New image restoration algorithm for ultra-wide band radar system

A new multi-channel blind image restoration algorithm based on sub-space and Constrained Least Square (CLS) is proposed to solve the imaging problems of ultra-wide band (UWB) through-wall radar echo under low signal to noise ratio (SNR). The high resolution of the radar image is transformed into multi-channel blind image restoration based on the modeling for the through-wall radar echo. And the concept of sub-space is considered as the limitation of blur identification, a new cost function is constructed to restore the multi-channel blind images. Experimental results prove that the new method is effective in improving the resolution of radar image.