Path timing detection circuit and detection method thereof

摘要

A path timing detecting circuit can save consumed current by omitting correlative arithmetic operation (cumulation) in unnecessarily long correlation length L when a propagation environment is relatively good, and a plurality of paths can be detected with high precision. The path timing detector circuit performing a correlative arithmetic operation of a spread modulation wave and a predetermined spread code with a given period of delay and detecting a reception timing of the spread modulation signal via each path on the basis of a result of the correlative arithmetic operation, comprises monitoring means (17) for monitoring whether a cumulated value exceeds a threshold value (21) during a process of the correlative arithmetic operation and correlative arithmetic operation control means responsive to the cumulated value in excess of the threshold value for stopping the correlative arithmetic operation in a corresponding delay period.