Velocity Deambiguation Method for DDMA-MIMO Radar Based on Phase Compensation

In order to address the issues of velocity ambiguity and target energy dispersion in DDMA-MIMO radar, an enhanced velocity defuzzification methodology is presented. Firstly, the repeated distribution of the target's spectrum is exploited to compress the range Doppler spectrum in the Doppler dimension. This results in the conversion n of the two-dimensional detection to the detection of a single distance-dimensional vector. Furthermore, the subarea peak search is employed to replace the Doppler-dimensional CFAR detection within the Doppler dimension, thereby significantly enhancing the detection efficiency. In addition, a DDMA waveform free of empty bands is designed to estimate the target angle while achieving velocity deblurring through phase compensation and digital beam forming algorithms. The efficacy and superiority of the proposed method are demonstrated through a verification process using measured data.