Design of DDFS-driven PLL frequency synthesizer with reduced complexity. - Heung-Gyoon Ryu; Yun-Young Kim; Hyeong-Man Yu; Sang Burm Ryu (IEEE Trans. Consumer Electron., 2001)

DLT replacement and synchronization in the digital hybrid PLL frequency synthesizer. - Heung-Gyoon Ryu; Eung-jin Ahn (IEEE Trans. Consumer Electron., 2002)

PAPR reduction using soft clipping and ACI rejection in OFDM system. - Heung-Gyoon Ryu; Byoung-Ii Jin; In-Bae Kim (IEEE Trans. Consumer Electron., 2002)

A new triple-controlled type frequency synthesizer using simplified DDFS-driven digital hybrid PLL system. - Heung-Gyoon Ryu; Yun-Young Kim; Hyeong-Man Yu; Hyun-Seok Lee (IEEE Trans. Consumer Electron., 2002)

Analysis and minimization of phase noise of the digital hybrid PLL frequency synthesizer. - Heung-Gyoon Ryu; Hyun-Seok Lee (IEEE Trans. Consumer Electron., 2002)

A new PAPR reduction scheme: SPW (subblock phase weighting). - Heung-Gyoon Ryu; Kyoung-Jae Youn (IEEE Trans. Consumer Electron., 2002)

A new combined method of the block coding and predistortion for the nonlinear distortion compensation. - Heung-Gyoon Ryu; Yun-Hee Lee (IEEE Trans. Consumer Electron., 2003)

Phase noise analysis of the OFDM communication system by the standard frequency deviation. - Heung-Gyoon Ryu; Ying-Shan Lee (IEEE Trans. Consumer Electron., 2003)

Analysis of switching characteristics of the digital hybrid PLL frequency synthesizer. - Heung-Gyoon Ryu; Hyun-Seok Lee (IEEE Trans. Veh. Technol., 2003)

Performance of DS/SFH-SSMA system with overlapping BFSK in the presence of both MTJ and MAI. - Heung-Gyoon Ryu; Jeong-Min Park; Kie-Keun Kim; Young-Kyun Choi (IEEE Trans. Veh. Technol., 2003)

Threshold IBO of HPA in the predistorted OFDM communication system. - Heung-Gyoon Ryu; Ju Sok Park; Jin-Soo Park (IEEE Trans. Broadcast., 2004)

BER analysis of clipping process in the forward link of the OFDM-FDMA communication system. - Heung-Gyoon Ryu; Tran Phuong Hoa; Nguyen Thanh Hieu; Jin Jianxue (IEEE Trans. Consumer Electron., 2004)

Improvement of power efficiency of HPA by the PAPR reduction and predistortion. - Heung-Gyoon Ryu; Tran Phuong Hoa; Kang Mi Lee; Sang-Woo Kim; Jin-Soo Park (IEEE Trans. Consumer Electron., 2004)

Nonlinear analysis of the phase noise in the OFDM communication system. - Heung-Gyoon Ryu; Yingshan Li; Jin-Soo Park (IEEE Trans. Consumer Electron., 2004)

Dummy sequence insertion (DSI) for PAPR reduction in the OFDM communication system. - Heung-Gyoon Ryu; Jae-Eun Lee; Jin-Soo Park (IEEE Trans. Consumer Electron., 2004)

Effects of frequency instability caused by phase noise on the performance of the fast FH communication system. - Heung-Gyoon Ryu; Yingshan Li; Jin-Soo Park (IEEE Trans. Veh. Technol., 2004)

Design of Binary Multi-code CDMA System with Constant Amplitude. - Jin Kwan Kim; Sang-Woo Kim; Kee-Hoo Yoon; Heung-Gyoon Ryu (ICITA (2), 2005)

A PAPR Reduction Method Using the Correlation of Information in OFDM Communication System. - Sang-Woo Kim; Hun-Hee Lee; Chan-Ho Park; Rag Gyu Jung; Heung-Gyoon Ryu (ICITA (2), 2005)

