Samsung Electronics Co., Ltd.

Chae-Hag Yi

Min-Goo Kim

Sung-soo Kim

Se-Bin Im

Soo-Bok Yeo

Hyun-seok Yu

Do-Yun Kim

Ho-Il Kim

Tae-Sung Kim

Young-Joon Choi

Su-Hwan Kim

Jun-Ho Huh

Eui-Bum Han

Hae-Chul Lee

Beom-Kon Kim

Sung-Hwan Hyun

Rasmus Abildgren

Jeong-Gyun Yu

Se-Jin Kong

Seok-Joong Heo

Hwan-Min Park

Kook-Hyung Lee

Jin-Won Choi

Jin-Hyun So

Won-Seok Park

Shin-Woo Kang

Joo-Yeol Yang

Seung-Kwan Paik

Pil-Ho Kim

Dah-Hae Chong

Disclosed is a terminal in a communication system including a transceiver, and at least one processor configured to generate modem control information, transmit, to a server, the modem control information through the transceiver, when the generated modem control information includes location information of the terminal, receive, from the server, the modem control information related to an estimated movement path of the terminal, the estimated movement path being determined based on the location information of the terminal, and perform a communication using the updated modem control information, wherein the updated modem control information includes at least one of cell identity information, signal strength per cell, frequency offset, timing offset, channel state information (CSI), interference information, and downlink configuration information.

Method and apparatus for controlling modem in wireless communication system

A method and apparatus for controlling a modem of a user equipment (UE) in a wireless communication system is provided. The method includes generating at least one modem control information determined based on information related to a wireless communication environment, when at least a portion of the wireless communication environment is changed, updating a priority stored in a database of the UE based on the changed wireless communication environment and controlling the modem of the UE using the priority-updated modem control information.

A communication device and method operating in a wireless communication system is provided. The communication device includes a memory configured to store frequency history information; and a processor electrically connected to the memory, wherein the processor is configured to measure reception power of each of a plurality of first signals included in a first band, determine a first candidate frequency set according to a strength of each measured reception power, determine a second candidate frequency set updated from the first candidate frequency set based on the frequency history information, and determine whether a cell corresponding to each frequency included in the second candidate frequency set exists.

Communication device for performing carrier search in TD-SCDMA system and method of controlling same

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.

Method and apparatus for perfoming cell search and frequency offset estimation

Methods and apparatuses are provided for controlling a communication device. A first subframe is received from a serving cell and a plurality of subframes is received from a plurality of neighbor cells. A respective time difference of arrival (TDOA) is measured for each of the plurality of subframes based on a time of arrival (TOA) of the first subframe. At least one of the measured TDOAs is transmitted to a location server. The respective TDOAs are measured based on at least one of a cell-specific reference signal (CRS) and a synchronization signal in the plurality of subframes.

Communication device and method for controlling the same

A communication device and method of controlling the same are provided. A communication device includes a transceiver that receives a radio signal and a processor electrically connected to the transceiver, and is configured to store a data signal including data received through the radio signal in a first buffer according to a first delay period, store a channel signal including channel estimation information on a transmission channel of the radio signal in a second buffer according to a second delay period, determines a coefficient of a low pass filter and a group delay related to the low pass filter based on information related to the radio signal, and output at least one of the channel signals stored in the second buffer based on the determined group delay and the first delay period to perform equalizing.

Communication device and method of controlling same

A communication device and a method of controlling the same. The communication device includes at least one receiver configured to connect to a first antenna for receiving a first signal and a second antenna for receiving a second signal; and a processor electrically coupled to the at least one receiver, wherein the processor is configured to measure received signal strengths of the first signal and the second signal based on calibration operation for the first antenna and the second antenna, select one of the first antenna and the second antenna based on the measured received signal strengths, and control the at least one receiver to receive a signal through the selected one of the first antenna and the second antenna.

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.

