An adaptive transversal filter VLSI

This paper describes a hardware architecture of an adaptive transversal filter with long delay taps and its LSI implementation. We developed an adaptive transversal filter VLSI with 512 taps which is suitable for an echo canceller system. We developed a new compuatational method suitable for VLSI implementation, and clarified the required computation accuracy and dynamic range by computer simulation. We built proto-type four channel echo canceller system using four VLSI chips and a sigle chip of general purpose digital signal processor.