步进频率随机变化的2FSK-步进频雷达通信一体化波形设计  

2FSK-Stepped Frequency Radar Communication Integrated Waveform Design with Random Variation of Step Frequency

作　　者：马启成 MA Qicheng(Naval University of Engineering,Wuhan Hubei 430032,China)

机构地区：[1]海军工程大学,湖北武汉430032

出　　处：《通信技术》2021年第3期534-544,共11页Communications Technology

基　　金：国家自然科学基金“多功能数字阵列雷达资源调度技术研究”(No.61501486)。

摘　　要：在高分辨雷达信号中,频率步进雷达信号是一种可靠且高效的雷达信号。一般情况下,雷达波形采用低占空比的脉冲传输。为了提高通信传输速率,通信波形往往采用连续波传输。针对雷达通信一体化信号中通信传输速率低下的问题,提出了一种结合步进频率信号和通信中多频移键控(Multi-Frequency Shift Keying,MFSK)调制的雷达通信一体化共享信号。首先,基于多频移键控(MFSK)调制方法建立了步进频-MFSK雷达通信一体化信号模型。然后推导了信号的模糊函数与频率步进脉冲序列时域和频域中的主峰,分析了携带通信信息对雷达距离和速度分辨率性能的影响。雷达模糊函数仿真结果表明,随机的通信信息对频域步进脉冲序列无影响,但是其对时域的步进脉冲序列有负面的随机影响。Among high-resolution radar signals, the frequency stepped radar signal is a reliable and efficient radar signal. Under normal circumstances, radar waveforms are transmitted in pulses with low duty cycles. In order to increase the communication transmission rate, the communication waveform often adopts continuous wave transmission. Aiming at the problem of low communication transmission rate in the integrated radar communication signal, this paper proposes a radar communication integrated shared signal combining stepped frequency signal and Multi-Frequency Shift Keying(MFSK) modulation in communication. First of all, based on the MFSK modulation method, a stepped frequency-MFSK radar communication integrated signal model is established. Then, the ambiguity function of the signal and the main peaks in the time domain and frequency domain of the frequency stepped pulse sequence are derived, and the influence of carrying communication information on the radar range and speed resolution performance is analyzed. The simulation results of the radar ambiguity function indicate that the random communication information has no effect on the frequency domain step pulse sequence, but it has a negative random effect on the time domain step pulse sequence.

关 键 词：雷达通信一体化 步进频-MFSK 多进制频移键控 波形设计 模糊函数 误码率 

分 类 号：TN956.8[电子电信—信号与信息处理]