Synthetic UWB Range Profile Using SFPTs and Class MUSIC for High-resolution Velocity Estimation  

作　　者：YANG Limin SU Weimin GU Hong GENG Runtong 

机构地区：[1]Department of Electronic Engineering,Nanjing University of Science and Technology,Nanjing 210094,China

出　　处：《Chinese Journal of Aeronautics》2012年第1期103-108,共6页中国航空学报（英文版）

摘　　要：A method, called class multiple signal classification （CMUSIC）, is proposed to estimate high-resolution radial velocity in each pulse train （subband, i.e. narrowband） with M pulses based on stepped frequency pulse trains （SFPTs） signal. A synthetic ultra-wideband （UWB） high-resolution range profile （HRRP） is then obtained by fast Fourier transform （FFT） processing along the subbands after compensating the range-Doppler coupling and Doppler dispersion with the estimated velocity. Compared with the other methods, CMUSIC has fine performance of velocity estimation at low signal-to-noise ratio （SNR） level. This method also has excellent performance with small Mas long as the requirement, i.e. Mis large than Q, is able to be fulfilled, where Q is the number of targets with different radial velocities. In addition, through a radial velocity resolving, the method can be well suitable for targets moving at high radial velocities, which has significant practical value with considerable progress made in the national defence technology and the advanced vehicles moving at high speed springing up. Simulation results demonstrate the feasibility and effectiveness of the method.A method, called class multiple signal classification （CMUSIC）, is proposed to estimate high-resolution radial velocity in each pulse train （subband, i.e. narrowband） with M pulses based on stepped frequency pulse trains （SFPTs） signal. A synthetic ultra-wideband （UWB） high-resolution range profile （HRRP） is then obtained by fast Fourier transform （FFT） processing along the subbands after compensating the range-Doppler coupling and Doppler dispersion with the estimated velocity. Compared with the other methods, CMUSIC has fine performance of velocity estimation at low signal-to-noise ratio （SNR） level. This method also has excellent performance with small Mas long as the requirement, i.e. Mis large than Q, is able to be fulfilled, where Q is the number of targets with different radial velocities. In addition, through a radial velocity resolving, the method can be well suitable for targets moving at high radial velocities, which has significant practical value with considerable progress made in the national defence technology and the advanced vehicles moving at high speed springing up. Simulation results demonstrate the feasibility and effectiveness of the method.

关 键 词：synthetic HRRP SFPTs CMUSIC range-Doppler coupling ambiguity resolution 

分 类 号：TN957.52[电子电信—信号与信息处理] TM921.51[电子电信—信息与通信工程]