基于折射角近似的穿墙成像墙体补偿方法

Wall Compensation Method Based on Refraction Angle Approximation in Through-the-wall Radar Imaging

穿墙成像雷达探测中墙体穿透将导致目标图像散焦和位置偏移,墙体补偿是解决这一问题的关键。最短路径法是实现精确墙体补偿的典型算法,但存在运算量大的问题。为解决上述问题,提出了上述基于折射角近似的穿墙成像墙体补偿方法,其原理是利用折射角近似法得到大幅度缩短的最短路径法搜索区间,从而显著减小运算量。一方面,不同墙体参数的数值分析结果定量说明了减小运算量的程度;另一方面,MATLAB仿真结果证明了算法在有效减少计算量的同时实现了精确墙体补偿。

In through-the-wall radar imaging, target images are defocused and displaced from their true positions because of wall penetration of electromagnetic wave, and wall compensation is the key to solve this problem. The shortest path method is a typical algorithm for precise wall compensation, but it has a huge computational burden. To solve the problem, a wall compensation meth? od based on refraction angle approximation in through-the-wall radar imaging is proposed. The searching region of the shortest path method is significantly shortened, and the calculation is greatly reduced by the proposed method. On the one hand, the amount of calculation is numerically analyzed under different wall parameters. On the other hand, MATLAB simulation demonstrates that the calculation is effectively reduced, and the precise wall compensation is accomplished.