双峰谱模型在风切变雷达目标检测中的应用  

Application of Bimodal Spectral Model in Detection of Wind-shear

作　　者：张宇一[1] 李勇[1] 程宇峰[2] 

机构地区：[1]西北工业大学电子信息学院机载电子综合信息系统创新实验室,陕西西安710129 [2]中航工业雷达与电子设备研究院,江苏无锡214063

出　　处：《计算机测量与控制》2011年第7期1636-1638,共3页Computer Measurement &Control

基　　金：航空科学基金(20081353009)

摘　　要：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。A bimodal parametric spectral model of the received signal from airborne wind-shear radar in presence of wind-shear is proposed to detect low-level wind-shear.This parametric model can be used for the detection of wind-shear by analyzing of radar echo data without the application of a clutter rejection pre-filter.Two parameters of the bimodal model are closely related to mean and variance of wind velocity associated to the wind-shear.The original spectrum and the fitting spectrum which adopt the bimodal parametric spectral model of radar received signal is compared,and the parameters such as wind velocity are Abstracted,simulation results shows that the fitting spectrum are close to the actual situation,which confirm the efficiency of the bimodal parametric spectral model.This method will have a certain application prospects in the low-level wind-shear radar.

关 键 词：风切变 双峰谱参数模型 雷达目标检测 

分 类 号：TH873.7[机械工程—仪器科学与技术]