Holographic Inversion for Millimeter Wave Imaging Based on Range Stacking and Coherence Factor

In this paper, the recently indigenously developed general holographic imaging (HI) algorithm based on linear frequency modulation (LFM), namely GHI-LFM, for millimeter wave imaging (MMWI), is further improved by using range stacking (RS) and coherence factor (CF), called HI-RS-CF. While avoiding the traditional time-consuming interpolation operation by using RS, the imaging accuracy is further improved by using CF. Consequently, both the imaging efficiency and accuracy are apparently improved. It is validated by imaging using both synthetic data of benchmark objects and real data.