Code Orthogonalizing Filter Based Adaptive Array Antenna Using Common Correlation Matrix of Time Domain Signals for Multicarrier DS/CDMA Systems. - Chang-Jun Ahn; Iwao Sasase (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

The effects of modulation combination, target BER, Doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel. - Chang-Jun Ahn; Iwao Sasase (IEEE Trans. Consumer Electron., 2002)

Pilot symbol assisted high speed packet transmission system based on adaptive OFDM in broadband mobile channel. - Chang-Jun Ahn; Iwao Sasase (J. Commun. Networks, 2003)

Reverse link performance improvement for an wideband OFDM using Alamouti coded heterogeneous polarization antennas. - Chang-Jun Ahn; K. Kamio; Satoshi Takahashi; Hiroshi Harada (ISCC, 2004)

Dynamic parameter controlled orthogonal frequency and time division multiple access. - Hiroshi Harada; Chang-Jun Ahn; Satoshi Takahashi; Yukiyoshi Kamio; Seiichi Sampei (PIMRC, 2004)

Adaptive subcarrier block modulation with differentially modulated pilot symbol assistance for downlink OFDM using uplink delay spread. - Chang-Jun Ahn; Satoshi Takahashi; Hiroshi Harada (PIMRC, 2005)

Differential Modulated Pilot Symbol Assisted Adaptive OFDM for Reducing the MLI with Predicted FBI. - Chang-Jun Ahn; Satoshi Takahashi; Hiroshi Harada (IEICE Trans. Commun., 2005)

Adaptive Subcarrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Downlink OFDM Using Uplink Delay Spread. - Chang-Jun Ahn; Satoshi Takahashi; Hiroshi Harada; Yukiyoshi Kamio; Iwao Sasase (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Effect of Delay Spread Enhancement in MIMO Eigenbeam Space Division Multiplexing Transmission. - Satoshi Takahashi; Chang-Jun Ahn; Hiroshi Harada; Yukiyoshi Kamio (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

Superimposed Frequency Symbol Based Adaptive Downlink OFDM with Frequency Spreading and Equalization. - Chang-Jun Ahn; Hiroshi Harada; Yukiyoshi Kamio (IEICE Trans. Commun., 2006)

Subcarrier Block Power Control for Adaptive Downlink OFDM with Frequency Spreading and Equalization. - Nam-Su Kim; Sungho Cho; Chang-Jun Ahn (IEICE Trans. Commun., 2006)

Stochastic Method of Determining Substream Modulation Levels for MIMO Eigenbeam Space Division Multiplexing. - Satoshi Takahashi; Chang-Jun Ahn; Hiroshi Harada (IEICE Trans. Commun., 2006)

Unitary matrix modulation with splitting over the coherence bandwidth for OFDM in a single antenna system. - Chang-Jun Ahn (Wirel. Commun. Mob. Comput., 2006)

Fuzzy ARTMAP with Explicit and Implicit Weights. - Takeshi Kamio; Kenji Mori; Kunihiko Mitsubori; Chang-Jun Ahn; Hisato Fujisaka; Kazuhisa Haeiwa (ICONIP (1), 2007)

Link Correlation based Transmit Sector Antenna Selection for Alamouti Coded OFDM. - Chang-Jun Ahn; Satoshi Takahashi; M. Taromaru (WCNC, 2007)

Accurate Channel Identification with Time-Frequency Interferometry for OFDM. - Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

High Time Resolution Carrier Interferometry for MIMO/OFDM. - Chang-Jun Ahn (CCNC, 2008)

Throughput Improvement with Discrete Pilot Signal Assignment and Iterative Channel Identification for MQRD-PCM/OFDM. - Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Parallel Detection Algorithm Using Multiple QR Decompositions With Permuted Channel Matrix for SDM/OFDM. - Chang-Jun Ahn (IEEE Trans. Veh. Technol., 2008)

Channel Ranking Based Joint Symbols Detection for MQRD-PCM/MIMO-OFDM. - Chang-Jun Ahn (CCNC, 2009)

