首页> 外国专利> Radar imaging of a scene in the far field of a radar network one or two dimensional

Radar imaging of a scene in the far field of a radar network one or two dimensional

机译:一维或二维雷达网络远场中的场景的雷达成像

摘要

Procedure radar imaging of a scene in the far field of a network of one-dimensional radars, comprising providing a series of backscatter data D (fm, x'n) of said scene, said data being associated to a backscatter plurality of positions network x'n radars, n = 0 ... N1, N 1, regularly spaced along an axis of said radar network; backscatter data is sampled, for each position of the network x'n radars, at different frequencies fm, m = 0 ... M-1, M 1, defined by fm = fc-B / 2 + m · Mf wherein fc is a center frequency, bandwidth B and Mf one frequency step; calculating an image of radar reflectivity R (am ', 1n') in a system pseudo-coordinates, in which a and coordinates of a point in said scene can be expressed by the equations: wherein p indicates a distance range from a center of the radar network to that point, x indicates a coordinate with respect to said axis, an orthogonal projection of said point on said network dimensional radars, c denotes the speed of light, and Ic wavelength central radar, performing said calculation of said image radar reflectivity R (am ', 1n') based on the following formula: wherein j represents the imaginary unit, FFT2D indicates an operator fast 2D Fourier transform, am ' , m = 0 ... m-1, and n ', n' = 0 ... N-1 represents a regular grid in said pseudo-polar coordinate system, and Pmax is seleccionaº 0 depending on a predefined accuracy to be achieved.
机译:一维雷达网络的远场中场景的过程雷达成像,包括提供所述场景的一系列反向散射数据D(fm,x'n),所述数据与多个反向散射位置网络x相关联n个雷达,n = 0 ... N1,N> 1,沿着所述雷达网络的轴线规则地间隔开;对于网络x'n雷达的每个位置,以不同的频率fm,m = 0 ... M-1,M> 1采样反向散射数据,由fm = fc-B / 2 + m·Mf定义,其中fc是中心频率,带宽B和Mf是一个频率阶跃;在系统伪坐标中计算雷达反射率图像R(am',1n'),其中所述场景中点的a和坐标可以由以下等式表示:其中p表示距该中心点的距离范围到该点的雷达网络,x表示相对于所述轴的坐标,所述点在所述网络尺寸雷达上的正交投影,c表示光速,Ic波长中央雷达,执行所述图像雷达反射率R的计算(am',1n')基于以下公式:其中j表示虚数单位,FFT2D表示算子快速2D傅立叶变换,am',m = 0 ... m-1,n',n'= 0 …N-1表示所述伪极坐标系中的规则网格,并且Pmax是selecciona?0,取决于要实现的预定精度。

著录项

相似文献

  • 专利
  • 外文文献
  • 中文文献
获取专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号