Correlation detecting method and matched filter unit

摘要

A matched filter unit and correlation detecting method for finding a correlation value between each of a plurality of multiplexed digital input signals and digital codes strings by using a signal output from a delay circuit which is disposed in M stages. Each of a plurality of computing devices includes M multipliers for multiplying the signal output from each of the delay circuits by each digital code of the digital code string and an adder for adding results of multiplication from the M multipliers to find a value of correlation. The same storage circuit is used to detect correlation between multiplexed digital signals entered from the plurality of channels; this enables the matched filter unit to be significantly reduced in size, with lower manufacturing costs and reduced power requirements.