Patent ID: 7876731

Claim:
A method of acquiring a code group in an asynchronous wideband code division multiple access (WCDMA) system, comprising: a first step in which a primary synchronization channel search unit achieves primary synchronization channel slot timing synchronization; a second step in which, if the primary synchronization channel slot timing synchronization is achieved, a 1-1 search unit receives a secondary synchronization channel from a first antenna, starts correlation operations between some of slots of the received secondary synchronization channel and code group candidates, and transmits information about code group candidates having correlation operation values exceeding a first threshold value to a second search unit; a third step in which, if the primary synchronization channel slot timing synchronization is achieved, a 1-2 search unit receives the secondary synchronization channel from a second antenna, starts correlation operations between some of slots of the received secondary synchronization channel and code group candidates, and transmits information about code group candidates having correlation operation values exceeding a second threshold value to the second search unit; and a fourth step in which the second search unit calculates correlation characteristics based on the information about the code group candidates received from the 1-1 search unit and the 1-2 search unit, and selects a code group candidate having a highest correlation characteristic, wherein the second and third steps are performed to start correlation operations between some of the slots and the code group candidates while applying a receiver diversity function to the slots.