Ising spin-grass error correction for unreliable nanoelectronic logic circuits. - Yasuhiro Okada; Hisato Fujisaka; Takeshi Kamio; Chang-Jun Ahn; Kazuhisa Haeiwa (ECCTD, 2009)

A single-eletron bandpass digital wave filter. - Takashi Yasuno; Yoshinao Suzuki; Hisato Fujisaka; Takeshi Kamio; Chang-Jun Ahn; Kazuhisa Haeiwa (ECCTD, 2009)

Performance enhancement of TFI-OFDM with path selection based channel identification. - Takeshi Yoshimura; Chang-Jun Ahn; Takeshi Kamio; Hisato Fujisaka; Kazuhisa Haeiwa (Digit. Signal Process., 2009)

Link Correlation Based Transmit Sector Antenna Selection for Alamouti Coded OFDM. - Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Performance Enhancement of MQRD-PCM/MIMO-OFDM Using Channel Ranking Based Joint Symbols Detection. - Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2009)

Achievable throughput enhancement based on modified carrier interferometry for MIMO/OFDM. - Chang-Jun Ahn (Digit. Signal Process., 2010)

HTRCI and Channel Ranking Based Joint Symbols Detection for MQRD-PCM/MIMO-OFDM. - Chang-Jun Ahn (Wirel. Pers. Commun., 2010)

Efficient phase sequence generation for SLM scheme without side information. - Hyunju Kim; Eonpyo Hong; Chang-Jun Ahn; Dongsoo Har (IEICE Electron. Express, 2011)

A Pilot Symbol Pattern Enabling Data Recovery Without Side Information in PTS-Based OFDM Systems. - Hyunju Kim; Eonpyo Hong; Chang-Jun Ahn; Dong-Soo Har (IEEE Trans. Broadcast., 2011)

Heterogeneous constellation based QOSTBC for improving property of QRD-MLD. - Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ICCE, 2012)

Frequency symbol spreading based adaptive subcarrier block selection for OFDMA system. - Chang-Jun Ahn; Dongsoo Har; Tatsuya Omori; Ken-ya Hashimoto (Digit. Signal Process., 2012)

Heterogeneous Constellation Based QOSTBC for Improving Detection Property of QRD-MLD. - Chang-Jun Ahn; Ken-ya Hashimoto (IEICE Trans. Commun., 2012)

Interference Cancellation Using Replica Signal for HTRCI-MIMO/OFDM in Time-Variant Large Delay Spread Longer Than Guard Interval. - Yuta Ida; Chang-Jun Ahn; Takeshi Kamio; Hisato Fujisaka; Kazuhisa Haeiwa (J. Electr. Comput. Eng., 2012)

Sorter-Based Arithmetic Circuits for Sigma-Delta Domain Signal Processing - Part I: Addition, Approximate Transcendental Functions, and Log-Domain Operations. - Hisato Fujisaka; Takeshi Kamio; Chang-Jun Ahn; Masahiro Sakamoto; Kazuhisa Haeiwa (IEEE Trans. Circuits Syst. I Regul. Pap., 2012)

Sorter-Based Arithmetic Circuits for Sigma-Delta Domain Signal Processing - Part II: Multiplication and Algebraic Functions. - Hisato Fujisaka; Masahiro Sakamoto; Chang-Jun Ahn; Takeshi Kamio; Kazuhisa Haeiwa (IEEE Trans. Circuits Syst. I Regul. Pap., 2012)

Mitigated deep faded channel with relay node allocation for MUDiv/OFDMA. - Yuta Ida; Chang-Jun Ahn; Takahiro Matsumoto; Shinya Matsufuji (APCC, 2013)

Throughput performance enhancement applying adaptive modulation for single symbol decodable QO-STBC with full diversity. - Masayuki Kitakatay; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (APCC, 2013)

Enhancement of cell-edge throughput performance with CoMP transmission using QO-STBC scheme. - Kei Okubo; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (GCCE, 2013)

