Weighted Projection Optimization for Range-dependent Clutter Suppression in Bistatic MIMO Radar

In bistatic MIMO radar system, all the clutter ridges are located in the same plane of the three- dimensional space. By using this characteristic, a weighted projection optimization based range-dependent clutter suppression method is presented. The coordinates of the clutter spectra are first rotated through a special angle. Then the projection weights are optimized by maximizing the output Signal-Interference-Noise Ratio (SINR) to transform the 3-Dimensional (3D) range-dependent clutter to 2D range-independent. Furthermore, the resultant nonlinear optimization issue is reformulated as a Semi-Definite Programming (SDP) one, which can be solved very efficiently. Analysis of simulation indicate that the proposed method is easy to implement and can cancel the range-dependent clutter effectively.