三频段准连续波雷达信号目标检测性能分析

Radar Signal Processing for Three Frequency Ranges Quasi-continuous Waveform

准连续波雷达是一种低截获概率雷达,结合了脉冲雷达收发隔离和连续波雷达截获概率低的优点,但其检测性能的优劣很大程度依赖于信号形式,普通的编码信号和线性调频信号已经不能满足其对目标探测的要求。为解决这个问题,设计了一种三频段信号和与之相应的收发系统,对系统结构及三频段信号的参数选择原则、目标检测原理、模糊函数、抗近距离盲区性能做了详细分析,并指出了三频段信号相对于相位编码信号和分时发射信号的优势所在,最后通过仿真证明,将三频段信号应用于准连续波体制雷达中时能准确探测目标,得到目标的各个参数并且能有效消除近距离盲区。

A low probability of intercept（LPI） radar, quasi-continuous wave radar integrates the advanta-ges of transceiver isolation of pulse radars and low LPI of continuous wave radars, but its detection per-formance largely depends on the signal form. Ordinary coded signal and LFM signal can not satisfy the re-quirement for target detection, so a three frequency ranges signal and the corresponding transceiver system are designed. The system structure and the parameter selection principle of three frequency ranges signal, target detection principle, fuzzy function, close-blind area resistance are analyzed in detail, and the supe- riority of three frequency ranges signal relative to the phase coded signal and time-sharing signal is pointed out. Simulation demonstrates that the performance of target detection is improved and close-blind area is e-liminated, when three frequency ranges signal is applied to the quasi-continuous wave radar system.