Novel high range resolution approach in microwave imaging

The authors propose a method of gaining range superresolution in a microwave imaging system. After frequency domain deconvolution of the echo to the transmitted signal, the signal model is proved to be of the same form as that of DOA estimation. Hence, as in the case of DOA estimation, a nonlinear spectrum estimation algorithm can be applied to improve range resolution. Numerical simulation and experiments have shown the method to be cost-effective.