“…Radar is an electronic system with the advantages of low cost, low-power consumption, and high precision [1], which can be significantly applied in space shuttle topographic missions [2,3], optics [4], geotechnical mapping [5], meteorological detection [6], and railway ballast evaluation [7]. With the continuous progress of technology [8,9] and the demand of utilization [10,11], radar has gradually changed from obtaining the distance [12], azimuth [13], and altitude information [14,15] from the target to the launching point of electromagnetic wave to gaining more expanded information [16,17], such as hand-gesture recognition [18], displacement field of the Landers earthquake mapped, and detecting pedestrians with multiple-input multiple-output (MIMO) [19,20].…”