基于Radon变换的浅海宽带脉冲声源定位

为了提高声纳在浅海的工作性能，在分析实验数据的基础上提出了新的多路径定位方法.将已知信
号与每个通道的接收信号进行相关，获得相关系数矩阵，对由相关系数矩阵构成的图像进行Radon变换，
以时间分辨力补偿空间分辨力，提取声场的多路径参数，估计声线到达角和到达时延差，结合声线反传技
术，实现宽带脉冲声源定位.在修正阵型估计误差后，进一步提高算法的定位精度.实验结果表明，该方法
能有效地对浅海脉冲声源进行定位，不受空间采样率或路径数必须小于阵元数的限制，具有较好的宽容性
.算法计算量小，易于工程实现.

Radon transform based wideband impulsive source localization in shallow water

For improving the sonar performance in shallow water, a novel multi-path localization method based on experimental data analysis was proposed. A correlation coefficient matrix was obtained by correlating the known signal with the received signal of each channel, and radon transform was performed on the image comprised of the correlation coefficient matrix. Spatial discrimination was compensated by temporal discrimination, and the multi-path parameters of the acoustic field were extracted by estimating the directions of arrival rays and the time difference among arrival rays. By using the back-propagating ray technique, the site of the wideband pulse source was finally localized. After array shape estimation error was corrected, the algorithm yielded higher precision of source localization. Experimental result shows that the algorithm is efficient for impulsive source localization in shallow water, is robust without constraints of spatial sampling-rate, and does not require that the number of multi-path rays is less than the number of array elements. The algorithm can be easily implemented at a low computation cost.