Cell search system for mobile station in time division...

Details Cell search system for mobile station in time division... Cell search system for mobile station in time division...

2008-01-22

2008-01-22

To, Doris H. (Department: 2616)

Multiplex communications

Communication over free space

Combining or distributing information via time channels

C370S509000, C455S525000

Reexamination Certificate

active

07321584

ABSTRACT:
A 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 and comparing frame values of the primary synchronization codes to determine a position of the maximum value; a correlation module for estimating a phase value and acquiring a first correlation value; 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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Universal Mobile Telecommunications System (UMTS), Physical Layer Procedures (TDD), 3GPP TS 25.224 version 4.1.0 Release Jul. 4, 2001.
2000, IEEE, Design of Cyclically Permutable Codes for PN Code Acquiaition in WCDMA TDD Mode, pp. 581-587.
2000 IEEE, Experimental Evaluation of 3-Step Cell Search Method in W-CDMA Mobile Radio, pp. 303-307.

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