关于探地雷达对地下目标信号优化检测研究

发布时间：2018-05-06 07:17

本文选题：探地雷达 + 时频聚集度　；参考：《计算机仿真》2017年05期

【摘要】：在探地雷达信号处理中,图像的分辨率对探地雷达的数据分析有着重要影响。由于探地雷达发射的电磁波在地下传播的过程中会受到各种噪声的干扰,使得探地雷达对一些微弱信号的探测效果不明显,而传统的时频分析方法也难以检测出这些微弱信号。针对上述问题,提出了一种新的最优广义S变换。新的最优广义S变换引入了两个参数对时窗的形状和大小进行调节,并且通过能量集中度准则对参数进行优化,以提高时频分布的分辨率。实验结果表明,新的最优广义S变换与短时傅里叶变换和S变换相比能得到更高的时频聚集度,具有更高的时频分辨率,在实际应用中具有更高的实用性和灵活性,为目标信号检测提供了科学依据。
[Abstract]:In GPR signal processing, image resolution plays an important role in GPR data analysis. Because the electromagnetic wave emitted by ground penetrating radar is disturbed by various noises in the process of underground propagation, the detection effect of ground penetrating radar on some weak signals is not obvious, and the traditional time-frequency analysis method is difficult to detect these weak signals. In order to solve the above problems, a new optimal generalized S-transform is proposed. The new optimal generalized S-transform introduces two parameters to adjust the shape and size of the window, and optimizes the parameters through the energy concentration criterion to improve the resolution of time-frequency distribution. The experimental results show that compared with STFT and S-transform, the new optimal generalized S-transform can obtain higher time-frequency aggregation, higher time-frequency resolution, higher practicability and flexibility in practical application. It provides scientific basis for target signal detection.
【作者单位】：中国地质大学(武汉)自动化学院;
【基金】：国家自然科学基金(61503351,61401409) 湖北省自然科学基金(2015CFB520)
【分类号】：TN957.51

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