3D Imaging Algorithm of Directional Borehole Radar Based on Root-MUSIC

Remote Sensing

Sixin Liu¹  Wentian Wang²  Wenjun Zheng²  Xuzhang Shen² 

[1] College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China;School of Earth Science and Engineering, Sun Yat-Sen University, Zhuhai 519082, China;

关键词: orientation recognition;    Root-MUSIC algorithm;    directional borehole radar;    3D imaging;   

DOI  :  10.3390/rs13152957

来源: DOAJ

【 摘 要 】

A directional borehole radar consists of one transmitting antenna in the borehole and four receiving antennas distributed at equal angles in a ring. The receiving antennas can determine the depth and orientation of targets beside the borehole. However, the problem of target orientation determination and 3D imaging algorithms remains a technological challenge. The MUSIC (multiple signal classification) algorithm requires a peak search, so the accuracy of the operation is limited by the angle interval. Based on the MUSIC algorithm, the Root-MUSIC algorithm is proposed and implemented. By replacing the spectral peak search with calculating the roots of the polynomials greatly improves the orientation recognition accuracy. Finally, the results obtained using the above algorithm are verified with synthetic data and compared with the results of the MUSIC algorithm. The results show that both the MUSIC algorithm and the Root-MUSIC algorithm can achieve very good orientation determination and 3D imaging results. In terms of accuracy, the Root-MUSIC algorithm has an obvious improvement compared with the MUSIC algorithm.

【 授权许可】

Unknown