基于伪随机线性调频的双序列跳频通信方法  

Binary-sequence frequency hopping communication method based on pseudo-random linear frequency modulation

作　　者：全厚德 唐志强 孙慧贤 崔佩璋 QUAN Houde;TANG Zhiqiang;SUN Huixian;CUI Peizhang(Department of Electronic and Optical Engineering,The Army Engineering University of PLA,Shijiazhuang 050003,China;National Key Laboratory of Science and Technology on Communication,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]陆军工程大学石家庄校区电子与光学工程系,河北石家庄050003 [2]电子科技大学通信抗干扰国家级重点实验室,四川成都611731

出　　处：《华中科技大学学报（自然科学版）》2019年第11期30-36,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

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

摘　　要：为解决双序列跳频在对偶信道被干扰时误码率较高的问题,提出一种基于伪随机线性调频(LFM)的双序列跳频(PRLFM_BSFH)通信方法.在发送端,将线性调频信号作为特征信息与双序列跳频信号混频后通过射频(RF)前端发射出去;在接收端,将接收信号解跳后采用分数阶傅里叶变换进行处理,然后经过抽样判决得到发送端信息.构建了基于伪随机线性调频的双序列跳频通信系统模型,推导了其在瑞利信道下抗跟踪干扰和部分频带干扰的误码率(BER)表达式,并对理论分析进行仿真验证.结果表明:该通信方法的抗干扰性能优于双序列跳频,在不同干扰参数设置下,均有至少5 dB以上的性能增益.In order to solve the problem that the binary-sequence frequency hopping has a high bit error rate when the dual channel is interfered,a binary-sequence frequency hopping communication method based on pseudo-random liner frequency modulation(PRLFM_BSFH) was proposed.At the transmitting end,the liner frequency modulation(LFM) signal as characteristic information was mixed with the binary sequence hopping signal and transmited through the radio frequency(RF) front end.At the receiving end,the received signal was dehopped and processed by fractional Fourier transform,and then the transmitting end data was obtained by sampling decision.A binary-sequence frequency hopping system model based on pseudo-random LFM was constructed.The anti-follower jamming and partial band jamming bit error rate(BER) expressions were derived under Rayleigh channel,and the theoretical analysis was verified by simulation.Results show that the anti-jamming performance of the proposed communication method is better than the binary-sequence frequency hopping,and the performance gains are all larger than 5 dB under different jamming parameters.

关 键 词：双序列跳频 线性调频(LFM) 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]