Chirp-DS-BPSK雷达通信一体化波形设计  

Waveform Design for Chirp-DS-BPSK Radar Communication Integration

作　　者：任治民 唐高明 刘宇宏[1] 张守耀 赵珺初 REN Zhimin;TANG Gaoming;LIU Yuhong;ZHANG Shouyao;ZHAO Junchu(Shanghai Spaceflight Institute of TT&C and Telecommunication,Shanghai 201109,China)

机构地区：[1]上海航天测控通信研究所,上海201109

出　　处：《通信技术》2024年第8期783-792,共10页Communications Technology

摘　　要：针对线性调频-二进制相移键控(Chirp-Binary Phase Shift Keying,Chirp-BPSK)雷达通信一体化信号存在模糊函数受通信数据严重影响的问题,分析了传统周期扩频、混沌序列扩频及Logistic映射混沌序列的自相关性能,设计了一种扩频信号与线性调频脉冲相结合的雷达通信一体化共用波形,即Chirp-DS-BPSK一体化信号。该一体化波形分别采用混沌序列和BPSK方式对通信数据进行直接序列扩频与调制,以线性调频信号作为载波,并采用脉冲成型滤波器来提高频谱利用率,降低脉压旁瓣。最后,通过仿真分析证明了所提波形具有良好的模糊函数特性和误码率性能。在扩频比为7的条件下,与传统的Chirp-BPSK波形相比,Chirp-DS-BPSK波形的脉压峰值旁瓣比降低了约2.69 dB,通信误码率下降约8.45 dB,表明Chirp-DS-BPSK比Chirp-BPSK更适合作为雷达通信一体化共用波形。To address the problem that the ambiguity function of the Chirp-BPSK(Chirp-Binary Phase Shift Keying) radar communication integrated signal is seriously affected by the communication data,this paper analyzes the autocorrelation performance of conventional periodic spread spectrum,chaotic sequence spread spectrum and Logistic mapping chaotic sequence,designs a radar communication integrated shared waveform combining spread spectrum signal and chirp pulse,named Chirp-DS-BPSK integrated signal.The integrated waveform uses chaotic sequence and BPSK to directly spread the frequency and modulate the communication data,respectively,and the linear frequency modulation signals are used as carriers,and the pulse shaping filters are used to improve spectral efficiency and reduce the pulse compression peak-to-side lobe ratio.Finally,the simulation analysis proves that the proposed waveform has good ambiguity function characteristics and bit error rate performance:under the condition of spread spectrum ratio of 7,compared with the conventional Chirp-BPSK waveform,the pulse compression peak-to-side lobe ratio of Chirp-DSBPSK waveform is reduced by about 2.69 dB,and the communication bit error rate is reduced by about 8.45dB,indicating that Chirp-DS-BPSK is more suitable to be used as a radar communication integrated shared waveform than the Chirp-BPSK.

关 键 词：雷达通信一体化 共用波形 直接序列扩频 线性调频 雷达信号模糊函数 

分 类 号：TN957.51[电子电信—信号与信息处理]