PAPR Reduction in MC/DS CDMA System by DFT Spreading Codes. - Yingshan Li; Ju-Hyun Kyung; Jong-Won Son; Heung-Gyoon Ryu (ICITA (2), 2005)

An Improved ICI Reduction Method in OFDM Communication System. - Heung-Gyoon Ryu; Yingshan Li; Jin-Soo Park (IEEE Trans. Broadcast., 2005)

PAPR reduction of the low complexity phase weighting method in OFDM communication system. - Nguyen Thanh Hieu; Sang-Woo Kim; Heung-Gyoon Ryu (IEEE Trans. Consumer Electron., 2005)

A PAPR Reduction of MC-DS-CDMA Signal by Spectrum Phase Control (SPC) Method. - Heung-Gyoon Ryu; Nguyen Thanh Hieu; David Tien (ICC, 2006)

A Study on the CI-OFDM Communication System for the High Quality and High Speed Communication System. - Heui-Seop Byeon; Jin-Kook Chung; Heung-Gyoon Ryu (WASA, 2006)

Design and Analysis of Side Information Embedded PTS Scheme in the OFDM Communication System. - Seon-Ae Kim; Heung-Gyoon Ryu (WASA, 2006)

Power spectrum analysis of the cross/intermodulation in the nonlinear LNA. - Heung-Gyoon Ryu; Heui-Seop Byeon; Jin Kwan Kim (IEEE Trans. Veh. Technol., 2006)

The Impact of the I/Q Mismatching Errors on the BER Performance of OFDM Communication Systems. - Nguyen Thanh Hieu; Heung-Gyoon Ryu; Cheng-Xiang Wang 001; Hsiao-Hwa Chen (ICC, 2007)

Design and Performance Analysis of the SPW Method for PAPR Reduction in OFDM Systems. - Heung-Gyoon Ryu; Sang Burm Ryu (ICC, 2008)

System design and analysis of MIMO SFBC CI-OFDM system against the nonlinear distortion and narrowband interference. - Heung-Gyoon Ryu (IEEE Trans. Consumer Electron., 2008)

Analysis and Suppression of MAI in WiMAX Uplink Communication System with Multiple CFOs. - Xiupei Zhang; Heung-Gyoon Ryu (AccessNets, 2009)

Hybrid ARQ with Rate Adaptation in Multiband OFDM UWB Systems. - Cheng-Xiang Wang 001; Heung-Gyoon Ryu; Hsiao-Hwa Chen; Yejun He (ICC, 2009)

Detecting TCP Traffic Dynamical Changes in UMTS Networks. - Ioannis Vasalos; Averkios Vasalos; Heung-Gyoon Ryu (BROADNETS, 2010)

Suppression of carrier frequency offset and phase noise in adaptive bit loading OFDM system. - Haeseong Jeong; Heung-Gyoon Ryu; Jin-Up Kim (ICTC, 2010)

Analysis of FH multi-user DFT spreading OFDM system for anti-jamming. - Jangsu Kim; Heung-Gyoon Ryu (ICTC, 2010)

A Time Domain Inverse Matrix Receiver for CFO Suppression in WIMAX Uplink System. - Xiupei Zhang; Heung-Gyoon Ryu; Jason Gao (VTC Spring, 2010)

Inter-subcarrier interference compensation in the frequency-hopped single-carrier frequency division multiple access communication system. - J. Kim; Heung-Gyoon Ryu (IET Commun., 2010)

Joint estimation and suppression of phase noise and carrier frequency offset in multiple-input multiple-output single carrier frequency division multiple access with single-carrier space frequency block coding. - Xiupei Zhang; Heung-Gyoon Ryu (IET Commun., 2010)

ICI problem and compensation in MIMO SC-FDMA system with SC-SFBC scheme. - Xiupei Zhang; Heung-Gyoon Ryu (Int. J. Commun. Syst., 2010)

Suppression of ICI and MAI in SC-FDMA communication system with carrier frequency offsets. - Xiupei Zhang; Heung-Gyoon Ryu (IEEE Trans. Consumer Electron., 2010)