Single symbol decodable QO-STBC with full diversity. - Naotoshi Yoda; Wenjian Wang; Chang-Jun Ahn (ICSPCS, 2013)

Non-linear fast fading compensation for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking. - Yuta Ida; Masanori Yofune; Chang-Jun Ahn; Takahiro Matsumoto; Shinya Matsufuji (IWSDA, 2013)

Power priority selection and adaptive clipping with peak reduction signal for MUDiv/OFDMA. - Akihiro Kuroha; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (RIVF, 2013)

Interference compensation scheme using time domain replica signals for SP-MIMO/OFDM under large delay spread channel greater than GI. - Taichi Sakaue; Tomoki Yoshimura; Yuta Ida; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (RIVF, 2013)

Variable packet splitting transmission in multi-relay cooperative communications with DF and DAF for SC-FDMA. - Yuta Ida; Chang-Jun Ahn; Takeshi Kamio; Hisato Fujisaka; Kazuhisa Haeiwa (EURASIP J. Wirel. Commun. Netw., 2013)

IQ imbalance and carrier frequency offset compensation schemes for TFI-OFDM. - Hikaru Oka; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2014)

Removing Deep Faded Subcarrier Channel for Cooperative Multiuser Diversity OFDMA Based on Low Granularity Block. - Yuta Ida; Chang-Jun Ahn; Takahiro Matsumoto; Shinya Matsufuji (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Single Symbol Decodable QO-STBC with Full Diversity. - Naotoshi Yoda; Chang-Jun Ahn; Ken-ya Hashimoto (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2014)

Maritime VHF communications with polarization diversity over a Rician channel. - Chang-Jun Ahn; Incheol Jeong; Izumi Endo; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Commun. Syst., 2014)

Multiuser Diversity OFDMA using Power Priority Selection and Adaptive Clipping. - Akihiro Kuroha; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Distributed Syst. Technol., 2014)

Time Domain Replica Signal Based Interference Compensation for SP-MIMO/OFDM with Large Delay Spread Channel. - Taichi Sakaue; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Int. J. Distributed Syst. Technol., 2014)

A novel time synchronization scheme for OFDM systems based on variational Pseudo-noise preamble. - Wenjian Wang; Ye Tian; Chang-Jun Ahn (APSITT, 2015)

Spatial performance of color clustered VLC-MIMO due to incompleteness of color filters. - Kotaro Abe; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

An application of OFDM-IDMA to uplink multiuser visible light communication system. - Asato Kuriharat; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

Channel compensation based on VPS and time-frequency interferometry for massive MIMO-OFDM. - Masaya Okamura; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

The accuracy improvement using WLAN for indoor positioning system. - Ye Tian; Wenjian Wang; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ISPACS, 2015)

Estimation based on weighted channel variance for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking under fast fading Channel. - Yuta Ida; Masanori Yofune; Chang-Jun Ahn; Takahiro Matsumoto; Shinya Matsufuji (Trans. Emerg. Telecommun. Technol., 2015)

IQ imbalance estimation and compensation schemes based on time-frequency interferometry for OFDM. - Hikaru Oka; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (Trans. Emerg. Telecommun. Technol., 2015)

Achievement Accurate CSI for AF Relay MIMO/OFDM Based on Complex HTRCI Pilot Signal with Enhanced MMSE Equalization. - Yuta Ida; Chang-Jun Ahn; Takahiro Matsumoto; Shinya Matsufuji (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

A Sigma-Delta Domain Lowpass Wave Filter. - Hisato Fujisaka; Takeshi Kamio; Chang-Jun Ahn; Masahiro Sakamoto; Kazuhisa Haeiwa (IEEE Trans. Circuits Syst. I Regul. Pap., 2015)

Color cell based bidirectional VLC with user mobility. - Atul Sewaiwar; Samrat Vikramaditya Tiwari; Yeon-ho Chung; Chang-Jun Ahn (ICC Workshops, 2016)

