Time-reversal imaging based on the space-frequency MDM and cancellation operator

Abstract

This study presents a novel time-reversal approach to locate targets based on the spatial information from the space-frequency multistatic data matrix plus the maximum detection and signal subtraction. The cancellation operator enables us to cancel the echoes coming from preliminarily detected targets, and we can transfer the multitarget imaging program into a series of single-target ones. Therefore, the targets can be accurately focused in the new environment. The advantages of the new algorithm over the conventional multitarget imaging algorithm are demonstrated by several numerical simulations.

Keywords:

• time-reversal imaging
• space-frequency MDM
• cancellation operator
• space-frequency imaging

Acknowledgments

This study was supported by the NSAF of China (11076022), the 973 Program of China (2013CB328904), the Fundamental Research Funds for the Central Universities (SWJTU12ZT08) and the Program for New Century Excellent Talents in University (NCET-10-0702).