THz-SAR Vibrating Target Imaging via the Bayesian Method

Bin Deng, Xin-yun Wang, Cheng-guang Wu, Yu-liang Qin, Hong-qiang Wang
2017 International Journal of Antennas and Propagation  
Target vibration bears important information for target recognition, and terahertz, due to significant micro-Doppler effects, has strong advantages for remotely sensing vibrations. In this paper, the imaging characteristics of vibrating targets with THz-SAR are at first analyzed. An improved algorithm based on an excellent Bayesian approach, that is, the expansion-compression variance-component (ExCoV) method, has been proposed for reconstructing scattering coefficients of vibrating targets,
more » ... ch provides more robust and efficient initialization and overcomes the deficiencies of sidelobes as well as artifacts arising from the traditional correlation method. A real vibration measurement experiment of idle cars was performed to validate the range model. Simulated SAR data of vibrating targets and a tank model in a real background in 220 GHz show good performance at low SNR. Rapidly evolving high-power terahertz devices will offer viable THz-SAR application at a distance of several kilometers.
doi:10.1155/2017/3706925 fatcat:d6fpy3ym55ggnpzjyqs6e7y5je