Statistical MIMO radar based on coherent signals

Multi-Input and Multi-Output (MIMO) radar was a new radar technology in the recent years, which used spatial diversity gain of the signal instead of coherent gain in traditional phased-array radar. Using the ideal point source model, this paper made an analysis of these two kind gain´s contribution to radar detection system, which was divided into two classes: the contribution to system robustness and the contribution to improve the signal-to-noise ratio. Based on this, proposed that the MIMO radar´s space diversity gain could make more contribution to signal-to-noise ratio, which rationality was showed by the modification of the statistical MIMO model. The above theory was verified by simulation.