基于迭代判决反馈的移动短波信道频域均衡技术  

Frequency-domain Equalization Technique for Mobile HF Channel Based on Iterative Decision Feedback

作　　者：刘洵 李国军 刘驰[2] LIU Xun;LI Guojun;LIU Chi(School of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Lab of Beyond Line of Sight Reliable Information Transmission,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065 [2]重庆邮电大学超视距可信信息传输研究所,重庆400065

出　　处：《无线电工程》2024年第11期2649-2656,共8页Radio Engineering

基　　金：国家自然科学基金重点项目(U22A2006);重庆市自然科学基金(cstc2021ycjh-bgzxm0072,CSTB2023NS CQ-LZX0082)。

摘　　要：在高速移动短波信道下信号多径干扰严重且机动平台能量十分受限,针对多载波技术的高峰均功率比以及高复杂度所引起的高功耗等缺陷,提出了一种基于迭代块判决反馈均衡(Iterative Block Decision Feedback Equalization,IBDFE)的新型单载波频域均衡(Single Carrier Frequency-Domain Equalization,SC-FDE)技术。与传统的迭代块判决反馈频域均衡结构不同,其特点是采用双重IBDFE结构,其中一路信号的输出作为反馈滤波器的输入,并引入残余码间干扰消除(Residual Inter-Symbol Interference Cancellation,RISIC)技术。仿真结果表明,在相同的移动短波信道场景下,与传统结构算法相比,复杂度相近,但误码性能更好,通信系统可靠性更强。SC-FDE技术相比于多载波技术,功耗较低,更加适用于对能量有一定要求的机动平台短波地空通信。For highly mobile HF channels,there exist serious multi-path interferences and the mobile platform has limited energy.A Novel Single Carrier Frequency-Domain Equalization(SC-FDE)technique based on Iterative Block Decision Feedback Equalization(IBDFE)is proposed to solve the problem of high-power consumption caused by the high peak to average power ratio and complexity of multi-carrier technology,which is used in mobile HF communication systems.Different from the traditional iterative block decision feedback frequency-domain equalization structure,the proposed technique adopts dual IBDFE structure,in which the output of one signal is used as the input of the feedback filter,and Residual Inter-Symbol Interference Cancellation(RISIC)is introduced.The simulation results show that in the same mobile HF channel scenario,compared with the traditional structural algorithm,the complexity is similar,but the error performance is better,and the reliability of the communication system is stronger.Compared with multi-carrier technology,SC-FDE technology has lower power consumption and is more suitable for HF ground-to-air communication of mobile platforms with certain requirements for energy.

关 键 词：移动短波通信 迭代判决反馈 频域均衡 无线通信 

分 类 号：TN925[电子电信—通信与信息系统]