Power Model and Analysis of Wireless Transceiver System. - Jae Hoon Choi; Heung-Gyoon Ryu (FGIT-FGCN (2), 2011)

Efficient Doppler Spread Compensation with Frequency Domain Equalizer and Turbo Code. - Haeseong Jeong; Heung-Gyoon Ryu (FGIT-MulGraB (2), 2011)

LDPC Equalizer for Compensating the CFO and Phase Noise in OFDM System. - Do-Hoon Kim; Heung-Gyoon Ryu (FGIT-FGCN (2), 2011)

ICI Suppression in the SC-FDMA Communication System with Phase Noise. - Heung-Gyoon Ryu (FGIT-MulGraB (1), 2011)

Combination of QAPM and OFDM for high power efficiency and spectral efficiency. - Jae Hoon Choi; Haeseong Jeong; Heung-Gyoon Ryu (GLOBECOM Workshops, 2011)

Wireless Multimedia Acoustic Transmission with MIMO-OFDM. - Junyeong Bok; Heung-Gyoon Ryu (ICHIT (1), 2011)

Quadrature Amplitude Position Modulation Combined with Multicarrier Communication System. - Jae Hoon Choi; Heung-Gyoon Ryu (ICHIT (1), 2011)

High Power Efficiency and Low Nonlinear Distortion for Wireless Visible Light Communication. - Sang Burm Ryu; Jae Hoon Choi; Junyeong Bok; HuiKyu Lee; Heung-Gyoon Ryu (NTMS, 2011)

Design and performance analysis of QAPM modulation in multi-path channel. - Jae Hoon Choi; Heung-Gyoon Ryu (WOCN, 2011)

Adaptive equalizer and compensation of ICI in the wireless repeater system. - Haeseong Jeong; Heung-Gyoon Ryu (WOCN, 2011)

Group-oriented multiuser beamforming-OFDM for different QoS requirement. - Dong Hyung Lee; HuiKyu Lee; Heung-Gyoon Ryu (WOCN, 2011)

A fast and efficient adaptive channel equalizer for OFDM-based wireless relay system. - Faramarz Asharif; Shiro Tamaki; Mohammad Reza Alsharif; Heung-Gyoon Ryu (WTS, 2011)

An efficient correction of carrier frequency offset and sample timing offset by feedback method. - HuiKyu Lee; Heung-Gyoon Ryu (WTS, 2011)

Combination of PAPR reduction and linearization for the OFDM communication system. - Heung-Gyoon Ryu (Wirel. Commun. Mob. Comput., 2011)

Closed-loop satellite communication system for high efficiency transmission. - Junyeong Bok; Heung-Gyoon Ryu; Byung Gak Jo; Gwang Hoon Baek (APCC, 2012)

Adaptive NLMS pre-distorter of HPA with memory effect. - Junyeong Bok; Dong Geon An; Byung Gak Jo; Gwang Hoon Baek; Heung-Gyoon Ryu (CHINACOM, 2012)

Carrier Aggregation Receiver with Beamformer and Compensation of Doppler Effects and Timing Offset. - Xin Wang; Heung-Gyoon Ryu (FGIT-FGCN/DCA, 2012)

Analysis and suppression of effects of CFO and phase noise in WFMT modulation for vehicular communications. - Junyeong Bok; Seon-Ae Kim; Heung-Gyoon Ryu (ICC, 2012)

Analysis of Receiver Feedback Closed Loop Pre-distortion to Compensate for Nonlinear HPA and Foliage Attenuation. - Junyeong Bok; Heung-Gyoon Ryu (ICHIT (1), 2012)

Synchronization Control and Compensation of STO and CFO by Sub-Sampling Method. - Xin Wang; Heung-Gyoon Ryu (ICHIT (2), 2012)

Power analysis and communication capacity of 160GHz wireless communication in multipath environment. - Jae Hoon Choi; Junyeong Bok; Heung-Gyoon Ryu (ICOIN, 2012)

