二维物理小波标架去除探地雷达信号随机噪声

摘要

Ground penetrating radar is applied to detect objectives inside the medium. As there are various interferences and noises in the receipt signal and the reflected wave of the objective tends to be relatively weak so that may be submerged by interferences and noi- ses, it is difficult against data processing and interpretation for ground penetrating radar. And for this reason, eliminating random noise interference turns into a key technology using ground penetrating radar to identify shallow objective. While gives an detailed introduction on the structure and property of 2-D physical wavelet function, this paper also compares the properties of wavelet function which transforms along with the scale, verifies the correctness of the procedures through decomposition and reconstruction of typical signal, provids implementation flow chart concerning threshold de-noising of 2-D physical wavelet frame, carries out de-noising processing through two typical signals, and testifies the effectiveness of this method.%探地雷达是对媒质内部的目标进行探测，接收信号中存在多种干扰与噪声，而目标反射回波信号往往较弱，甚至可能掩没于干扰与噪声中，这给探地雷达数据的处理与解译造成了很大的障碍。因此，去除随机噪声干扰是利用探地雷达进行浅层目标识别的关键技术。介绍了二维物理小波函数的构造及特性，比较了小波函数随尺度变化的特性，利用典型信号的分解与重构验证了程序的正确性，给出了二维物理小波标架阈值去噪的实现过程，并用两个典型信号进行了去噪处理，证明了该方法的有效性。