학술논문
A Pole-Extraction Algorithm for Wall Characterization in Through-the-Wall Imaging Systems
Document Type
Periodical
Source
IEEE Transactions on Antennas and Propagation IEEE Trans. Antennas Propagat. Antennas and Propagation, IEEE Transactions on. 67(11):7106-7113 Nov, 2019
Subject
Language
ISSN
0018-926X
1558-2221
1558-2221
Abstract
Estimation of wall parameters is critical for focused through-the-wall imaging (TWI). In this paper, a novel algorithm based on pole extraction and wall reflection coefficients is presented to accurately estimate the essential parameters of a multi-layered wall. The generalized pencil of function (GPOF) is applied to decompose the frequency-domain received signal into a summation of ordered exponential terms and phase delays. Matching the terms with the multiple wall reflections provides equations for extracting the parameters. A frequency-domain calibration process is proposed to remove the antenna response from the measured wall response. The formulation of the proposed parameter extraction and calibration algorithms is presented along with the simulated and measured results for validation. The efficacy of the method is demonstrated on a real TWI system.