基于NFM-BOK波形的低检测概率通信技术  

Low detection probability communication technology based on NFM-BOK waveform

作　　者：孙志国[1] 沙钰彭 宁晓燕[1] SUN Zhiguo;SHA Yupeng;NING Xiaoyan(College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《系统工程与电子技术》2023年第12期4030-4039,共10页Systems Engineering and Electronics

基　　金：国家自然科学基金(61873277);陕西省重点研发计划项目(2020GY-026)资助课题。

摘　　要：针对以直接序列扩频(direct sequence spread spectrum,DSSS)和切普扩频(chirp spread spectrum,CSS)为代表,现有低检测概率(low probability of detection,LPD)通信波形变换域聚敛特征明显、影响LPD性能的问题,以满足误码率(bit error rate,BER)需求的信噪比下通信波形变化域聚敛特征最小化为目标,提出一种新型LPD通信方法——以噪声调频(noise frequency modulation,NFM)为波形基、以二进制正交键控(binary orthogonal keying,BOK)为信息载荷方式的NFM-BOK通信技术。以直接序列——二进制相移键控(direct sequence-binary phase shift keying,DS-BPSK)为对比对象,在给出NFM-BOK通信技术方案的基础上,着重研究了所提NFM-BOK的BER性能、功率谱域和循环相关域内的聚敛特征。理论分析和仿真结果表明:相较于DS-BPSK,NFM-BOK通信系统的抗噪性能相近,相同BER对应的信噪比下的功率谱域和循环相关域内的聚敛特征显著降低。A new low probability of detection(LPD)communication method called noise frequency modulation-binary orthogonal keying(NFM-BOK)is proposed to address the issue of significant convergence characteristics in the communication transform domain of LPD waveforms,such as direct sequence spread spectrum(DSSS)and chirp spread spectrum(CSS),which can significantly affect LPD performance.The goal is to minimize the convergence characteristics in the communication waveform’s transform domain at a given signal-to-noise ratio(SNR)to meet the bit error rate(BER)requirements.The NFM-BOK communication technology uses noise frequency modulation(NFM)as the waveform basis and BOK as the information payload method.The NFM-BOK’s BER performance,power spectrum domain,and cyclic correlation domain convergence characteristics are focused on studying,with direct sequence-binary phase shift keying(DS-BPSK)as a comparison.Theoretical analysis and simulation results show that compared to DS-BPSK,the NFM-BOK communication system has similar noise resistance performance,while the convergence characteristics in the power spectrum domain and cyclic correlation domain at the same SNR corresponding to the same BER are significantly reduced.

关 键 词：低检测概率 噪声调频通信 功率谱检测 循环谱检测 聚敛系数 

分 类 号：TN973.2[电子电信—信号与信息处理]