Doppler spread and its compensation by FDE and turbo code. - Haeseong Jeong; Do-Hoon Kim; Heung-Gyoon Ryu (ICOIN, 2012)

Improvement and comparison of Modulus Algorithm Blind Equalizer learning curve in time and frequency domain. - Faramarz Asharif; Shiro Tamaki; Mohammad Reza Alsharif; Heung-Gyoon Ryu (ICTC, 2012)

Mitigation of multipath in steel wall channel of ultrasonic communication system. - Junyeong Bok; Heung-Gyoon Ryu (ICTC, 2012)

Performance evaluation of chaotic CDSK modulation system with different chaotic maps. - Chan-Ho Jin; Heung-Gyoon Ryu (ICTC, 2012)

Analysis and design of QAPM modulation based on multi-carrier using compressive sensing for low power communication. - So-Ra Kim; Heung-Gyoon Ryu (ICTC, 2012)

Analysis and performance evaluation of turbo equalizer for fast equalization in single-carrier system. - Do-Hoon Kim; Heung-Gyoon Ryu; Tharek Abdul Rahman (ICTC, 2012)

Timing offset and frequency offsets in muti-band receiver system. - Xin Wang; Heung-Gyoon Ryu (ICTC, 2012)

Analysis and design of QAPM modulation using compressive sensing for low power communication. - So-Ra Kim; Heung-Gyoon Ryu (MILCOM, 2012)

Research on secure data collection in wireless multimedia sensor networks. - Kai Lin; Xiaohu Ge; Xiaofei Wang; Chunsheng Zhu; Heung-Gyoon Ryu (Comput. Commun., 2012)

Multicarrier-Based QAPM Modulation System for the Low Power Consumption and High Data Rates. - Jae Hoon Choi; Heung-Gyoon Ryu; Xuedong Liang (Mob. Networks Appl., 2012)

On the Performance of Covariance Based Spectrum Sensing for Cognitive Radio. - Ming Jin 001; Youming Li; Heung-Gyoon Ryu (IEEE Trans. Signal Process., 2012)

Chaotic Wireless Communication System Using Retrodirective Array Antenna for Advanced High Security. - Junyeong Bok; Heung-Gyoon Ryu (GPC, 2013)

Improvement of the MCMA Blind Equalization Performance Using the Coordinate Change Method in 16-APSK. - Youngguk Kim; Heung-Gyoon Ryu (GPC, 2013)

Automatic Tracking Angle of Arrival of Bandpass Sampling OFDM Signal by MUSIC Algorithm. - Xin Wang; Heung-Gyoon Ryu (GPC, 2013)

Neural network target classification for Concealed Weapon radar detection. - Averkios Vasalos; Nikolaos K. Uzunoglu; Heung-Gyoon Ryu; Ioannis Vasalos (DSP, 2013)

Performance evaluation of DCSK system with chaotic maps. - Suwa Kim; Junyeong Bok; Heung-Gyoon Ryu (ICOIN, 2013)

An efficient blind turbo equalizer for compensating Doppler effects. - Do-Hoon Kim; Heung-Gyoon Ryu (ICOIN, 2013)

Simultaneous single-band duplex system using self-interference cancellation. - Changyoung An; Heung-Gyoon Ryu (ICTC, 2013)

A new receiver design of CDSK-based chaos communication system. - Jun-Hyun Lee; Heung-Gyoon Ryu (ICTC, 2013)

Separation of coherent signals using a novel MUSIC algorithm in multipath environments. - Xin Wang; Heung-Gyoon Ryu (ICTC, 2013)

Performance and stability analysis of wireless Tele-Control system. - Faramarz Asharif; Shiro Tamaki; Tsutomu Nagado; Mohammad Reza Alsharif; Heung-Gyoon Ryu (ISPACS, 2013)

High Security Wireless CDSK-Based Chaos Communication with New Chaos Map. - Heung-Gyoon Ryu; Jun-Hyun Lee (MILCOM, 2013)

Performance Analysis of Digital Retrodirective Array Antenna System in Presence of Frequency Offset. - Junyeong Bok; Heung-Gyoon Ryu (MUE, 2013)

