Search results for: Hyoung-Kyu Song

Items from 1 to 20 out of 102 results

article

Efficient relay selection scheme utilizing superposition modulation in cooperative communication

Seung-Jun Yu, Yeong-Seop Ahn, Sung-Bok Choi, Yeon-Kug Moon, more

Annals of Telecommunications > 2019 > 74 > 11-12 > 681-686

In this paper, a cooperative communication scheme is proposed utilizing superposition modulation (SM) in orthogonal frequency division multiplexing (OFDM). The proposed relay selection scheme selects an optimal relay and improves the BER performance by utilizing SM in cooperative communication. Also, the proposed cooperative communication scheme transmits the signal of source and relay at the same...

article

Cooperative communication system with multiple relays for performance improvement in wireless communication system

Chang-Hee Kang, Hyun-Jee Yang, Hyoung-Kyu Song

Journal of Ambient Intelligence and Humanized Computing > 2019 > 10 > 9 > 3461-3467

In a wireless communication system, a cooperative communication technique is a communication method for improving performance. In the conventional scheme, when a destination user is located in the cell boundary, one base station communicates with a destination user. At a same time, a destination user communicates with other base stations which cooperate with base station. If a distance between a base...

article

Cooperative communication system for high performance using ambient signals

Dong-Hyun Ha, Chang-Hee Kang, Won-Seok Lee, Hyoung-Kyu Song

Wireless Networks > 2019 > 25 > 5 > 2285-2290

This paper proposes the Internet connectivity of RF-powered devices in the backscatter system. The RF-powered devices do not use a battery and charge energy by harvesting from ambient RF signals of TV, a cellular phone and Wi-Fi devices. The Internet connectivity of the RF-powered devices in the backscatter system is very useful in Internet of things technology because the RF-powered devices which...

article

Inter-Relay Interference Cancellation Using MIMO Detection

Won-Seok Lee, Myoung-Jin Kim, Hyoung-Kyu Song

Wireless Personal Communications > 2018 > 98 > 2 > 1885-1894

Recent mobile applications have required high data rate. In metropolitan areas where data traffic is higher than other areas, heterogeneous networks (HetNet) are used to meet the traffic demand (Hoadley and Maveddat in IEEE Commun Mag 19(2):4–5, 2012). The HetNet has several low power base stations or remote radio heads in a macro cell coverage and sometimes coordinates the low power transmission...

article

A Channel Estimation and Data Transmission Scheme Utilizing Superposition Modulation for Cooperative Communication

Yeong-Seop Ahn, Jung-In Baik, Hyoung-Kyu Song

Wireless Personal Communications > 2018 > 98 > 1 > 1521-1530

In cooperative communication, the channel estimation is important because the channel influences the transmission signal. General channel estimation schemes are conducted before the information signal. But, the channel is time-varying, dynamic and unpredictable. To cope with a constantly changing channel, a new scheme is proposed. In the proposed scheme, the new transmission signal utilizing superposition...

article

An Improved Dual-Hop Transmission Method for High Reliability in Wireless Communication Networks

Young-Min Ko, Ji-Hun Giil, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 97 > 4 > 5941-5950

In this paper, a new dual-hop transmission scheme based on MIMO-OFDM is proposed in order to enhance the performance of cooperative scheme. This paper proposes improved cooperative dual-hop scheme which handles transmission schemes for three areas of the cell by changing transmission symbols. Since performance of wireless communication depends on channel states of cell area, the transmission can have...

article

Adaptive Femtocell Design Scheme in Mobile Communication Systems

Jae-Hyun Ro, Eui-Hak Lee, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 97 > 1 > 811-820

Mobile communication technologies have been evolving very rapidly and providing many advantages with mobile users. However, the amount of data traffic has increased significantly due to rapid expansion of mobile market. Recently, femtocell which is known as indoor base station is considered as the key solution to combat the data traffic. Femtocell provides mobile users with better quality of service...

article

An Improved Wireless Transmission Scheme in the Edge of Cell Coverage

Myoung-Jin Kim, Yeong-Seop Ahn, Dong-Sun Kim, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 97 > 1 > 675-682

In this paper, a new improved wireless transmission scheme is proposed for a wireless communication network. When the terminal is located in the edge of cell coverage, the transmitted signal is distorted by the interference and power reduction. In the proposed scheme, the terminal receives the signals through the multiple paths and pre-coded signal by the cooperative communication and the pre-coding...

article

Cooperative Transmission Scheme for Cell Interference Mitigation in Wireless Communication System

