Matched filter and receiver for mobile radio communication system

Abstract

A matched filter requiring no high-speed processor and which consumes less power is disclosed. Partial filtersN obtained by dividing number of matched filter taps by N are provided with a controllerfor controlling which partial filters are enabled. The controlleris supplied with maximum amount of delay of an input signal and with symbol timing. On the basis of the maximum amount of delay, the controllerenables only the minimum number of partial filtersthat are capable of executing an amount of computation that is required in one symbol period. The enabled partial filters are used multiple number of times per symbol period and the output, each time, integrated sample by sample. Since the disabled partial filters will not operate, it is possible to reduce power consumption and computation time.