Method and apparatus for reducing power consumption by early decoding

The present disclosure relates to a method and an electronic device for processing data on the basis of a Bluetooth Low Energy (BLE) protocol. The electronic device includes a Bluetooth control module and a processor. The Bluetooth control module stores a modified BLE protocol stack including at least two Attribute Protocols (ATTs) for use with an application, the modified BLE protocol stack includes a first path and a second path. The first path includes a first ATT protocol to process an ATT command of the application, and the second path includes a second ATT protocol to process an ATT command of the application. The processor is coupled to the Bluetooth control module. The processor processes data of the application including the ATT command, using the modified BLE protocol stack including the at least two ATTs of the Bluetooth control module.

Method for processing data based on bluetooth protocol and electronic device thereof

A method of iterative detection and decoding by a receiver and a receiver for iterative detection and decoding. The method includes generating a channel estimated value using a received signal; storing the generated channel estimated value; generating a Log Likelihood Ratio (LLR) value using the received signal and the stored channel estimated value; and generating a decoded bit as feedback information using the LLR value, wherein the LLR value is iteratively regenerated using the generated feedback information, the stored channel estimated value, and the received signal.

Apparatus and method for reception using iterative detection and decoding

Methods and apparatuses are provided for driving a modem. A Channel Impulse Response (CIR) is computed through channel estimation. An estimation time position is estimated by applying a weighted-average method to the CIR. A time offset is measured by comparing the estimation time position with a reference time position. The time offset is compensated for.

Modem and driving method thereof

A device for restoring data from signals transmitted through plural antenna includes a plurality of despreading units to restore pilot and data signals by means of pilot and data Walsh codes, a path controller to selectively activate the despreading units, an antenna-waiting signal generator to generate an antenna-waiting signal with the pilot signals output from the despreading units, an adder to sum the data signals output from the despreading units, and a controller to control the path controller and the adder in accordance with a transmission scheme of a base station. The invention provides one receiver system for a mobile terminal to be adaptable to various environments of transmission diversity with base stations, such as orthogonal transmission diversity (OTD), time-switched transmission diversity (TSTD), selection diversity (STD), or transmission antenna array (TXAA).

Device for regenerating data from signals transmitted through plural antenna

Methods for effectively transmitting data in dual diversity systems by utilizing Reed-Solomon coding is provided. Two Reed-Solomon (RS) coding schemes are considered for dual diversity systems: RS(n,k) codes with symbol diversity order of 2 and RS (n,k/2) codes with symbol diversity order of 1. We show that the second scheme utilizes the inherent error detecting capability of low rate RS codes. The RS (n, k/2) codes with symbol diversity order 1 significantly reduce the probability of undetected word error among accepted codeword and give comparable throughput to that of RS (n,k) codes with symbol diversity order 2.

Data transmission method for dual diversity systems

A receiver is provided for use in a spread spectrum communication system for receiving a spread spectrum signal having a modulated PN code, the receiver including: an analog-to-digital converter for sampling an input signal in synchronization with a first clock signal, and generating a sampled signal. The first clock signal having n times a frequency of a chip clock signal. Also included is a counter for a counting a number of clocks of the first clock signal to generate a selection signal; a pseudonoise code generator for generating a substantially replica pseudonoise code signal in synchronization with a second clock signal having the frequency of the chip clock signal; a memory for storing the sampled signal in synchronization with the second clock signal; a selector for selecting one of the sampled signals stored in the memory in response to the selection signal; a demodulator for demodulating the pseudonoise code signal from the sampled signal; an accumulator for accumulating outputs of the demodulator during a cycle of the second clock signal to generate an accumulated acquisition value; and a comparator for comparing the accumulated acquisition value with a threshold value, generating an acquisition success signal if the accumulated acquisition value is greater than the threshold, and generating a hold signal if the accumulated acquisition value is less than the threshold,

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Gyeonggi-do, South Korea

Chae-Hag Yi