Three-dimensional micro-doppler signature extraction in MIMO radar

In traditional monostatic radar, only the micromotion signatures projected in line-of-sight (LOS) could be extracted from the target´s echoes, which are insufficient for accurate target recognition due to the target-aspect sensitivity. In this paper, we propose an algorithm for the three-dimensional micro-Doppler signature extraction using the multi-input multi-output (MIMO) radar technique. The micro-Doppler effect in MIMO radar induced by rotation is analyzed. Profited from the multi-view of MIMO radar, the three-dimensional micro-motion features, which are not sensitive to the target´s aspect anymore, are obtained by solving nonlinear multivariable equation systems. Simulations are given to validate the effectiveness of the proposed algorithm.