CAJ | 학술논문

通过估计墙体厚度及介电常数等环境参数来进行补偿成像是近年来穿墙雷达成像研究领域的热点。为解决传统穿墙成像模型中天线需要严格平行于墙体的限制，以及现有的环境参数估计算法计算效率低，稳健性较差的问题，该文建立了一种新的多发多收(MIMO)体制穿墙雷达成像模型以适应阵列与墙体位置关系未知的情况，同时根据该模型下墙体前后沿回波路径模型，提出一种仅依赖于墙体回波时延的环境参数估计算法，稳健性高并且运算复杂度低。时域有限差分(FDTD)仿真数据验证了成像模型和环境参数估计算法的有效性。
통과고계장체후도급개전상수등배경삼수래진행보상성상시근년래천장뢰체성상연구영역적열점。위해결전통천장성상모형중천선수요엄격평행우장체적한제，이급현유적배경삼수고계산법계산효솔저，은건성교차적문제，해문건립료일충신적다발다수(MIMO)체제천장뢰체성상모형이괄응진렬여장체위치관계미지적정황，동시근거해모형하장체전후연회파로경모형，제출일충부의뢰우장체회파시연적배경삼수고계산법，은건성고병차운산복잡도저。시역유한차분(FDTD)방진수거험증료성상모형화배경삼수고계산법적유효성。
Through-the-wall radar imaging by estimating the wall thickness and the dielectric constant is a hot research field in recent years. In order to lift strict restriction that the antenna should parallel to the wall in the traditional through-wall imaging model, and to solve the existing environmental parameters estimation algorithm with low computational efficiency and poor robustness problem, a novel linear MIMO array through-wall imaging model is proposed to adapt to the situation with unknown positional relationship between the array and the wall. Furthermore, based on the analysis of the echo path of the front and rear walls, this paper also presents a novel environmental parameters estimation algorithm with high estimation robustness and low computational complexity. Comparing to the conventional environmental parameters estimation algorithm, this proposed algorithm needs neither extra operations nor special targets to assist. The results calculated from Finite Difference Time Domain (FDTD) simulation verify the effectiveness of the proposed imaging model and environmental parameters estimation algorithm.