PROGRAMMABLE HYBRID PROCESSOR FOR RECURSIVE AND ITERATIVE DIGITAL SIGNAL-PROCESSING

An hybrid acousto-optic processor, limited to iterative signal processing (transversal filtering), has been first studied in our laboratory. An extension to recursive filtering is now reported. As a benefit from the needed modifications, the computation cycles of the system are now fully programmable (like for bit-slice processors) and optimized in order to preserve the high speed rate capability of the acousto-optic interaction. The various stages in the design, the realization using erasable programmable logic devices, together with applications to infinite impulse response filtering are presented. The performances of the new system discussed.