一种幅相联合调制雷达波形设计与处理方法

Radar waveform design and processing using joint amplitude-phase modulation

摘要:

随着脉内特征识别、信号分选等电子侦察技术的发展，雷达波形设计正面临严峻的挑战。幅度调制作为一种新型脉冲调制方式，能够增加信号时域的复杂性，提升波形的反识别能力。本文提出一种幅相联合编码雷达波形，通过幅度相位联合调制提升雷达波形的复杂度，具有良好的反侦察潜力；利用幅度上的稀疏采样特点，提出匹配滤波与压缩感知相结合的回波信号处理方法处理此信号，有效提升低信噪比条件下的检测概率。最后通过仿真实验证明了所提幅相联合调制雷达波形设计与处理方法的有效性。

Abstract:

Radar waveform design is facing severe challenges with the development of electronic reconnaissance technology such as intra-pulse feature recognition and signal deinterleaving. Amplitude modulation can improve the anti-identification ability of the waveform by increasing the signal complexity in time domain, which is a newly developing modulation method. A novel radar waveform with joint amplitude-phase coding modulation is proposed in this paper. It improves the complexity of radar waveform through Amplitude-Phase Joint Modulation(APJM), which is promising in anti-reconnaissance. In addition, regarding the processing of this signal, an echo signal processing method combining matched filtering and Compressed Sensing(CS) is proposed, which uses the sparse sampling characteristics of amplitude. The proposed signal processing method effectively improves the detection probability under the condition of a low Signal-to-Noise Ratio(SNR). In the end, simulation results show the effectiveness of the proposed waveform design and processing method of the joint amplitude-phase modulation radar waveform.