Motion parameter estimation of multiple targets in multistatic radar through sparse signal recovery

The problem of estimating motion parameters of multiple closely located ground moving targets in a multistatic passive radar system is considered, with a focus on weak signal conditions. The proposed method provides a means of com-bining signal energy from all available, spatially separated, illuminators of opportunity to achieve multistatic diversity and overall signal enhancement. The proposed technique is based on sparse signal recovery and exploits a two-step pro-cess that sequentially estimates the acceleration and velocity vectors in order to reduce the dimensionality of parameter search space. I