Blind Beamforming Using the MCMA and SAG-MCMA Algorithm with MUSIC Algorithm. - Youngguk Kim; Heung-Gyoon Ryu (MUE, 2013)

Application of full-duplex wireless communication system on echo cancellation. - Faramarz Asharif; Shiro Tamaki; Mohammad Reza Alsharif; Heung-Gyoon Ryu (WCNC, 2013)

Frequency domain compressive sensing of multicarrier-based QAPM system. - So-Ra Kim; Heung-Gyoon Ryu (WCNC, 2013)

A new physical layer transmission scheme for LPI and high throughput in the cooperative SC-FDMA system. - Yingshan Li; Chao Wu; Dongyan Sun; Junli Xia; Heung-Gyoon Ryu (J. Commun. Networks, 2013)

SNR Estimation in OFDM System by the Correlation of Decision Feedback Signal. - Seon-Ae Kim; Junyeong Bok; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2013)

Analysis and suppression of phase noise and IQ imbalance for dual-band MIMO-OFDM. - Junyeong Bok; Heung-Gyoon Ryu (ICOIN, 2014)

Beamspace MIMO system with different elements distances in ESPAR array antenna. - Bong-Jun Kim; Heung-Gyoon Ryu (ICOIN, 2014)

A novel reactance domain MUSIC algorithm for direction of arrival estimation using 13-element ESPAR antennas. - Xin Wang; Bong-Jun Kim; Heung-Gyoon Ryu (ICOIN, 2014)

Design and performance evaluation of SSD (simultaneous single band duplex) system using RF cancellation and digital cancellation. - Changyoung An; Heung-Gyoon Ryu (ICTC, 2014)

Self-interference cancellation using Mach-Zehnder Modulator for Full-Duplex communication. - Bong-Jun Kim; Heung-Gyoon Ryu (ICTC, 2014)

Design and evaluation of single RF OFDMMIMO based on time division multiplexing. - Bong-Jun Kim; Sung-Kyu Kim; Sung Wook Yoon; Heung-Gyoon Ryu; Seung Hwan Lee; Dong-Jin Shin (ISCIT, 2014)

Design and performance analysis of beamspace MIMO system for multi-carrier transmission. - Bong-Jun Kim; Heung-Gyoon Ryu; Seung Hwan Lee; Dong-Jin Shin (ISCIT, 2014)

General dimension of BS-MIMO by extension of parasitic elements in ESPAR antenna. - Changyoung An; Sung Wook Yoon; Heung-Gyoon Ryu (CCNC, 2015)

A reactance domain fourth-order MUSIC algorithm using 13-element ESPAR antenna. - Bong-Jun Kim; Changyoung An; Heung-Gyoon Ryu (CCNC, 2015)

Wireless information security improvement with chaotic high order modulation. - Jun-Hyun Lee; Heung-Gyoon Ryu (CCNC, 2015)

Robust Digital Retrodirective Beamforming Technique for Multipath Channel Environment. - Changyoung An; Kukhan Jang; Heung-Gyoon Ryu; Jin-Kyu Choi; Hanbyeog Cho (FNC/MobiSPC, 2015)

Analysis of boss map according to delay time in CDSK system and proposed chaos system. - Jun-Hyun Lee; Changyoung An; Bong-Jun Kim; Heung-Gyoon Ryu (ICCE, 2015)

A Novel CFO Suppression Algorithm for OFDMA Uplink Communication System. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2015)

Two Separate Antennas Simultaneous Single Band Duplex (SSD) System Using Turbo Equalizer. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2015)

Design and Performance Analysis of Beam-Space MIMO System for Multi-carrier Transmission. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2015)

Beamspace MIMO System Using Chaos BPSK Modulation. - Jun-Hyun Lee; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2015)

Single RF based MIMO system using load-modulation. - Changyoung An; Heung-Gyoon Ryu; Seung Hwan Lee (CCNC, 2016)