Performance enhancement with applying FSS and ASB method for MU-MIMO. - Fumiaki Ukaji; Chang-Jun Ahn; Tatsuya Omori; Ken-ya Hashimoto (ICIT, 2016)

An applicable 5.8 GHz wireless power transmission system with rough beamforming to Project Loon. - Chang-Jun Ahn (ICT Express, 2016)

Improved common correlation matrix based SMI algorithm by channel estimation error minimization with LMS approach. - Takashi Akao; Satoshi Taroda; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2017)

Improving scattered pilot channel estimation by sector selection on FDD MIMO/OFDM systems. - Masato Katsuno; Shoichi Higuchi; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2017)

Optimized adaptive modulation with considering mobile relay on FSS-OFDM system. - Shun Kojima; Ken Teduka; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2017)

A weighted least-squares method using received signal strength measurements for WLAN indoor positioning system. - Ye Tian; Daito Shigaki; Wenjian Wang; Chang-Jun Ahn (WPMC, 2017)

Performance of polar codes with MIMO-OFDM under frequency selective fading channel. - Koya Watanabe; Shoichi Higuchi; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2017)

Blind symbol timing synchronization scheme for real-time industrial wireless control network using high-speed preambleless OFDM systems over multipath fading channels. - Wenjian Wang; Ye Tian; Chang-Jun Ahn (Digit. Signal Process., 2017)

Reduced complexity and latency for a massive MIMO system using a parallel detection algorithm. - Shoichi Higuchi; Chang-Jun Ahn (ICT Express, 2017)

Modified Pilot Selection for Systematic Polar Coded MIMO-OFDM Channel Estimation. - Koya Watanabe; Shun Kojima; Takashi Akao; Masato Katsuno; Kazuki Maruta; Chang-Jun Ahn (ISPACS, 2018)

V2P Connectivity on Higher Frequency Band and CoMP Based Coverage Expansion. - Kazuki Maruta; Yu Nakayama; Kazuaki Honda; Daisuke Hisano; Chang-Jun Ahn (PIMRC, 2018)

Adaptive Switching Method with AMC and FSS. - Shun Kojima; Takashi Akao; Koya Watanabe; Masato Katsuno; Kazuki Maruta; Chang-Jun Ahn (SoftCOM, 2018)

Uplink Interference Suppression by Semi-Blind Adaptive Array With Decision Feedback Channel Estimation on Multicell Massive MIMO Systems. - Kazuki Maruta; Chang-Jun Ahn (IEEE Trans. Commun., 2018)

Outage Probability Analysis of MF Precoded Massive MIMO with Multi-antenna User Environment. - Koki Ito; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Modified HTRCI with Time-domain CSI Separation for Pilot De-contamination. - Kakeru Matsubara; Shun Kuroki; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Fast Fading Compensation by Frame Splitting and Decision Directed Channel Extrapolation for OFDM. - Kouichi Motosugi; Kentaro Yonei; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Data-aided SMI Algorithm using Common Correlation Matrix for Adaptive Array Interference Suppression. - Kosuke Shima; Katsuya Senoo; Kenta Goto; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Channel Ranking based Spread Code Optimization for Visible Light Communication OFDM-IDMA Systems. - Kazushi Shimada; Mitsuki Takahashi; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Known Bits Puncturing for Systematic Polar Codes. - Naoya Tanuma; Ryo Marumo; Kazuki Maruta; Chang-Jun Ahn (APCC, 2019)

Enhanced Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems for Multi Modulus Signals. - Kazuki Maruta; Chang-Jun Ahn (VTC Fall, 2019)

Adaptive Modulation and Coding Using Neural Network Based SNR Estimation. - Shun Kojima; Kazuki Maruta; Chang-Jun Ahn (IEEE Access, 2019)

Reducing channel spatial correlation by rotating planar antenna array. - Takashi Akao; Koya Watanabe; Shun Kojima; Masato Katsuno; Kazuki Maruta; Chang-Jun Ahn (ICT Express, 2019)

