误码率性能两个方面进行分析比较,给出各方法的优缺点及应用场合。FTN signaling, with faster symbol rate than Nyquist rate, is regarded as a promising technique to improve the bandwidth efficiency. However the unavoidable ISI（inter-symbol interference） in the receiver would usually result in high complexity of the receiving device and the receiver as well. In order to offectively reduce the interference, low-complexity receiver technology and the modified algorithms are proposed, including WCE（Windows Chase Equalization） and FTN-MWCE, IBDFE （Iterative Decision Feedback Equalization） and LC-IBDFE, DFE （Decision Feedback Equalization） and PDFE（Partial Decision Feedback Equalization）. The analysis on and comparison of these algorithms are done respectively from computation complexity and BER performance, and their advantages disadvantages, and applications as well also presented.

关 键 词：超奈奎斯特码元速率传输 码间串扰 低复杂度 接收技术 

分 类 号：TN911[电子电信—通信与信息系统]