Parameter estimation and imaging of rough surface rotating targets in the terahertz band

Qi Yang; Bin Deng; Ye Zhang; Yuliang Qin; Hongqiang Wang

doi:10.1117/1.JRS.11.045001

Abstract

Research on the scattering behavior of terahertz (THz) waves plays a prominent part in the development of remote sensing and imaging systems. Due to the relatively short wavelengths of THz waves, materials that could be considered smooth at microwave band may begin to display rough surface in the THz region. To study the scattering characteristics and implement parameter estimation and imaging of rough surface rotating targets in the THz band, THz radar systems with carrier frequencies of 220 and 440 GHz were built, and experiments based on a series of rough surface cylinders were carried out. From the time–frequency distributions and imaging results, the transition of scattering characteristics from smooth surface to rough surface is clearly visible, which is consistent with the fact that as the roughness increases, there is an overall increase in diffuse scattering. In addition, methods of rotation period estimation and target size estimation were proposed and applied to experimental data of the THz radar systems, and their validities were verified by the high-precision estimation results.

Citation Download Citation

Qi Yang, Qi Yang, Bin Deng, Bin Deng, Ye Zhang, Ye Zhang, Yuliang Qin, Yuliang Qin, Hongqiang Wang, Hongqiang Wang, } "Parameter estimation and imaging of rough surface rotating targets in the terahertz band," Journal of Applied Remote Sensing 11(4), 045001 (2 October 2017). https://doi.org/10.1117/1.JRS.11.045001 . Submission: Received: 22 June 2017; Accepted: 14 September 2017

Received: 22 June 2017; Accepted: 14 September 2017; Published: 2 October 2017

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