Spectral Redundancy Compensation in Multi-Static Millimeter-Wave Imaging

This brief introduces a modified backprojection algorithm to compensate the effect of redundancy of captured data in spatial-fourier or <inline-formula> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula>-space domain for multi-static millimeter-wave imaging. The data measured by each transmitter-receiver pair is explained in <inline-formula> <tex-math notation="LaTeX">${k}$ </tex-math></inline-formula>-space domain and the redundancies are determined. Such redundancies act as an undesirable filter that distorts the appearance of the resulting image. Our goal is to modify SAR backprojection algorithm to address this problem, where extensive simulation and experimental results are also provided. Our measurements show a significant improvement in the overall quality and edge preservation in the reconstructed image of objects under the test through the proposed reconstruction algorithm.