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为了有效分析机载雷达杂波抑制特性和提高目标检测性能。建立了天线行子阵和列子阵的天线发射方向图模型,同时采用空时自适应处理(Space Time Adaptive Processing,STAP)的机载雷达杂波分析方法,根据目标的导向矢量和杂波与噪声的协方差矩阵建立了杂波功率谱的数学模型,选取不同的脉冲重复频率仿真分析了杂波的特征值谱和改善因子以及杂波空时谱。仿真结果表明:低脉冲重复频率和中脉冲重复频率使杂波谱扩散;随着脉冲重复频率的减少,杂波的相关度减少;STAP法适合高脉冲重复频率的情形,为抑制雷达杂波提供了依据。
In order to effectively analyze the clutter suppression characteristics of airborne radar and improve the target detection performance. The antenna pattern of the antenna array and the array antenna array was established. At the same time, the airborne radar clutter analysis method based on space time adaptive processing (STAP) was used. According to the target steering vector, clutter and noise The covariance matrix is used to establish the mathematical model of the clutter power spectrum. The eigenvalue spectrum, the improvement factor and the clutter space-time spectrum of the clutter are simulated by different pulse repetition frequencies. The simulation results show that: low pulse repetition frequency and medium pulse repetition frequency make the clutter spectrum spread; With the decrease of pulse repetition frequency, the clutter correlation decreases; STAP method is suitable for high pulse repetition frequency in accordance with.