Delay-doppler pocs for specular multipath

A method is presented for resolving delay and Doppler specular multipath components using an extension of a previously developed projection onto convex sets (POCS) algorithm. To improve performance and convergence speed, a matched-filter based support constraint is incorporated into the variance of the residual constraint in the style of constrained least squares. The resulting algorithm performs well in a wide variety of delay and Doppler simulated multipath environments. Simulation results for the POCS algorithm are included along with results for matched filtering and least squares for comparative purposes.