摘要
电离层的不同传播模式是导致短波数字通信出现码间串扰的主要原因,为克服码间串扰,本文提出一种基于误差传递的短波信道均衡方法,并以青岛-长春链路为例进行了数值仿真和天波试验.数值仿真和空间链路试验表明,与非线性数据定向均衡方法相比,本文方法得到的信息符号的误差方差降低了约50%,而且在低信噪比情况下更有优势.
Different ionosphere propagation modes are the main causes of the inter-symbol interference(ISI)for high frequency(HF)digital communication.In order to overcome ISI,an HF channel equalization method based on error propagation is proposed in this paper,moreover,mathematical expressions and realization steps are given.Digital simulation and HF link experiments show that information symbol error variance of our method is lower 50%than that of nonlinear data directed equalization(NDDE),and our method has advantages in low signal to noise(SNR).
作者
吴永宏
徐伯禹
董雪
金珠
曹倩
WU Yonghong;XU Boyu;DONG Xue;JIN Zhu;CAO Qian(China Research Institute of Radiowave Propagation,Qingdao 266071,China;Pilot National Laboratory for Marine Science and Technology,Qingdao 266235,China)
出处
《电波科学学报》
CSCD
北大核心
2022年第5期831-836,共6页
Chinese Journal of Radio Science
基金
山东省支持青岛海洋科学与技术试点国家实验室重大科技专项(2018SDKJ0210)。
关键词
误差传递
短波信道均衡
多径时延
电离层传播
码间串扰
error propagation
HF channel equalization
multipath delay
ionosphere propagation
inter-symbol interference
