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本文介绍一种雷达多普勒滤波器组改善因子的计算机模拟方法。用查表法快速产生的独立正态随机数列模拟雷达热噪声;用低阶递推型高斯数字滤波器产生的具有高斯频谱的正态随机数列模拟雷达杂波。对这些随机数列进行了统计检验、相关分析和谱分析,它们的产生速度快,精度好。文中给出了部分模拟结果,并讨论了模-数变换器字长、FFT点数、频域加权等对三脉冲对消器级连FFT系统改善因子的影响。
This paper presents a computer simulation of a radar Doppler filter bank improvement factor. An independent normal random number sequence generated by the look-up table method is used to simulate the thermal noise of the radar. A normal random sequence with Gaussian spectrum generated by the low-order recursive Gaussian digital filter is used to simulate the radar clutter. Statistical tests, correlation analysis and spectrum analysis are performed on these random numbers, which are fast and accurate. Part of the simulation results are given in the paper, and the effects of ADC word length, FFT points and frequency domain weighting on the cascaded FFT system improvement factors of three-pulse canceller are discussed.