【摘要】 根据有效信号在相邻道之间在波形和能量上有相关性这一特点,作者改进了常规KL变换只能提取水平相关信号的不足,使用小波域上的KL变换对探地雷达剖面进行滤波,不仅使倾斜轴和弯曲轴的到了加强,而且在低信噪比时,有效地区分出有效信号和干扰信号,提高了雷达剖面的分辨率.本文运用铁路沪宁线路基检测的数据,使用该方法滤波,其处理后的剖面更能有效地反映出路基病害的信息.更多还原

【Abstract】 Based on characteristic of relevance of wave form and energy of effective signal among neighbouring traces,the author fills up the deficiency in extraction of horizontal coherent signal with traditional KL transform and uses KL transform in wavelet domain to filter GPR data.Not only are axis of tilt and bending axis intensified,but also signal is effectively distinguished from interference signal whe signal-to-noise ratio is low.So the resolution of GPR plot is improved.After the GPR data from exploration of Shanghai-Nanjing railway subgrade is filtered with the method mentioned above,it is easier for the GPR plot based on it to reflect the subgrade problems.更多还原