CELL SEARCH SYSTEM FOR MOBILE STATION IN TIME DIVISION DUPLEX SYSTEM AND METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a cell search system for a mobile station that can reduce a base station searching time by discriminating the presence of synchronization through a confirmation mode after searching a secondary synchronization code without setting a critical value by the system at searching of a base station by the mobile station.

SOLUTION: The cell search system for a mobile station in a time division duplex system includes; a primary synchronization code search module for searching primary synchronization codes while searching frames to determine a position of the maximum value; a correlation module for estimating a phase value required to demodulate a sub synchronization code and acquiring a received signal and a first correlation value for a code configuring a secondary synchronization code; a secondary synchronization code search module for generating determinative variables and storing them based on the position of the maximum value; a comparison and decision module for detecting a maximum value of the determinative variables, comparing it with the values stored in the secondary synchronization code search module to count matching values, and comparing the count value with a system value to decide whether slot synchronization and group acquisition is successful; and a base station determination module for determining a second correlation value between midamble codes and the received signals, and selecting a maximum value of it to determine a base station.

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