Patent ID: 7577115
Filing Date: 2009-08-18
Classification: H04B

Abstract:
1. An apparatus for acquiring a code group in an asynchronous W-CDMA system, comprising: a primary synchronization channel search unit to achieve slot timing synchronization of a received primary synchronization channel; a secondary synchronization channel search unit to start a correlation operation between a predetermined number of slots of a received secondary synchronization channel and a predetermined number of code group candidates according to the synchronization channel slot timing synchronization, and if there is a first code group candidate having a secondary synchronization code characteristic exceeding a predetermined threshold, to send information about the first code group candidate to a selector; the selector to send the information about the first code group candidate to a storage unit, to receive a second code group candidate having the same secondary synchronization code characteristic as the first code group candidate from the storage unit, and to directly transmit the first code group candidate and the second code group candidate to a code group acquiring unit without passing the second code group candidate to the secondary synchronization channel search unit; the storage unit to store code group candidates according to the secondary synchronization code characteristic, and to send the second code group candidate to the selector and to the secondary synchronization channel search unit; and the code group acquiring unit to acquire the code group having a maximum correlation characteristic from among the first and second code group candidates received from the selector, wherein the second code group candidate is sent from the storage unit to the secondary synchronization channel search unit so that a correlation operation by the secondary synchronization channel search unit is not carried out for the second code group candidate.