Radar imaging must obtain an extent of target spatial spectral-domain sampling

and the filling of spatial spectral domain is in direct connection with the quality of imaging result.Firstly

this paper proves the effect of spatial convolution that exists in MIMO(Multiple-Input Multiple-Output)radar signal model.Based on the electromagnetic inverse scattering theory

an imaging method is derived and the relation between imaging performance and spatial spectral-domain filling is presented.The influence of transmitting and receiving array on the spatial spectral-domain filling is discussed.Some principles of array distribution are achieved.Finally

simulations are performed in order to validate the effectiveness of the imaging method.The simulation results show the effectiveness of the imaging method and the theoretical results.