公开(公告)号：US09882745B2

公开(公告)日：2018-01-30

申请号：US14750413

申请日：2015-06-25

Applicant: Samsung Electronics Co., Ltd.

Inventor： Dah-Hae Chong ,  Ho-Il Kim ,  Soo-Bok Yeo ,  Min-Goo Kim ,  Chae-Hag Yi

IPC: H04L25/02 ,  H04J11/00 ,  H04L27/00

CPC classification number: H04L25/024 ,  H04J11/0069 ,  H04L27/0014 ,  H04L2027/0026

Abstract: Methods and apparatuses are provided for performing a cell search by a receiver in a communication system. A scrambling code is identified by correlating a common pilot channel with a first synchronization accumulation length based on a frame boundary and a code group. A multipath signal is sought by correlating the common pilot channel with a second synchronization accumulation length based on the frame boundary and the code group. A difference between, or a ratio of, a first maximum value of first correlation values acquired during identification of the scrambling code and a second maximum value of second correlation values acquired during searching for the multipath signal, is determined. It is determined whether a frequency offset exists by comparing the difference or the ratio with a predetermined threshold value. The frequency offset is estimated and the frequency offset is transmitted to a demodulator, when the frequency offset exists.