压制干扰对短周期序列扩频通信解调性能的影响分析  

Performance analysis of suppressing jamming on the demodulation performance of spread spectrum communication with short period sequences

作　　者：卢洽然 何方敏 王泽 杨忠 张雲硕 李亚星 LU Qiaran;HE Fangmin;WANG Ze;YANG Zhong;ZHANG Yunshuo;LI Yaxing(National Key Laboratory for Electromagnetic Energy,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学电磁能技术全国重点实验室,湖北武汉430033

出　　处：《华中科技大学学报(自然科学版)》2025年第3期70-77,共8页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家重点研发计划首席科学家负责制试点项目(2021YFF1500100);国家自然科学基金资助项目(52177012);国家杰出青年科学基金资助项目(52025072);国防科技重点实验室基金资助项目(614221722051301);湖北省自然科学基金资助项目(2021BIDS007)。

摘　　要：重点研究了压制干扰对短周期序列扩频通信解调性能的影响,推导了压制干扰下短周期序列扩频通信非相干解调/扩的数学表达式,在此基础上设计了一种基于最大匹配度量判决准则的误码率统计模型,定量分析了多音干扰条件下短周期序列扩频通信的误码率性能.仿真结果表明:提出的误码率统计模型分析短周期序列扩频通信误码率时,相较于传统长周期序列模型具有更高的精确度,分析长周期序列扩频通信误码率时能够与传统模型的结果保持一致.同时验证了干扰信号中心频率瞄准通信信号载波频率时干扰效果最好.The influence of suppressing jamming on the demodulation performance of the short period sequence spread spectrum communication(SPS-SSC) system was analyzed.The mathematical expression of the incoherent demodulation of SPS-SSC signals under suppressing jamming was derived.On this basis,the bit error ratio(BER) statistical model based on maximum matching metric decision criterion was proposed to quantitatively analyze of the BER performance of SPS-SSC systems under suppressing jamming.The simulation results show that the proposed BER statistical model in this paper has higher accuracy in analyzing the BER performance of SPS-SSC system compared with conventional long period sequence(LPS) based BER model,and is consistent with the conventional LPS based BER model in analyzing LPS-SSC systems.Simulation results also verify that suppressing jamming obtains optimal jamming performance when the center frequency of the jamming signal equals to the carrier frequency of the desired signal.

关 键 词：压制干扰 短周期序列扩频通信 非相干解扩 最大匹配度量判决准则 误码率 信干比 

分 类 号：TN929.52[电子电信—通信与信息系统]