Patent ID: 8872697
Filing Date: 2014-10-28
Classification: G01S

Abstract:
1. A method of reconstructing collected data acquired in a three dimensional cylindrical radar scan geometry in which targets are considered to be at near field distances and where the scan planes are defined along a z axis, scan locations are arranged in a circular pattern with a radius R at each plane, an irradiating antenna is facing towards a center of each scan plane, and a waveform f(t) with a prescribed bandwidth is sequentially radiated from each scan location, the method comprising: expressing a received signal from each scan location (R, θ, z) as: where νis the propagation speed, σ q and (r p , φ q , z p ) are the reflectivity and location of the q th target and calculating a Fourier transform along the t, z and θ directions of said received signal; applying a filter such that a resulting compensated dataset U(ω, ∈, k where ∈ and k z are the spatial frequency counterparts of θ and z respectively and ξ(ω, ∈, k z ) is the spectrum amplitude component in the (ω, ∈, k z ) frequency space; applying a mapping function to the resulting compensated dataset to produce a sampled frequency space denoted as I(k interpolating values of I(k calculating a three dimensional inverse Fourier transform of I(k