In the maruchipasu search manner of CDMA maruchipasu

摘要

PROBLEM TO BE SOLVED: To obtain the method for multi-path search able to be RAKE synthesis (in-phase synthesis) with respect to plural paths in following to a fluctuation of a delay profile of a code division multiple access system (CDMA) signal. ;SOLUTION: A search finger is used to detect reception signal levels at all tip phases (S1). Through the detection of a mean reception signal level in the initial search, a path subjected to be RAKE synthesis is selected by a RAKE synthesis path selection means (S2). In regard to the selected path, a tracking finger is sued to detect correlation of the selected path. After integration and damping, demodulation is conducted for each path and RAKE synthesis is executed. Each trackihg finger has a tracking function independently of each path. When paths are in duplicate, the selected path is allocated again based on ranking information of the reception signal level as to a tracking finger (S4). Based on phase update information of spread code replica of each tracking finger, a phase of the spread code replica of each path subject to RAKE synthesis is managed in real time.;COPYRIGHT: (C)1997,JPO