{'fraction_non_alphanumeric': 0.02525832376578645, 'fraction_numerical': 0.0, 'mean_word_length': 5.656488549618321, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Diffraction tomographic imaging algorithm for through-the-wall radar in planar multilayer environment

In order to solve the problem of imaging of concealed targets in planar multilayer environment, a novel diffraction tomographic (DT) imaging algorithm for through-the-wall radar (TWR) system is proposed in this paper. By exploiting the Born approximation (BA) theory, the spectral form of the Green function of the planar multilayered medium and exploding reflection model, the proposed DT imaging method can utilize the fast Fourier transform (FFT) technique to achieve the fast and accurate imaging reconstruction of targets hidden behind the multilayered wall. The imaging results reconstructed via the processing of synthetic data generated by finite-difference time-domain (FDTD) method have verified the validity and effectiveness of the proposed imaging method.