Load modulation based MIMO communication for the low complexity and low power consumption. - Changyoung An; Heung-Gyoon Ryu; Seung Hwan Lee; Masahiro Umehira; Tokumi Yokohira (ICCE, 2016)

Design of W-OFDM and nonlinear performance comparison for 5G waveform. - Changyoung An; Byeongjae Kim; Heung-Gyoon Ryu (ICTC, 2016)

Design and Beamforming Performance of the Compact ESPAR Antenna for the Beam Space MIMO System. - Heung-Gyoon Ryu; Changyoung An; Seung Hwan Lee (Wirel. Pers. Commun., 2016)

NW-OFDM using cyclic postfix and windowing for the eMBB waveform of the 5G/B5G mobile system. - Changyoung An; Heung-Gyoon Ryu; Yingshan Li; Mohammad Reza Asharif (ICTC, 2017)

Turbo equalizer design and performance evaluation of 8PSK-TCM based satellite receiver system. - Changyoung An; Heung-Gyoon Ryu; Sang Burm Ryu; Sang-Gyu Lee (ICTC, 2017)

Performance evaluation of dual-band polar transmitter architecture for the connected car. - Jin-Kyu Choi; Byungtae Jang; Heung-Gyoon Ryu (ICTC, 2017)

Spectrum characteristics and predistortion gain in the nonlinear high power amplifier(HPA). - Kyeongsoo Jang; Heung-Gyoon Ryu; Sang Burm Ryu; Sang-Gyu Lee (ICTC, 2017)

Performance comparison between wavelet-based OFDM system and iFFT-based OFDM system. - Jungu Lee; Heung-Gyoon Ryu (ICTC, 2017)

WR-OFDM system and OOB spectrum comparison. - Changyoung An; Byeongjae Kim; Heung-Gyoon Ryu (ICUFN, 2017)

Double Balanced Feed Network for the Self-Interference Cancellation in Full Duplex Communication System. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2017)

Ripple Window OFDM (RW-OFDM) System for Improvement of Spectrum Resource Utilization. - Changyoung An; Dayoung Kim; Heung-Gyoon Ryu (ICTC, 2018)

Waveform Design of DFT-Spread WR-OFDM System for the OOB and PAPR Reduction. - Md. Najmul Hossain; Tetsuya Shimamura; Dayoung Kim; Heung-Gyoon Ryu (ICTC, 2018)

Design and Comparison of Discrete Wavelet Transform Based OFDM (DWT-OFDM) System. - Jungu Lee; Heung-Gyoon Ryu (ICUFN, 2018)

Spectrum Efficient and Power Efficient Communication System for Satellite Applications. - Changyoung An; Heung-Gyoon Ryu (IMCOM, 2018)

CPW-OFDM(Cyclic Postfix Windowing OFDM) for the B5G (Beyond 5th Generation) Waveform. - Changyoung An; Heung-Gyoon Ryu (LATINCOM, 2018)

Design and Performance Evaluation of Dual Mode OFDM-DIM and OFDM-CDIM Systems. - Changyoung An; Dayoung Kim; Heung-Gyoon Ryu (WPMC, 2018)

Design and Performance Comparison of W-OFDM Under the Nonlinear HPA Environment. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2018)

Design and Performance Evaluation of Spectral Efficient Orthogonal Time Frequency Space System. - Changyoung An; Heung-Gyoon Ryu (5G World Forum, 2019)

Design and Performance Evaluation of SW(Single extension Windowing)-Based CP-OFDM System for the Sharp OOB Spectrum. - Byounghak Park; Heung-Gyoon Ryu (5G World Forum, 2019)

Design and Mobile Tracking Performance of a Retro-Directive Array (RDA) Antenna System. - Myunggi Kim; Taebum Gu; Heung-Gyoon Ryu (ADHOCNETS, 2019)

Window Processing of SSB CP-OFDM System for the OOB Spectrum Reduction. - Kyeongsoo Jang; Dayoung Kim; Changyoung An; Heung-Gyoon Ryu (ICEIC, 2019)

