复杂信道中的多载波并行组合扩频通信技术研究  

Research on Multi Carrier Parallel Combined Spread Spectrum Communication Technology in Complex Channel

作　　者：丁杰 丁丹 王志强 胡博仁 DING Jie;DING Dan;WANG Zhiqiang;HU Boren(Graduate School,Space Engineering University,Beijing 101416,China;Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China)

机构地区：[1]航天工程大学研究生院,北京101416 [2]航天工程大学电子与光学工程系,北京101416

出　　处：《火力与指挥控制》2023年第4期108-116,共9页Fire Control & Command Control

摘　　要：为了提高并行组合扩频的频带利用率和信息传输速率,提出差分多相多载波并行组合扩频(DMP-PCSS-OFDM)通信系统、位置码多载波并行组合扩频(PC-PCSS-OFDM)通信系统、差分多相位置码多载波并行组合扩频(DMP-PC-PCSS-OFDM)通信系统,并对其进行建模。将发送端的输出信号通过加性高斯白噪声(AWGN),多径效应和电磁干扰的复杂信道环境,在接收端对接收信号的误码率性能进行仿真分析,并与同条件的单载波通信系统作出对比。在MATLAB中仿真显示,几种多载波并行组合扩频通信系统(MC-PCSS)在AWGN,多径效应以及单音干扰的信道环境中误码率普遍低于其对应的单载波并行组合扩频通信系统(SC-PCSS);但对于多音干扰,随着干扰频点的不断增加,SC-PCSS的系统性能逐渐好转,甚至超过MC-PCSS。In order to improve the frequency band utilization rate and information transmission rate of parallel combined spread spectrum,differential multiphase multi carrier parallel combined spread spectrum(DMP-PCSS-OFDM)communication system,position code multi carrier parallel combined spread spectrum(PC-PCSS-OFDM)communication system and differential multiphase coded multi carrier parallel combined spread spectrum(DMP-PC-PCSS-OFDM)communication system are proposed and modeled.Through the complex channel environment of additive white Gaussian noise(AWGN),multipath effect and electromagnetic interference,the error rate of the receipt signal at the receiving terminal is simulated and analyzed by the output signal at the transmitting terminal and compared with the single carrier communication system under the same conditions.The simulation in MATLAB shows that the error rate of several kinds of multi carrier parallel combined spread spectrum communication systems(MC-PCSS)is generally lower than that of its corresponding single carrier parallel combined spread spectrum communication system(SC-PCSS)in the channel environment of AWGN,multipath effect and single tone interference;However,for multi tone interference,with the continuous increase of interference frequency points,the system performance of SC-PCSS gradually improves and even exceeds that of MC-PCSS.

关 键 词：并行组合扩频 正交频分复用 频带利用率 时变多径信道 电磁干扰 

分 类 号：TN929.5[电子电信—通信与信息系统]