Robust broadband matched-field processing: performance in shallow water by simulation
An issue of concern for matched-field processing is the strong dependence between performance andprecise knowledge about the environmental parameters. Recently a robust matched-field processorbased on minimax robust filtering methods was developed. In this report simulation methods areemployed to evaluate the performance of the minimax robust method as well as other robust methodsfor a range-independent shallow-water environment. The performance of the robust methods iscompared with that of the nominal processor, that is, the processor based on a single set of environmental parameters thought to be closest to the actual. The matched-field processing performance is evaluated in terms of the peak-to-sidelobe ratio, the simulation results indicate that the robust methods provide significant performance improvements over the nominal processor in the presence of uncertainty in water-column sound-speed, channel depth and sound speed in the bottom.
Gingras, Donald F.