Transmit power imbalance reduction method and nonlinear companding transform for beamforming OFDM systems. - Satoshi Taroda; Ken Tezuka; Shoichi Higuchi; Chang-Jun Ahn; Kazuki Maruta (ICT Express, 2019)

Modified pilot selection for channel estimation of systematic polar coded MIMO-OFDM. - Koya Watanabe; Shun Kojima; Takashi Akao; Masato Katsuno; Kazuki Maruta; Chang-Jun Ahn (ICT Express, 2019)

Improving Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems: A Beamspace Approach. - Kazuki Maruta; Chang-Jun Ahn (IEICE Trans. Commun., 2019)

High-precision SNR Estimation by CNN using PSD Image for Adaptive Modulation and Coding. - Shun Kojima; Kazuki Maruta; Chang-Jun Ahn (VTC Spring, 2020)

Blind SIR Estimation by Convolutional Neural Network Using Visualized IQ Constellation. - Kazuki Maruta; Shun Kojima; Chang-Jun Ahn; Daisuke Hisano; Yu Nakayama (VTC Spring, 2020)

High Beamforming Gain Precoding Weight Design Scheme with Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels. - Kabuto Arai; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2020)

Improved Null-Space Expansion Scheme under Presence of Channel Estimation Error for Multiuser Massive MIMO. - Nobutaka Funaki; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2020)

Improving DOA Estimation Accuracy by Rotating Planar Array Antenna. - Toshiya Hanada; Chang-Jun Ahn; Kazuki Maruta (WPMC, 2020)

Reducing FBI and MLI Using FSS Method for Adaptive Modulated VLC-OFDM System. - Seiya Hirano; Kazushi Shimada; Shun Kojima; Kazuki Maruta; Chang-Jun Ahn (WPMC, 2020)

Computationally Efficient SLM based PAPR Reduction for STPA-BAA Scheme. - Hiroaki Kobayashi; Kazuki Maruta; Takatoshi Sugiyama; Chang-Jun Ahn (WPMC, 2020)

Uplink Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels Under Unknown Interference. - Kabuto Arai; Kazuki Maruta; Chang-Jun Ahn (IEEE Access, 2020)

Frame splitting and data-aided decision direct channel estimation for OFDM in fast varying fading channels. - Kentaro Yonei; Kazuki Maruta; Chang-Jun Ahn (ICT Express, 2020)

Joint Polar Code and Trellis Coded Modulation with Known Bits Puncturing. - Taiga Mano; Chang-Jun Ahn (ISPACS, 2021)

Performance Enhancement of Low Granularity MIMO-OFDMA Using FSS Method. - Yuta Toyama; Shun Kojima; Chang-Jun Ahn (ISPACS, 2021)

Optimum Assignment of Variable Code Length and Modulation Index for VLC-OFDM. - Koki Yanashita; Kazushi Shimada; Seiya Hirano; Chang-Jun Ahn (ISPACS, 2021)

Variable Frame Splitting for Polar Coded MIMO E-SDM in Fast Fading Channel. - He He; Shun Kojima; Kentaro Yonei; Kazuki Maruta; Chang-Jun Ahn (VTC Fall, 2021)

Investigation of Input Signal Representation to CNN for Improving SNR Classification Accuracy. - Shun Kojima; Yi Feng; Kazuki Maruta; Kanemitsu Ootsu; Takashi Yokota; Chang-Jun Ahn; Vahid Tarokh (VTC Fall, 2021)

Generalized Regression Neural Network Based Fast Fading Channel Tracking Using Frequency-Domain CSI Smoothing. - Shun Kojima; He He; Takaki Omura; Kazuki Maruta; Chang-Jun Ahn (IEEE Access, 2021)

Adaptive Subcarrier Grouping for MMSE-SMI Adaptive Array Interference Suppression. - Kosuke Shima; Shun Kojima; Koki Ito; Kazuki Maruta; Chang-Jun Ahn (IEEE Access, 2021)

Dimensionality reduction of interference subspace for multiuser massive MIMO null-space expansion. - Nobutaka Funaki; Kazuki Maruta; Chang-Jun Ahn (Digit. Signal Process., 2021)