Dong-Hyun Ha, Yong-Jun Kim, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 97 > 1 > 723-732

In a wireless communication system, the performance is decreased by various interference and disturbance elements. In order to decrease the influence by these elements, the various schemes have been studied. In this paper, the method mitigating inter-cell interference (ICI) is proposed when a mobile user is located in the cell edge. ICI is one reason among the reasons of the performance reduction...

article

Variable Modulation Scheme for Improved Reliability in the OFDM Systems

Yong-Jun Kim, Chang-Bin Ha, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 97 > 1 > 603-611

In order to improve the reliability of the OFDM systems, this paper proposes the variable modulation scheme based on the condition of the channel between the transmitter and the receiver. The proposed scheme uses the codebook that is stored in advance at the transmitter and the receiver. The key idea of the variable modulation scheme is to use the similarity with the condition of the channel between...

article

A Multi-relay Cooperative Communication Using Space Time Spatial Phase Coding Based on OFDM

Seung-Jun Yu, Ki-Ro Kim, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 96 > 2 > 3127-3137

Among schemes to obtain diversity gain, space-time block code (STBC) and spatial phase coding (SPC) have been widely studied for the cooperative wireless relaying system. However, conventional STBC has a problem that cannot deal with change in the number of relays due to low throughput. In this paper, we propose a SPC that multi-relay transmission is possible and a space-time spatial phase coding...

article

Cooperative Transmission Scheme Using the Single Antenna in the Broadcasting and Cellular System

Hyun-Jee Yang, Bit-Na Kwon, Jung-In Baik, Hyoung-Kyu Song

Wireless Personal Communications > 2017 > 95 > 4 > 4049-4061

In this paper, the cellular system and broadcasting system use a cooperative transmission scheme. The conventional scheme is not consider the condition of a channel between a cellular base station (CBS) and a destination user. In this conventional scheme, two CBSs communicate with the user by the cooperative transmission scheme when the user is located in the cell edge. If CBS is distant from a user...

article

Frame and carrier frequency synchronization algorithm for wireless body area network

Byung‐Kyu Kim, Hyoung‐Kyu Song, Sung‐Il Seo, Young‐Hwan You

International Journal of Communication Systems > 30 > 3 > n/a - n/a

A wireless body area network (WBAN) is a radio‐frequency‐based wireless communication technology that consists of a number of different sensor and actuator nodes interconnected with a body gateway. Considering the constrained resources in WBAN devices, simple and noise‐robust synchronization algorithms are required. Frame synchronization and frequency offset estimation are extremely important in the...

article

Determination Scheme for Detection Thresholds Using Multiple Antennas in Wi-Fi Backscatter Systems

Won-Seok Lee, Chang-Hee Kang, Yeon-Kug Moon, Hyoung-Kyu Song

IEEE Access > 2017 > 5 > 22159 - 22165

In this paper, a detection scheme for the uplink transmission of Wi-Fi backscatter system is proposed. In the uplink transmission, a backscatter tag modulates signals from a Wi-Fi access point by backscattering. Since the reflection occurs, the backscattered signal experiences more attenuation than the direct Wi-Fi signals to a Wi-Fi reader. Most recent studies focus on effective detection techniques...

article

Signal Detection Scheme in Ambient Backscatter System With Multiple Antennas

Chang-Hee Kang, Won-Seok Lee, Young-Hwan You, Hyoung-Kyu Song

IEEE Access > 2017 > 5 > 14543 - 14547

The ambient backscatter technique is a communication technology that uses ambient radio frequency signals to enable battery-free devices to communicate with other device. This paper proposes the ambient backscatter technique using multiple antennas. Since the tag only plays a role of reflecting signals, a signal is transmitted with a power allocation in the case of multiple antennas. At the receiving...

article

Low‐complexity joint detection of carrier frequency offset and sector cell index for LTE cellular system

Byung‐Kyu Kim, Hyoung‐Kyu Song, Young‐Hwan You

International Journal of Communication Systems > 30 > 1 > n/a - n/a

In this paper, we propose a low‐complexity joint detection of sector cell index and integer carrier frequency offset for a long‐term evolution downlink system. In order to implement a low‐cost detection scheme, a primary synchronization signal used for joint parameter estimation is grouped into a number of subsets so that the pilots in each subset are strongly correlated. The estimation performance...

article

Adaptive Relay Selection and Data Transmission Scheme for Cooperative Communication

