Patent ID: 6813309
Filing Date: 2004-11-02
Classification: H04B

Abstract:
A Code Division Multiple Access (CDMA) reception circuit that is a reception circuit in a mobile terminal that uses a spread spectrum to realize communication, performs a search of arrived radiowaves that detects radiowaves of propagation paths having different delay times, and uses RAKE combining to combine received signals from radiowaves of different propagation paths; characterized in thatan amount of fluctuation of received electric field of the received signals is detected, it is distinguished, based on said amount of fluctuation, whether said mobile terminal is in a state of relatively high-speed movement or in a state of relatively low-speed movement, and during said state of relatively low-speed movement, said search of arrived radiowaves is performed intermittently by performing said search of arrived radiowaves only in vicinities of previously found arrival times for each of said propagation paths.