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探测强杂波中的动目标,采用高脉冲重复频率脉冲多卜勒方式是非常有效的。本文介绍在这种雷达方式中,在发射脉冲对活动目标照射脉冲数(与天线波束扫描速度有关)增加时,为了不使系统的构成过于复杂,又能有效地利用接收数据,改善信号检测能力,而在信号处理部分采用FFT处理机,各滤波器的输出进行平方,并对每个FFT运算结果进行积累处理的情况。文中对与输出噪声的统计分布、虚警概率以及与目标信号检测概率有关的理论问题,进行了探讨。由实验装置得到的实验结果与理论值非常一致,定量地说明了这种信号处理方法对提高雷达系统的检测能力是有效的。
It is very effective to detect the moving target in strong clutter by using Doppler pulse with high pulse repetition frequency. In this radar system, when the number of transmitted pulses (which is related to the antenna beam scanning speed) increases with the number of active target pulses, in order not to overcompose the system and to effectively utilize the received data to improve the signal detection capability , And the FFT processor is used in the signal processing section, the output of each filter is squared, and the result of each FFT operation is accumulated and processed. In this paper, the statistical distribution of output noise, the false alarm probability and the theoretical problems related to the probability of signal detection are discussed. Experimental results obtained by the experimental device and the theoretical value is very consistent, quantitatively shows that this signal processing method to improve the detection capability of the radar system is effective.