Trade-Off Characteristic between BER Performance and OOB Power Emission in WR-OFDM System. - Dayoung Kim; Heung-Gyoon Ryu (ICTC, 2019)

Effective Self-Interference Cancellation for IBFD (In-Band Full Duplex) Communication System. - Myunggi Kim; Changyoung An; Heung-Gyoon Ryu (ICUFN, 2019)

4D-8PSK-TCM System for the Specrum and Power Efficient Satellite Communication. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2019)

High Throughput Mobile Communication Based on OTFS System with the Delay-Doppler Compensation. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2019)

Compensation System Design and Comparison of Very High Doppler Frequency Effect. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2019)

A Multi-mode OFDM System with Coded Direct Index Modulation (MM-OFDM-CDIM). - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2019)

Compensation Systems and Performance Comparison of the Very High Doppler Frequency. - Changyoung An; Heung-Gyoon Ryu (COMNET, 2020)

Performance Evaluation of OTFS Communication System in Doubly Selective Channel. - Byounghak Park; Heung-Gyoon Ryu (FNC/MobiSPC, 2020)

Multi-Mode OFDM Communication System Using the Multiple Constellations. - Changyoung An; Heung-Gyoon Ryu (ICOIN, 2020)

Receiver Design of the WR-OFDM System Robust to Long Delay Multipath. - Changyoung An; Hyeong Min Kwon; Heung-Gyoon Ryu (ICTC, 2020)

SFFT-Based OTFS Communication System Robust to High Doppler and Long Delay Channel. - Byounghak Park; Hyeong Min Kwon; Heung-Gyoon Ryu (ICTC, 2020)

Bandwidth Expansion of the IBFD Communication System Using Balanced Feed Networks. - Myunggi Kim; Heung-Gyoon Ryu (VTC Spring, 2020)

Dimension Expansion of OFDM System for the Spectral Efficiency Improvement. - Changyoung An; Heung-Gyoon Ryu (WCNC Workshops, 2020)

Waveform Design of Low Complexity WR-OTFS System for the OOB Power Reduction. - Md. Najmul Hossain; Yosuke Sugiura; Tetsuya Shimamura; Heung-Gyoon Ryu (WCNC Workshops, 2020)

Spectrum Efficient Multidimensional OFDM-CDIM Communication System. - Changyoung An; Heung-Gyoon Ryu (WPMC, 2020)

Design and Performance Evaluation of Multidimensional OFDM System. - Changyoung An; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2020)

DFT-Spread OTFS Communication System with the Reductions of PAPR and Nonlinear Degradation. - Md. Najmul Hossain; Yosuke Sugiura; Tetsuya Shimamura; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2020)

Vehicle Speed Control and Security System. - Toufiq Aziz; Tarek Mahmud Faisal; Heung-Gyoon Ryu; Md. Najmul Hossain (ICEIC, 2021)

Lowest-In First-Service System for the Efficient MPT (Microwave Power Transfer) to Multiple Receivers. - Changyoung An; Hyeong Min Kwon; Heung-Gyoon Ryu (ICOIN, 2021)

Selective Beam Switching System for Wireless Sensor Network Communication. - Toufiq Aziz; Heung-Gyoon Ryu (ICTC, 2021)

Performance Evaluation of OFDM Hybrid Number and Index Modulation for 6G Mobile System. - Mohammad Tanvir Mahmud; Heung-Gyoon Ryu (ICTC, 2021)

Compact Multiple Wideband Slotted Circular Patch Antenna for Satellite and Millimeter-Wave Communications. - Md. Moklesur Rahman; Heung-Gyoon Ryu (ICTC, 2021)

UHF RFID Wireless Communication System for Real Time ECG Monitoring. - Md. Moklesur Rahman; Toufiq Aziz; Heung-Gyoon Ryu (ICUFN, 2021)

POSTER: RFID Based WSN Communication System in Interference Channel. - Md. Moklesur Rahman; Heung-Gyoon Ryu (LANMAN, 2021)

