Frame timing detection circuit, frame timing detection method, cell search apparatus, and a portable radio terminal using a cell search system

摘要

A frame timing detecting circuit, detecting method, cell search apparatus and a portable wireless terminal using such a cell search apparatus are provided. A frame timing detecting unit (100) of a cell search unit (70) of a portable wireless terminal calculates correlation values with all synchronization codes for each slot, deviations thereof are accumulated, and frame correlation values corresponding to scrambling code group numbers are calculated. Maximum values are detected with the slots being shifted, and slot offset number (frame timing) and the corresponding scrambling code group number are detected. Accordingly, the frame timing can be detected with high accuracy regardless of variation in the wireless propagation environment. IMAGE