Pilot De-Contamination by Modified HTRCI with Time-Domain CSI Separation for Two-Cell MIMO Downlink. - Kakeru Matsubara; Shun Kuroki; Koki Ito; Kazushi Shimada; Kazuki Maruta; Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Data-Aided SMI Algorithm Using Common Correlation Matrix for Adaptive Array Interference Suppression. - Kosuke Shima; Kazuki Maruta; Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Multi Modulus Signal Adaptation for Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems. - Kazuki Maruta; Chang-Jun Ahn (IEICE Trans. Commun., 2021)

CNN-Based Joint SNR and Doppler Shift Classification Using Spectrogram Images for Adaptive Modulation and Coding. - Shun Kojima; Kazuki Maruta; Yi Feng; Chang-Jun Ahn; Vahid Tarokh (IEEE Trans. Commun., 2021)

Game Theoretic Framework for Beamforming Optimization for Photon-Counting Multiuser MISO Channel with Asymptotic Low Power. - Sudhanshu Arya; Yeon Ho Chung; Chang-Jun Ahn (ICC Workshops, 2022)

Towards Deep Learning-Guided Multiuser SNR and Doppler Shift Detection for Next-Generation Wireless Systems. - Shun Kojima; Yi Feng; Kazuki Maruta; Kanemitsu Ootsu; Takashi Yokota; Chang-Jun Ahn; Vahid Tarokh (VTC Spring, 2022)

CNN-based blind SIR classification framework for STPA-BAA spectrum superposing. - Hiroaki Kobayashi; Shun Kojima; Kazuki Maruta; Takatoshi Sugiyama; Chang-Jun Ahn (ICT Express, 2023)

Adaptive Zero-Padding with Impulsive Training Signal MMSE-SMI Adaptive Array Interference Suppression. - He He; Shun Kojima; Kazuki Maruta; Chang-Jun Ahn (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2023)

Timing Synchronization Based on Supervised Learning of Spectrogram for OFDM Systems. - Shun Kojima; Yuta Goto; Kazuki Maruta; Shinya Sugiura; Chang-Jun Ahn (IEEE Trans. Cogn. Commun. Netw., 2023)

Maximum Doppler Shift Identification using Decision Feedback Channel Estimation. - Yudai Handa; Kosuke Tamura; Hiroya Hayakawa; Riku Tanaka; Jaesang Cha; Chang-Jun Ahn (APCC, 2024)

Hybrid Beamforming Structure Using Grouping with Reduced Number of Phase Shifters in Multi-User MISO. - Hiroya Hayakawa; Yudai Handa; Riku Tanaka; Kosuke Tamura; Jaesang Cha; Chang-Jun Ahn (APCC, 2024)

Performance Enhancement of ATSC3.0 Using Polarization Property and Frequency Symbol Spreading. - Riku Tanaka; Yudai Handa; Hiroya Hayakawa; Jaesang Cha; Chang-Jun Ahn (APCC, 2024)

Optimization of Vehicular Network Resource Allocation Based on MAAC Algorithm. - Jun-Han Wang; He He; Kosuke Tamura; Shun Kojima; Jaesang Cha; Chang-Jun Ahn (APCC, 2024)

Efficient Joint Estimation Methods of Channel and IQ Imbalance for MIMO-OFDM Systems. - Koji Nishibe; Takanori Shibakura; Koki Miyamoto; Jaesang Cha; Chang-Jun Ahn (ICEIC, 2024)

Accurate and Doppler Robust SNR Estimation using Multimodal CNN. - Kosuke Tamura; Shun Kojima; Shinya Sugiura; Jaesang Cha; Chang-Jun Ahn (VTC Spring, 2024)

Vehicle-to-Vehicle Communication Channel Estimator Based on Gate Recurrent Unit. - Jun-Han Wang; He He; Kosuke Tamura; Shun Kojima; Jaesang Cha; Chang-Jun Ahn (IEEE Access, 2025)