Ultra-wideband Radar Clutter Modeling and Simulation Based on Sub-band Synthesis
基于子带合成的超宽带雷达杂波建模与仿真

In this paper, an approach, based on sub-band synthesis and general facet model, is proposed for Ultra- WideBand (UWB) radar ground clutter modeling, simulation and analysis of clutter statistics in the case of different incident angle and relative bandwidth is respectively proposed. Firstly, the facet is divided into a series of small segments (called general facet) according to ground shape; UWB radar work bandwidth is splited into a bank of sub-bands (narrow-bands). The second step is to obtain the individual facet clutter backscattering coefficient (σ0) from the sub-bands. Finally, the method of sub-band synthesis is utilized to get UWB radar ground clutter model. According to clutter simulation, it is found that the UWB radar ground clutter Probability Density Function (PDF) curve varies with the fluctuation of incident angle or relative bandwidth. However, UWB radar PDF curve is characteristic of “low barycenter and fat tail”, furthermore, the tail become more heavy when the relative bandwidth of UWB radar increase. Simulation results show that the method of “frequency splitting and sub-bands synthesis” is feasible.