短波宽带波形迭代均衡技术  

Turbo Equalization for Wideband HF Waveforms

作　　者：谢枭 胡飞[1] 周军[1] 康弘俊[1] 

机构地区：[1]西南通信研究所,四川成都610041

出　　处：《通信技术》2015年第5期524-529,共6页Communications Technology

基　　金：国防科技重点实验室基金项目(No.9140C02010814C02006)~~

摘　　要：短波宽带波形是现代短波通信的最新研究成果,短波信道时变多径传播效应会产生严重的码间干扰(ISI),必须采用均衡技术消除ISI。迭代均衡技术(Turbo均衡)将信号检测技术和译码技术结合起来,比传统判决反馈均衡(DFE)技术具有更强抗ISI能力。研究了短波宽带波形Turbo均衡技术,提出了一种低复杂度的迭代检测方法用于短波宽带波形,仿真结果表明,在短波差信道条件下,Turbo均衡比DFE均衡的性能增益超过1.5 d B。Wideband HF（ High-Frequency） waveform is the latest research achievement of modern HF communication. Time-varying multi-path propagation of HF channel would result in high ISI（ Inter-Symbol Interference）,and this ISI must be eliminated by equalization technique. Iterative equalization technique（ turbo equalization）,in combination of signal detecting technique and decoding technique,enjoys a stronger ability of resisting ISI than traditional DFE（ Decision Feedback Equalization） technique.This paper discusses the equalization technique for wideband HF waveform,proposes a low-complexity iterative detection method for wideband HF waveform. Simulation results show that the performance gain of turbo equalization is 1. 5d B over that of DFE equalization in CCIR-Poor channel.

关 键 词：短波宽带波形 TURBO均衡 软输入软输出 对数似然比 

分 类 号：TN911[电子电信—通信与信息系统]