Moving Targets Localization for Dual Frequency Continuous Wave Radar Using Time Domain Analysis

Technology that can be used to precisely detect and monitor the presence of moving subjects from a distance and through barriers can be a powerful tool supporting a large range of applications. To this end, dual frequency continuous wave (CW) radar, which estimates the localization of targets based on the phase difference between two closely spaced frequencies, has been shown a cost-effective approach. In this paper, we propose a simple method to determine the localization of multiple moving targets using a dual frequency continuous wave radar. Different from the traditional imaging algorithm, the proposed new technology concentrates its computation mostly in time domain, which not only successfully avoids the leakage effect caused by the discrete Fourier transform (DFT), improving the accuracy of the detection results, but also addresses the targets separation problem even in frequency ambiguous zones. Besides, it also helps dealing with result matching problem which is of significant importance in certain practical applications. Simulation results are presented to validate the technique.