基于伪随机线性调频的双序列跳频通信系统  

Binary-sequence Frequency Hopping Communication SystemBased on Pseudo-randomLFM

作　　者：唐志强 全厚德 孙慧贤 崔佩璋 TANG Zhi-qiang;QUAN Hou-de;SUN Hui-xian;CUI Pei-zhang(The Army Engineering University of PLA,Shijiazhuang 050003,China;National Key Laboratory of Communication Anti-interference,University of Electronic Science and Technology,Chengdu 611731,China)

机构地区：[1]陆军工程大学石家庄校区,石家庄050003 [2]电子科技大学通信抗干扰国家级重点实验室,成都611731

出　　处：《火力与指挥控制》2020年第7期14-19,共6页Fire Control & Command Control

基　　金：国家自然科学基金(61531009,61471108);国家重大专项基金(2016ZX03001009);河北省自然科学基金资助项目(F2017506006)。

摘　　要：针对双序列跳频(Binary-Sequence Frequency Hopping,BSFH)在对偶信道被干扰的情况下会导致通信瘫痪的缺点,提出了一种基于伪随机线性调频的双序列跳频通信系统。在发送端利用线性调频信号对每一跳载波进行带内扩频,接收端将解跳后的信号作分数阶傅里叶变换,然后通过抽样判决得到发端信息。构建了相应的系统模型,推导了其在跟踪干扰和部分频带干扰下的误码率数学表达式。理论和仿真结果表明:在最坏跟踪干扰下,该系统比BSFH约有5 dB以上的性能增益;在部分频带干扰下,达到相同误码率时所需的信干比,改进方法比BSFH低约4 dB。Binary-sequence frequency hopping communication system based on pseudo-random LFM is proposed for the case that Binary-Sequence Frequency Hopping(BSFH)can cause communication defects when the dual channel is interfered.At the sending end,the LFM signal is used to carry out in-band spread spectrum for each hop carrier wave,and at the receiving end,the hopped signal is taken as fractional Fourier transform,and then the information of the sending end is obtained by sampling decision.Firstly,the corresponding system model is constructed,and the mathematical expression of bit error rate under tracking interference and partial frequency band interference is derived.The theoretical and simulation results show that this system has about 5dB performance gain compared with BSFH under the worst tracking interference.The signal-to-interference ratio required to achieve the same bit error rate,the improved method is about 2 dB lower than that of BSFH under some frequency band interference.

关 键 词：双序列跳频 线性调频 分数阶傅里叶变换 跟踪干扰 部分频带干扰 

分 类 号：TN914.4[电子电信—通信与信息系统]