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针对低空风切变的检测问题,提出了一种基于机载风切变雷达回波信号的双峰谱参数模型,利用该模型对回波信号频谱进行拟合分析,省略了预滤杂波处理环节,可以直接对风切变目标进行探测。该模型中的两个参数,平均风速和方差,是风切变现象的两个特征参数;把双峰谱频谱模型同风切变雷达回波仿真频谱作了仿真和对比分析,提取出风速等参数;结果表明,双峰谱模型较好地拟合了回波信号频谱,证实了双峰谱模型的有效性,在低空风切变雷达中有一定的应用前景。
Aiming at the detection problem of low-level wind shear, a bimodal spectrum parameter model based on echo signal of airborne wind shear radar was proposed. By using this model, the spectrum of echo signal was fitted and analyzed, and the pre-filter clutter was omitted Links, you can directly target the wind shear detection. The two parameters in the model, mean wind speed and variance, are two characteristic parameters of wind shear phenomena. Simulation and comparison analysis of bimodal spectrum model and wind shear radar echo simulation spectrum are carried out, and the wind speed and so on are extracted The results show that the bimodal spectrum model fits well the spectrum of the echo signal, confirms the validity of the bimodal spectrum model and has certain application prospect in the low-altitude wind-shear radar.