Chang-Jun Ahn

122 papers B 4C 14Misc 1Journal 58Unranked 45
YearRankTypeTitle / Venue / Authors
2026 J jnl
VAE-GAN-Based Semantic Communication for High-Quality Image Transmission.
IEEE Trans. Wirel. Commun.
Naoki Omi, Shun Kojima, Chang-Jun Ahn
2025 J jnl
Vehicle-to-Vehicle Communication Channel Estimator Based on Gate Recurrent Unit.
IEEE Access
Jun-Han Wang, He He, Kosuke Tamura, Shun Kojima, Jaesang Cha, Chang-Jun Ahn
2024 — conf
Accurate and Doppler Robust SNR Estimation using Multimodal CNN.
VTC Spring
Kosuke Tamura, Shun Kojima, Shinya Sugiura, Jaesang Cha, Chang-Jun Ahn
2024 — conf
Efficient Joint Estimation Methods of Channel and IQ Imbalance for MIMO-OFDM Systems.
ICEIC
Koji Nishibe, Takanori Shibakura, Koki Miyamoto, Jaesang Cha, Chang-Jun Ahn
2024 C conf
Hybrid Beamforming Structure Using Grouping with Reduced Number of Phase Shifters in Multi-User MISO.
APCC
Hiroya Hayakawa, Yudai Handa, Riku Tanaka, Kosuke Tamura, Jaesang Cha, Chang-Jun Ahn
2024 C conf
Maximum Doppler Shift Identification using Decision Feedback Channel Estimation.
APCC
Yudai Handa, Kosuke Tamura, Hiroya Hayakawa, Riku Tanaka, Jaesang Cha, Chang-Jun Ahn
2024 C conf
Optimization of Vehicular Network Resource Allocation Based on MAAC Algorithm.
APCC
Jun-Han Wang, He He, Kosuke Tamura, Shun Kojima, Jaesang Cha, Chang-Jun Ahn
2024 C conf
Performance Enhancement of ATSC3.0 Using Polarization Property and Frequency Symbol Spreading.
APCC
Riku Tanaka, Yudai Handa, Hiroya Hayakawa, Jaesang Cha, Chang-Jun Ahn
2024 — conf
Vehicle-to-Vehicle Communication Channel Estimator Based on Gate Recurrent Unit.
ICEIC
Jun-Han Wang, He He, Kosuke Tamura, Shun Kojima, Jaesang Cha, Chang-Jun Ahn
2023 J jnl
Adaptive Zero-Padding with Impulsive Training Signal MMSE-SMI Adaptive Array Interference Suppression.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
He He, Shun Kojima, Kazuki Maruta, Chang-Jun Ahn
2023 J jnl
CNN-based blind SIR classification framework for STPA-BAA spectrum superposing.
ICT Express
Hiroaki Kobayashi, Shun Kojima, Kazuki Maruta, Takatoshi Sugiyama, Chang-Jun Ahn
2023 J jnl
Timing Synchronization Based on Supervised Learning of Spectrogram for OFDM Systems.
IEEE Trans. Cogn. Commun. Netw.
Shun Kojima, Yuta Goto, Kazuki Maruta, Shinya Sugiura, Chang-Jun Ahn
2022 — conf
Game Theoretic Framework for Beamforming Optimization for Photon-Counting Multiuser MISO Channel with Asymptotic Low Power.
ICC Workshops
Sudhanshu Arya, Yeon Ho Chung, Chang-Jun Ahn
2022 — conf
Towards Deep Learning-Guided Multiuser SNR and Doppler Shift Detection for Next-Generation Wireless Systems.
VTC Spring
Shun Kojima, Yi Feng, Kazuki Maruta, Kanemitsu Ootsu, Takashi Yokota, Chang-Jun Ahn, Vahid Tarokh
2021 J jnl
Adaptive Subcarrier Grouping for MMSE-SMI Adaptive Array Interference Suppression.
IEEE Access
Kosuke Shima, Shun Kojima, Koki Ito, Kazuki Maruta, Chang-Jun Ahn
2021 J jnl
CNN-Based Joint SNR and Doppler Shift Classification Using Spectrogram Images for Adaptive Modulation and Coding.
IEEE Trans. Commun.
Shun Kojima, Kazuki Maruta, Yi Feng, Chang-Jun Ahn, Vahid Tarokh
2021 J jnl
Data-Aided SMI Algorithm Using Common Correlation Matrix for Adaptive Array Interference Suppression.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kosuke Shima, Kazuki Maruta, Chang-Jun Ahn
2021 J jnl
Dimensionality reduction of interference subspace for multiuser massive MIMO null-space expansion.
Digit. Signal Process.
