High-resolution walled-LTSA-array ground penetrating radar system using adaptive complex-valued self-organizing-map processing

We present a newly developed high-resolution adaptive imaging system using switched walled linearly tapered slot antenna (walled-LTSA) array and complex-valued self- organization-map (CSOM) processing. In the CSOM processing, we deal with feature vectors that possess complex-amplitude texture in space and frequency domains. A higher resolution results in a better classification quality. To realize a high resolution in range and azimuth directions, we employ a wide frequency bandwidth in frequency stepping operation, and a special switching scheme for the walled LTSA. We have realized successful plastic landmine visualization not only for targets buried in normal sand but also for those in wet laterite soil.