Signal processing techniques for improving angular resolution performance in homodyne FMCW radar

Homodyne Frequency Modulated Continuous Wave (FMCW) radar results LO (Local Oscillator) signal leakage from structural properties of a transceiver. The phenomenon of LO signal leakage degrades high resolution performance. Therefore many researchers have been trying to overcome and improve the technical shortcoming of homodyne transceiver. This paper proposes new signal processing techniques and implementations to improve high angular resolution estimation for homodyne FMCW radar. It examines several multiple signal classification (MUSIC) algorithms such as conventional, Forward/Backward spatial smoothing, and beamspace algorithms and presents typical high resolution signal processing method before describing the proposed signal processing techniques and the results of simulation and real experiment. The high resolution performance of the proposed method is compared to that of general high resolution signal processing based on conventional MUSIC, Forward/Backward spatial smoothing (FBSS) MUSIC, and beamspace (BS) MUSIC algorithms in terms of directions of arrival (DOA).