【摘要】 为了提高雷达检测弱信号的能力 ,对它的去噪就显得非常重要。小波变换具有良好的局部化分析特性和多分辨率分析特性 ,中值滤波具有良好的边缘保持特性。它们都有一定的去噪能力 ,但对弱信号效果不好。提出了基于小波变换与中值滤波器耦合的雷达弱信号去噪方法 ,仿真结果表明 ,经过该方法去噪后弱信号的信噪比有较大提高。更多还原

【Abstract】 In order to improve the power of detecting radar weak signal, the key is to restrain noise of radar weak signal. Wavelets transform have advantages of local analysis and multi resolution analysis. Median filter has good abilities of keeping edge. According to their respective characteristics, this paper put forward a radar weak signal denoising method, which composed wavelet transform and median filter. Simulation results are given to demonstrate that the Signal to Noise of weak signal improved significantly after demised by the method.更多还原