The use of maximum likelihood estimation for forming images ofdiffuse radar targets from delay-Doppler data
Snyder, D.L.; Oapos;Sullivan, J.A.; Miller, M.I.
Information Theory, IEEE Transactions on
Volume 35, Issue 3, May 1989 Page(s):536 - 548
Digital Object Identifier   10.1109/18.30975
Summary:An approach to high-resolution imaging that starts with a model of the radar echo signal derived from the physics governing radar reflections is presented. The model has been used in the past to describe radar targets that are rough compared to the wavelength of the transmitted radiation. Without specifying precisely what the transmitted signal is, a general estimation-based procedure is derived for obtaining images. After discretizing the model, the radar imaging problem reduces to the task of estimating discretized second-order statistics of the reflectance process of the target. Maximum-likelihood estimates of these statics are obtained as the limit point of an expectation-maximization algorithm

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