Patent ID: 6944149

Claim:
A PN sequence phase searching apparatus in a multi-carrier CDMA mobile communication system using the same PN code phase values, comprising: at least two PN sequence phase searchers for searching for the PN sequence phase of one of at least two different band input signals using different assigned search conditions and for outputting PN phase and energy information; and a controller for assigning said different search conditions to said at least two PN sequence phase searchers and for determining a minimum phase variation period based on the PN phase and energy information received from said at least two PN sequence phase searchers, wherein said different search conditions include phases and search periods corresponding to a plurality of PN sequence phase search starting points determined by dividing the entire phase area into a number of sections, and wherein said at least two PN sequence phase searchers perform a PN sequence phase search within a minimum phase variation period determined by said controller, and wherein one of said at least two different band input signals is switched to said at least two PN sequence phase searchers at the time point when said different search conditions are assigned and the band input signals are switched to the corresponding PN sequence phase searchers at the time point when the minimum phase variation range is determined, under the control of the controller.