Coded Modulation Faster-than-Nyquist Transmission with Precoder and Channel Shortening Optimization  

作　　者：Hui Che Yong Bai 

机构地区：[1]School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China [2]School of Information and Communication Engineering,Hainan University,Haikou 570228,China

出　　处：《China Communications》2021年第2期49-64,共16页中国通信（英文版）

基　　金：This work was supported by National Natural Science Foundation of China(No.61961014).

摘　　要：Faster-than-Nyquist(FTN)signaling can improve the spectrum efficiency(SE)of the transmission system.In this paper,we propose a coded modulation FTN(CM-FTN)transmission scheme with precoder and channel shortening(CS)optimization to improve bit error rate(BER)performance and reduce the complexity of FTN equalizer.In our proposal,the information rate(IR)or spectral efficiency(SE)is employed and verified as a better performance metric for CM-FTN than the minimum Euclidian distance(MED).The precoder of CM-FTN is optimized for maximizing the IR criterion using the bare-bones particle swarm optimization(BB-PSO)algorithm.Further,a three-carrier CM-FTN system model is used to capture the broadening effect of precoder.Also targeting for the IR maximization,the inter-symbol interference(ISI)length for CS is optimized to reduce the receiver complexity without performance loss.Simulation results demonstrate that our method has a 0.6dB precoding gain compared with the nonprecoding scheme and a maximum of 87.5%of the complexity of FTN equalizer is reduced without BER loss.

关 键 词：faster-than-Nyquist coded modulation information rate minimum Euclidian distance PRECODER channel shortening 

分 类 号：TN911.3[电子电信—通信与信息系统] TN911.22[电子电信—信息与通信工程]