Multiple-input multiple-output system design of multidimensional orthogonal frequency division multiplexing system with coded direct index modulation. - Changyoung An; Heung-Gyoon Ryu (Trans. Emerg. Telecommun. Technol., 2021)

Advanced OTFS communication system with compact spectrum and power efficiency improvement. - Md. Najmul Hossain; Heung-Gyoon Ryu (Int. J. Commun. Syst., 2021)

2x2 Array Design of ESPAR Antenna for IoT Communication System. - Md. Moklesur Rahman; Heung-Gyoon Ryu (APCC, 2022)

Ambient Backscatter Communication System Utilizing Multicarrier Signal. - Changyoung An; Hyeong Min Kwon; Heung-Gyoon Ryu (CCNC, 2022)

Efficient Wireless MPT(Microwave Power Transfer) System to the Multiple IoT Devices. - Changyoung An; Hyeong Min Kwon; Heung-Gyoon Ryu (ICEIC, 2022)

Design of Ultra-Wideband Patch Antenna for Multiple Communication Services. - Md. Moklesur Rahman; Heung-Gyoon Ryu (ICEIC, 2022)

Beamforming Design of the Wireless Power Transfer System into Multiple IoT Sensors. - Changyoung An; Hyeong Min Kwon; Heung-Gyoon Ryu (ICACT, 2022)

Selective Beam Switching System for RFID based WSN Communication. - Toufiq Aziz; Heung-Gyoon Ryu (ICCE, 2022)

ESPAR Antenna Design for the Interference Mitigation in WSN Communication System. - Toufiq Aziz; Heung-Gyoon Ryu (ICOIN, 2022)

Wireless PLL Communication System for Next Generation loT Application. - Md. Moklesur Rahman; Heung-Gyoon Ryu (ICTC, 2022)

Design of Middle Range Microwave Power Transfer (MPT) System for the Mobile Power Receiver. - Changyoung An; Heung-Gyoon Ryu (ICUFN, 2022)

RFID based IoT Sensor Communication System with ESPAR Antenna. - Md. Moklesur Rahman; Heung-Gyoon Ryu (WPMC, 2022)

IoT Sensor Network Using ESPAR Antenna Based on Beam Scanning Method for Direction Finding. - Md. Moklesur Rahman; Heung-Gyoon Ryu (Sensors, 2022)

Flexible TDMA System for the Efficient Microwave Power Transmission to Multiple Power Receiver. - Dayoung Kim; Heung-Gyoon Ryu (Wirel. Pers. Commun., 2022)

Interference-Robust OFDM Communication System using Weight Functions. - Kirill Vanin; Heung-Gyoon Ryu; Ansar R. Safin; Oleg V. Kravchenko (ICAIIC, 2023)

OCDM System with PAPR Reduction for Sub-THz Wireless Communication. - Md. Moklesur Rahman; Heung-Gyoon Ryu (ICTC, 2023)

Power Efficient Long Range IoT Communication of Wireless PPM System in ISM Band. - Md. Moklesur Rahman; Heung-Gyoon Ryu (ICUFN, 2023)

ESPAR array design for the UHF RFID wireless sensor communication system. - Md. Moklesur Rahman; Heung-Gyoon Ryu (Int. J. Commun. Syst., 2023)

Design and Evaluation of OTSM(Orthogonal Time Sequency Multiplexing) Communication System in Rayleigh Fading Channel. - Kirill Vanin; Heung-Gyoon Ryu (ICAIIC, 2024)

OCDM System Design by iDFT Transform and 2 Phase Controllers for 6G Wireless Waveform. - Heung-Gyoon Ryu (MOCAST, 2024)

ESPAR array design for the wireless communication and IoT applications. - Md. Moklesur Rahman; Heung-Gyoon Ryu (Telecommun. Syst., 2024)

Generalized Analog Least Mean Square Loop for Self-Interference Cancellation in In-Band Full-Duplex Communications. - Keda Xu; Anh Tuyen Le; Xiaojing Huang 001; Heung-Gyoon Ryu (IEEE Trans. Wirel. Commun., 2025)