Patent ID: 7508796

Claim:
A wireless base station which communicates by a Code Division Multiple Access (CDMA) method, the wireless base station comprising: path capture means for setting a temporary captured path near a preset propagation delay when a signal is received from a state in which no upward signal is input, and performing a normal path capture process for the input signal; channel estimation means for performing channel estimation, RAKE combination, and signal to interference ratio measurement per slot for a path captured by said path capture means; decoding means for decoding a RAKE combined pilot data sequence obtained by said channel estimation means, and calculating an average per wireless frame of the signal to interference ratios measured for individual slots; and correction calculation means for determining whether pilot bit reception is OK or NG on the basis of pilot bit information per wireless frame decoded by said decoding means, and determining whether signal to interference ratio determination is OK or NG with respect to signal to interference ratio average information measured by said decoding means; wherein said correction calculation means comprises a pilot bit determination unit which determines whether pilot bit reception is OK or NG, an SIR determination unit which determines whether signal to interference ratio determination is OK or NG, and a synchronization establishment determination unit which determines wireless frame synchronization by using results of the determination of pilot bit reception OK/NG and the determination of signal to interference ratio determination OK/NG.