膛内目标有效信号自动提取方法

雷达回波信号的有效提取是影响后续膛内多普勒信号处理的关键环节，目前内弹道工程应用中通常采用手动截取，该方法的误差较大、精度较低。针对上述问题，提出了一种雷达回波信号的自动提取方法。首先截掉明显的无用噪声部分，然后根据短时傅里叶变换(STFT)时频分析方法结合多普勒原理求出整段信号的速度，并判断出最大速度点作为有效信号的终点，利用改进的多时窗能量比法判定信号的起点。仿真信号及实际信号的实验结果表明，该方法对有效信号起点与终点提取的平均误差为0.1875 μs。

Abstract

The effective extraction of radar echo signal is a key step in the process of Doppler signal processing in interior ballistics. Currently manual interception is usually adopted in the engineering application. The method often causes high error and low precision. Aiming at these problems, an effective method of Doppler signal automatic extraction is proposed. The obvious noise can be intercepted. According to the principle of Doppler, the method uses short-time Fourier transform (STFT) to acquire the velocity of the entire signal. The maximun velocity point is judged as the terminal point for the effective signal. The improved method of multiple-window energy ratio is adopted to determine the starting point. The experimental results through simulated signal and actual signal show that the average error of the method to extract the starting points and terminal points of the effective signal is 0.1875 μs.

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杨梦玲, 苏新彦, 王鉴, 姚金杰. 膛内目标有效信号自动提取方法[J]. 激光与光电子学进展, 2015, 52(9): 092802. Yang Mengling, Su Xinyan, Wang Jian, Yao Jinjie. A Method of Automatic Extraction of Effective Signal of Target in Interior Ballistics[J]. Laser & Optoelectronics Progress, 2015, 52(9): 092802.

膛内目标有效信号自动提取方法

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