Yeong-Seop Ahn, Sung-Bok Choi, Junpyo Jeon, Hyoung-Kyu Song

Wireless Personal Communications > 2016 > 91 > 1 > 267-276

In this paper, an adaptive relay selection and transmission scheme are proposed for cooperative communication. As the conventional relay selection schemes, the best harmonic mean and the threshold-based relay selection scheme require channel state information (CSI) in advance at the source. By using CSI, they can select the optimal or the sub-optimal relay. But, the source does not know CSI as a priori...

chapter

Performance Enhancement Schemes of OFDMA System for Broadband Wireless Access

Dong-Hyun Park, So-Young Yeo, Jee-Hoon Kim, Young-Hwan You, more

Lecture Notes in Computer Science > Computational Science – ICCS 2007 > 344-351

Orthogonal frequency-division multiple access (OFDMA), which is a combination of orthogonal frequency-division multiplexing (OFDM) with frequency-division multiple access (FDMA), is regarded as a promising solution for enhancing the performance of interactive wireless systems in ubiquitous mobile communication environment. In such an application, this paper presents an investigation into improving...

chapter

Improved and Trustworthy Detection Scheme with Low Complexity in VBLAST System

So-Young Yeo, Myung-Sun Baek, Hyoung-Kyu Song

Lecture Notes in Computer Science > Autonomic and Trusted Computing > Intrusion Detection > 269-275

We provide a new detection scheme for interference nulling and cancellation operation in a vertical Bell laboratories layered space-time (VBLAST) system to reduce unexpected effects due to parallel transmission in this paper. This method can reduce the time delay as well as moderate the multipath fading effect. We will show that the performance of investigated VBLAST detection based on hybrid processing...

chapter

Performance Limitation of STBC OFDM-CDMA Systems in Mobile Fading Channels

Young-Hwan You, Tae-Won Jang, Min-Goo Kang, Hyung-Woo Lee, more

Lecture Notes in Computer Science > Computational Science and Its Applications – ICCSA 2004 > Information Systems and Information Technologies (ISIT) Workshop, Mobile Session > 386-393

Orthogonal frequency division multiplexing (OFDM) is sensitive to carrier frequency offset and channel estimation error, which destroy the subcarrier orthogonality and give rise to intercarrier interference (ICI). This paper addresses the performance degradation due to imperfect parameters in an orthogonal frequency and code division multiplexing (OFDM-CDMA) system with multiple transmit antennas...

Publication date

Set your own date range

Content availability

Available (101)
None (1)

Publication type

article (57)
book (45)

