一种降低新型OFDM数据链误码率的方法  

A way of decreasing the reliability of new OFDM data link

作　　者：苏宇航 陈朝[1] 翟鄀 竟诗琦 Su Yuhang;Chen Zhao;Zhai Nuo;Jing Shiqi(School of Mechanical and Electronic Information,China University of Geosciences Wuhan,Wuhan 430000,China)

机构地区：[1]中国地质大学(武汉)机械与电子信息学院,湖北武汉430000

出　　处：《电子技术应用》2021年第3期44-50,共7页Application of Electronic Technique

基　　金：装备预研教育部联合基金项目(20180700501)。

摘　　要：针对空地雷达数据链可靠性的问题,基于单向耦合映像格子模型,提出了基于OCML的新型OFDM数据链模型。上述模型通过利用OCML时空混沌序列对CCSK软扩频进行改进,同时结合编码技术以及调制技术进行仿真。仿真分析显示,基于OCML的新型OFDM数据链模型可以有效改善CCSK中伪随机序列由于自相关性差导致的可靠性差等问题,显著提高系统误比特率性能,且有效提高空地雷达数据链的可靠性。A new OFDM data link model based on OCML is proposed to solve the problem of reliability of data link of air-to-ground radar.The above model uses OCML spatiotemporal chaotic sequence to improve CCSK soft spread spectrum,and simulates with coding and modulation techniques.Simulation analysis shows that the new OFDM data link model based on OCML can effectively improve the reliability of pseudorandom sequences in CCSK due to poor autocorrelation,significantly improve the bit error rate of the system and effectively improve the reliability of air-to-ground radar data chain.

关 键 词：空地雷达数据链 RS编码 CCSK软扩频 单向耦合映像格子 OFDM 

分 类 号：TN95[电子电信—信号与信息处理]