Nobutaka Funaki, Kazuki Maruta, Chang-Jun Ahn
2021 J jnl
Generalized Regression Neural Network Based Fast Fading Channel Tracking Using Frequency-Domain CSI Smoothing.
IEEE Access
Shun Kojima, He He, Takaki Omura, Kazuki Maruta, Chang-Jun Ahn
2021 — conf
Investigation of Input Signal Representation to CNN for Improving SNR Classification Accuracy.
VTC Fall
Shun Kojima, Yi Feng, Kazuki Maruta, Kanemitsu Ootsu, Takashi Yokota, Chang-Jun Ahn, Vahid Tarokh
2021 — conf
Joint Polar Code and Trellis Coded Modulation with Known Bits Puncturing.
ISPACS
Taiga Mano, Chang-Jun Ahn
2021 J jnl
Multi Modulus Signal Adaptation for Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems.
IEICE Trans. Commun.
Kazuki Maruta, Chang-Jun Ahn
2021 — conf
Optimum Assignment of Variable Code Length and Modulation Index for VLC-OFDM.
ISPACS
Koki Yanashita, Kazushi Shimada, Seiya Hirano, Chang-Jun Ahn
2021 — conf
Performance Enhancement of Low Granularity MIMO-OFDMA Using FSS Method.
ISPACS
Yuta Toyama, Shun Kojima, Chang-Jun Ahn
2021 J jnl
Pilot De-Contamination by Modified HTRCI with Time-Domain CSI Separation for Two-Cell MIMO Downlink.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Kakeru Matsubara, Shun Kuroki, Koki Ito, Kazushi Shimada, Kazuki Maruta, Chang-Jun Ahn
2021 — conf
Variable Frame Splitting for Polar Coded MIMO E-SDM in Fast Fading Channel.
VTC Fall
He He, Shun Kojima, Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn
2020 — conf
Blind SIR Estimation by Convolutional Neural Network Using Visualized IQ Constellation.
VTC Spring
Kazuki Maruta, Shun Kojima, Chang-Jun Ahn, Daisuke Hisano, Yu Nakayama
2020 — conf
Computationally Efficient SLM based PAPR Reduction for STPA-BAA Scheme.
WPMC
Hiroaki Kobayashi, Kazuki Maruta, Takatoshi Sugiyama, Chang-Jun Ahn
2020 J jnl
Frame splitting and data-aided decision direct channel estimation for OFDM in fast varying fading channels.
ICT Express
Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn
2020 — conf
High Beamforming Gain Precoding Weight Design Scheme with Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels.
WPMC
Kabuto Arai, Kazuki Maruta, Chang-Jun Ahn
2020 — conf
High-precision SNR Estimation by CNN using PSD Image for Adaptive Modulation and Coding.
VTC Spring
Shun Kojima, Kazuki Maruta, Chang-Jun Ahn
2020 — conf
Improved Null-Space Expansion Scheme under Presence of Channel Estimation Error for Multiuser Massive MIMO.
WPMC
Nobutaka Funaki, Kazuki Maruta, Chang-Jun Ahn
2020 — conf
Improving DOA Estimation Accuracy by Rotating Planar Array Antenna.
WPMC
Toshiya Hanada, Chang-Jun Ahn, Kazuki Maruta
2020 — conf
Reducing FBI and MLI Using FSS Method for Adaptive Modulated VLC-OFDM System.
WPMC
Seiya Hirano, Kazushi Shimada, Shun Kojima, Kazuki Maruta, Chang-Jun Ahn
2020 J jnl
Uplink Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels Under Unknown Interference.
IEEE Access
Kabuto Arai, Kazuki Maruta, Chang-Jun Ahn
2019 J jnl
Adaptive Modulation and Coding Using Neural Network Based SNR Estimation.
IEEE Access
Shun Kojima, Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Channel Ranking based Spread Code Optimization for Visible Light Communication OFDM-IDMA Systems.
APCC
Kazushi Shimada, Mitsuki Takahashi, Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Data-aided SMI Algorithm using Common Correlation Matrix for Adaptive Array Interference Suppression.
APCC
Kosuke Shima, Katsuya Senoo, Kenta Goto, Kazuki Maruta, Chang-Jun Ahn
2019 — conf
Enhanced Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems for Multi Modulus Signals.
VTC Fall
Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Fast Fading Compensation by Frame Splitting and Decision Directed Channel Extrapolation for OFDM.
APCC
Kouichi Motosugi, Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn
2019 J jnl
Improving Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems: A Beamspace Approach.
IEICE Trans. Commun.
Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Known Bits Puncturing for Systematic Polar Codes.
APCC
Naoya Tanuma, Ryo Marumo, Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Modified HTRCI with Time-domain CSI Separation for Pilot De-contamination.
