公开(公告)号：US09826569B2

公开(公告)日：2017-11-21

申请号：US14711132

申请日：2015-05-13

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ho-Il Kim ,  Da-Hae Chong ,  Soo-Bok Yeo

IPC: H04W24/08 ,  H04L12/26 ,  H04W76/04 ,  H04L1/16 ,  H04L1/18

CPC classification number: H04W76/048 ,  H04L1/1607 ,  H04L1/1671 ,  H04L1/1825 ,  H04L1/1838 ,  H04L43/0852 ,  H04W24/08 ,  H04W76/28

Abstract: A method of detecting indicator information received by a receiver of a wireless communication system is provided, and the method includes determining a threshold value that reduces costs incurred by a false alarm rate that decides discontinuous transmission (DTX) information transmitted from a transmitter as non-DTX information and a missed detection rate that decides non-DTX information transmitted from the transmitter as DTX information; and detecting the indicator information using the threshold value. The threshold value is determined based on a reception quality level for acknowledgement (ACK) information when the transmitter transmits the ACK information.

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.

公开(公告)号：US09655043B2

公开(公告)日：2017-05-16

申请号：US14667075

申请日：2015-03-24

Applicant: Samsung Electronics Co., Ltd.

Inventor： Ho-Il Kim ,  Shin-Woo Kang ,  Soo-Bok Yeo ,  Min-Goo Kim ,  Chae-Hag Yi

IPC: H04W52/02 ,  H04L1/18 ,  H04L1/00

CPC classification number: H04W52/0216 ,  H04L1/0053 ,  H04L1/1854 ,  H04W52/0229 ,  H04W52/028 ,  Y02D70/1262

Abstract: Methods and apparatuses are provided for reducing power consumption by early decoding. It is determined whether a predetermined decoding condition is satisfied upon expiration of a time unit in a transmission time interval. Decoding is performed on a signal that has been received through the time unit in the transmission time interval, when the predetermined decoding condition is satisfied. A controller outputs an instruction signal to a RF processor to set to a low-power mode during a remaining time period of the transmission time interval after the time unit in the transmission time interval, when the decoding is successful. Decoding is performed on the signal that has been received through the RF processor upon expiration of a last time unit of the transmission time interval regardless of the predetermined decoding condition, when the time unit is the last time unit in the transmission time interval.