Keywords

OFDM (37)
OFDM MODULATION (36)
BIT ERROR RATE (23)
COOPERATIVE COMMUNICATION (20)
RELAYS (19)
SIGNAL TO NOISE RATIO (19)
CHANNEL ESTIMATION (15)
DIVERSITY RECEPTION (15)
MIMO COMMUNICATION (12)
ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (12)
SYNCHRONIZATION (12)
TRANSMITTING ANTENNAS (12)
WIRELESS COMMUNICATION (12)
ERROR STATISTICS (11)
FREQUENCY ESTIMATION (11)
COMPLEXITY THEORY (10)
ESTIMATION (9)
MIMO (9)
RECEIVERS (9)
FADING (8)
FADING CHANNELS (8)
TELECOMMUNICATION NETWORK RELIABILITY (8)
ULTRA WIDEBAND COMMUNICATION (8)
AWGN (7)
CDD (7)
DIGITAL VIDEO BROADCASTING (7)
PROTOCOLS (7)
MOBILE COMMUNICATION (6)
APPROXIMATION METHODS (5)
BER (5)
COOPERATIVE DIVERSITY NETWORKS (5)
FREQUENCY DIVISION MULTIPLE ACCESS (5)
MIMO-OFDM (5)
MIMO-OFDM SYSTEMS (5)
PHASE SHIFT KEYING (5)
RADIO NETWORKS (5)
RAYLEIGH CHANNELS (5)
RELIABILITY (5)
SINGLE ANTENNA (5)
AMPLIFY-AND-FORWARD PROTOCOL (4)
ANTENNA ARRAYS (4)
ANTENNAS (4)
CHANNEL STATE INFORMATION (4)
DECODING (4)
DELAY (4)
DIVERSITY GAIN (4)
FREQUENCY CONVERSION (4)
FREQUENCY DOMAIN ANALYSIS (4)
FREQUENCY SYNCHRONIZATION (4)
INDEXES (4)
MAXIMUM LIKELIHOOD ESTIMATION (4)
MODULATION (4)
MULTIMEDIA COMMUNICATION (4)
NOISE (4)
OFDM SYSTEM (4)
OFDMA (4)
PERSONAL AREA NETWORKS (4)
RECEIVING ANTENNAS (4)
SIGNAL DETECTION (4)
SIGNAL PROCESSING (4)
SIGNAL PROCESSING ALGORITHMS (4)
SYNCHRONISATION (4)
TIME FREQUENCY ANALYSIS (4)
TRANSMITTERS (4)
WIRELESS COMMUNICATION SYSTEM (4)
ADDITIVES (3)
AMBIENT BACKSCATTER (3)
BROADCASTING (3)
CAZAC (3)
CHANNEL CODING (3)
COMPUTATIONAL COMPLEXITY (3)
CORRELATION (3)
DETECTORS (3)
DISTRIBUTED ALAMOUTI CODE (3)
DIVERSITY (3)
DUAL CARRIER MODULATION (3)
FREQUENCY DIVERSITY (3)
FREQUENCY DIVISION MULTIPLEXING (3)
HIERARCHICAL MODULATION (3)
INTEGER FREQUENCY OFFSET ESTIMATION (3)
MAI (3)
MB-OFDM (3)
MEAN SQUARE ERROR METHODS (3)
MIMO SYSTEMS (3)
MULTIPATH CHANNELS (3)
MULTIPATH FADING CHANNELS (3)
MULTIPLE ANTENNAS (3)
PEAK TO AVERAGE POWER RATIO (3)
PEAK-TO-AVERAGE POWER RATIO (3)
PROBABILITY (3)
QUADRATURE AMPLITUDE MODULATION (3)
QUALITY OF SERVICE (3)
RELAY SELECTION (3)
RESOURCE MANAGEMENT (3)
SAMPLING METHODS (3)
SPACE-TIME CODES (3)
SPATIAL MULTIPLEXING (3)
STBC (3)
THROUGHPUT (3)
TIME DOMAIN ANALYSIS (3)
more

Data set

ieee (66)
Springer (33)
Wiley (3)

Journal

Wireless Personal Communications (18)
IEEE Transactions on Consumer Electronics (12)
IEEE Transactions on Broadcasting (5)
IEEE Transactions on Communications (4)
Electronics Letters (3)
IEEE Transactions on Wireless Communications (3)
IEEE Access (2)
IEEE Communications Letters (2)
International Journal of Communication Systems (2)
Annals of Telecommunications (1)
IEEE Signal Processing Letters (1)
IEEE Transactions on Vehicular Technology (1)
Journal of Ambient Intelligence and Humanized Computing (1)
Wireless Communications and Mobile Computing (1)
Wireless Networks (1)
more

INFONA - science communication portal

Search results for: Hyoung-Kyu Song

Efficient relay selection scheme utilizing superposition modulation in cooperative communication

Cooperative communication system with multiple relays for performance improvement in wireless communication system

Cooperative communication system for high performance using ambient signals

Inter-Relay Interference Cancellation Using MIMO Detection

A Channel Estimation and Data Transmission Scheme Utilizing Superposition Modulation for Cooperative Communication

An Improved Dual-Hop Transmission Method for High Reliability in Wireless Communication Networks

Adaptive Femtocell Design Scheme in Mobile Communication Systems

An Improved Wireless Transmission Scheme in the Edge of Cell Coverage

Cooperative Transmission Scheme for Cell Interference Mitigation in Wireless Communication System

Variable Modulation Scheme for Improved Reliability in the OFDM Systems

A Multi-relay Cooperative Communication Using Space Time Spatial Phase Coding Based on OFDM

Cooperative Transmission Scheme Using the Single Antenna in the Broadcasting and Cellular System

Frame and carrier frequency synchronization algorithm for wireless body area network

Determination Scheme for Detection Thresholds Using Multiple Antennas in Wi-Fi Backscatter Systems

Signal Detection Scheme in Ambient Backscatter System With Multiple Antennas

Low‐complexity joint detection of carrier frequency offset and sector cell index for LTE cellular system

Adaptive Relay Selection and Data Transmission Scheme for Cooperative Communication

Performance Enhancement Schemes of OFDMA System for Broadband Wireless Access

Improved and Trustworthy Detection Scheme with Low Complexity in VBLAST System

Performance Limitation of STBC OFDM-CDMA Systems in Mobile Fading Channels

Filter options

Publication date

Content availability

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Hyoung-Kyu Song

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Content availability

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options