Abstract
ABSTRACT Based on the high correlation of respiration signals from the same human target in two channels and the geometric relationship between radar and target, a truncated cross-correlation method with the one-transmitter two-receiver stepped-frequency continuous-wave (SFCW) through-wall radar is proposed to realize detection and localization of multiple stationary human targets behind the wall. First, the truncated cross-correlation operation is performed on the preprocessed range profile planes of two channels to obtain a cross-correlation coefficient matrix. Then, two-dimensional cell averaging constant false alarm rate (2D CA-CFAR) detection is implemented to extract the round-trip propagation ranges between each target and transceiver from the correlation coefficient matrix. Ultimately, the ellipse cross localization is executed to calculate the target locations. The cross-correlation method can effectively detect human targets with different echo intensities and locate them by using range information from two channels simultaneously, which avoids the missed detection of weak targets and the occurrence of pairing problem. In addition, truncated operation reduces the amount of computation and the interference of ghosts. Experimental results verify the practicability and effectiveness of this method.
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