Velocity Estimation of Moving Target Based on Two-dimensional Projection for LFM UWB Radar
Yang Li-min① Su Wei-min② Gu Hong② Bo Chao②
①(China Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, China) ②(School of Electronic and Optical Engineering, Nanjing University of Science & Technology, Nanjing 210094, China)
Abstract：Two-Dimensional (2D) projection in temporal-Doppler plan is utilized to solve the effects of range-Doppler coupling and Doppler dispersion on radial velocity estimation for Linear Frequency Modulation (LFM) Ultra-WideBand (UWB) radar. First, temporal-Doppler 2D plane is got via 2D Fourier transform in fast-slow time domain. Second, 2D projection is performed to obtain energy focusing in UWB Doppler domain through mapping the UWB signal into narrow signal. Finally, radial velocities of moving targets are obtained according to the Doppler frequencies of the narrow signal after the mapping. This method not only solves the negative impacts of UWB radar Doppler dispersion on velocity estimation, but also voids that energy can not be accumulated in slow time since targets move along range resolution bins. Range profile of targets can also be got via the corresponding compensation with the estimated velocities. Besides, the velocity restriction is further derived according to the corresponding requirements. The simulation results illustrate the effectiveness of this method.
杨利民, 苏卫民, 顾 红, 薄 超. 基于二维映射的LFM UWB 雷达动目标速度估计[J]. 雷达学报, 2012, 1(3): 232-237.
Yang Li-min, Su Wei-min, Gu Hong, Bo Chao. Velocity Estimation of Moving Target Based on Two-dimensional Projection for LFM UWB Radar. JOURNAL OF RADARS, 2012, 1(3): 232-237.
