摘要
超短波电台数据通信传输频带较窄,易受到各类干扰的影响造成信号衰减严重。论文利用Simulink建立跳扩(DS/FH)模式下电台的仿真模型以及宽带干扰、部分频带干扰和多音干扰模型,并在不同干扰下通过改变系统扩频增益、部分频带占频比、多音干扰功率等参量,对比研究了基于卷积编码与RS编码的TCM-8PSK的抗干扰性能,依据仿真绘制的误码率特性曲线,看出基于卷积编码的抗干扰性能优于RS编码的TCM-8PSK系统,因此为提高电台传输系统的抗干扰能力,采用了基于卷积编码的TCM-8PSK技术。另外还得出在跳扩模式下基于两种编码的系统均是抗多音干扰性能最弱、抗宽带和部分频带干扰能力较强的结论。
The data communication transmission band of ultrashort wave radio station is relatively narrow,which is easily af⁃fected by various kinds of interferences and causes serious signal attenuation.In this paper,Simulink is used to establish the simu⁃lation model of radio station in DS/FH mode and the models of wideband interference,partial band interference and multi-tone inter⁃ference.Under different interferences,the anti-interference performance of TCM-8PSK based on convolutional coding and RS cod⁃ing is compared and studied by changing the parameters of system spread spectrum gain,partial band to frequency ratio and multi-tone interference power.According to the error rate characteristic curve drawn by simulation,it can be seen that the anti-in⁃terference performance based on convolutional coding is better than that of TCM-8PSK system based on RS coding.In order to im⁃prove the anti-interference ability of radio transmission system,TCM-8PSK technology based on convolutional coding is adopted.At the same time,it can be concluded that the system based on both codes has the weakest anti-multi-tone interference perfor⁃mance and strong anti-wideband and partial band interference capability in the skip spread mode.
作者
章小梅
刘家昊
曹竟之
ZHANG Xiaomei;LIU Jiahao;CAO Jingzhi(Qingdao Campus,Naval Aviation University,Qingdao 266041)
出处
《舰船电子工程》
2020年第8期70-72,97,共4页
Ship Electronic Engineering
