Multi-target Detection of FMCW Radar Based on Width Filtering

Considering the issue of how to implement multi-target detection rightly in the complex environment of LFMCW (linear frequency modulated continuous wave) radar, a framework was proposed to analyze target detection based on width information in the frequency domain. The method involves three procedures. First, CFAR (constant false alarm rate) processor was implemented in frequency spectrum of beat frequency for the echo. Besides, a clustering algorithm was introduced to obtain width and amplitude information by calculate the continuous interval width of the frequency spectrum in positive frequency domain after the CFAR, Finally, multi-target detection by remove tiny spectrum cluster through width filtrating and spectrum line association utilize amplitude and width information in frequency domain. And a computer simulation was carried out. The result showed that the framework could effectively eliminate false target caused by clutter. The method could be used in target location and tracking signal processing in continuous wave radar system.