PD雷达识别中的相参性检测和频率测量

Coherence Detection and Frequency Measurement for Recognizing Backscattered Signal of Pulse Doppler Radar

脉冲多普勒雷达 (PD雷达 )广泛应用于机载火控、机载预警等领域。其相参性和载频的高稳定性 ,是PD雷达识别的最重要的两个特征。本文介绍了 PD雷达相参性识别的几种方法 (如 :单信道识别法 ,多信道识别法 ,时域识别法 ) ,同时对时 -频分析算法 (STFT和 WVD)和小波脊线算法在瞬时频率测量中的应用进行了计算机仿真 ,分析和比较了这几种方法的测量效果。

Pulse Doppler radar (PD radar) is widely used in many fields. Coherence and high stability of carrier frequency are two foremost characters of PD radar signal. This paper introduces several algorithms (such as: one-channel recognition, multi-channel recognition, time-field identification) to detect coherence, and application of joint time-frequency analysis algorithms (STFT, wigner-ville distribution, wavelet ridge) in measuring instantaneous frequency are implemented with MATLAB language and their performances are compared in this paper.