Fast communication: High-resolution velocity estimation and range profile analysis of moving target for pulse LFM UWB radar

Authors:
Limin Yang;Weimin Su;Hong Gu;Runtong Geng
Affiliations:
Department of Electronic Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China;Department of Electronic Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China;Department of Electronic Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China;Department of Electronic Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China
Venue:
Signal Processing
Year:
2011

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Abstract

A high-resolution estimation of velocity and range profile (HREVRP) method is studied to yield both high-resolution radial velocity and range profile of slowly moving target for pulse linear frequency modulation (LFM) ultra-wideband (UWB) radar. Two-dimensional projection discrete Fourier transform (2-DPDFT) is utilized to estimate the velocity. The range profile is then obtained by compensating its motion and spread with this velocity estimate. In addition, a range of the velocities is derived based on velocity ambiguity and corresponding phase restriction. The proposed method does not require any initial velocity estimation and focusing matrices construction. Besides, it has superior performance of velocity estimation compared with conventional techniques, especially at low signal-to-noise ratio (SNR) levels. The simulations validate the effectiveness of the method.