APCC
Kakeru Matsubara, Shun Kuroki, Kazuki Maruta, Chang-Jun Ahn
2019 J jnl
Modified pilot selection for channel estimation of systematic polar coded MIMO-OFDM.
ICT Express
Koya Watanabe, Shun Kojima, Takashi Akao, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn
2019 C conf
Outage Probability Analysis of MF Precoded Massive MIMO with Multi-antenna User Environment.
APCC
Koki Ito, Kazuki Maruta, Chang-Jun Ahn
2019 J jnl
Reducing channel spatial correlation by rotating planar antenna array.
ICT Express
Takashi Akao, Koya Watanabe, Shun Kojima, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn
2019 J jnl
Transmit power imbalance reduction method and nonlinear companding transform for beamforming OFDM systems.
ICT Express
Satoshi Taroda, Ken Tezuka, Shoichi Higuchi, Chang-Jun Ahn, Kazuki Maruta
2018 Misc conf
Adaptive Switching Method with AMC and FSS.
SoftCOM
Shun Kojima, Takashi Akao, Koya Watanabe, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn
2018 — conf
Modified Pilot Selection for Systematic Polar Coded MIMO-OFDM Channel Estimation.
ISPACS
Koya Watanabe, Shun Kojima, Takashi Akao, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn
2018 — conf
Reducing Channel Spatial Correlation by Rotating Planar Antenna Array.
ISPACS
Takashi Akao, Koya Watanabe, Shun Kojima, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn
2018 J jnl
Uplink Interference Suppression by Semi-Blind Adaptive Array With Decision Feedback Channel Estimation on Multicell Massive MIMO Systems.
IEEE Trans. Commun.
Kazuki Maruta, Chang-Jun Ahn
2018 B conf
V2P Connectivity on Higher Frequency Band and CoMP Based Coverage Expansion.
PIMRC
Kazuki Maruta, Yu Nakayama, Kazuaki Honda, Daisuke Hisano, Chang-Jun Ahn
2017 — conf
A weighted least-squares method using received signal strength measurements for WLAN indoor positioning system.
WPMC
Ye Tian, Daito Shigaki, Wenjian Wang, Chang-Jun Ahn
2017 J jnl
Blind symbol timing synchronization scheme for real-time industrial wireless control network using high-speed preambleless OFDM systems over multipath fading channels.
Digit. Signal Process.
Wenjian Wang, Ye Tian, Chang-Jun Ahn
2017 — conf
Improved common correlation matrix based SMI algorithm by channel estimation error minimization with LMS approach.
WPMC
Takashi Akao, Satoshi Taroda, Kazuki Maruta, Chang-Jun Ahn
2017 — conf
Improving scattered pilot channel estimation by sector selection on FDD MIMO/OFDM systems.
WPMC
Masato Katsuno, Shoichi Higuchi, Kazuki Maruta, Chang-Jun Ahn
2017 — conf
Optimized adaptive modulation with considering mobile relay on FSS-OFDM system.
WPMC
Shun Kojima, Ken Teduka, Kazuki Maruta, Chang-Jun Ahn
2017 — conf
Performance of polar codes with MIMO-OFDM under frequency selective fading channel.
WPMC
Koya Watanabe, Shoichi Higuchi, Kazuki Maruta, Chang-Jun Ahn
2017 J jnl
Reduced complexity and latency for a massive MIMO system using a parallel detection algorithm.
ICT Express
Shoichi Higuchi, Chang-Jun Ahn
2016 J jnl
An applicable 5.8 GHz wireless power transmission system with rough beamforming to Project Loon.
ICT Express
Chang-Jun Ahn
2016 — conf
Color cell based bidirectional VLC with user mobility.
ICC Workshops
Atul Sewaiwar, Samrat Vikramaditya Tiwari, Yeon-ho Chung, Chang-Jun Ahn
2016 — conf
Performance enhancement with applying FSS and ASB method for MU-MIMO.
ICIT
Fumiaki Ukaji, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2015 J jnl
A Sigma-Delta Domain Lowpass Wave Filter.
IEEE Trans. Circuits Syst. I Regul. Pap.
Hisato Fujisaka, Takeshi Kamio, Chang-Jun Ahn, Masahiro Sakamoto, Kazuhisa Haeiwa
2015 — conf
A novel time synchronization scheme for OFDM systems based on variational Pseudo-noise preamble.
APSITT
Wenjian Wang, Ye Tian, Chang-Jun Ahn
2015 J jnl
Achievement Accurate CSI for AF Relay MIMO/OFDM Based on Complex HTRCI Pilot Signal with Enhanced MMSE Equalization.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji
2015 — conf
An application of OFDM-IDMA to uplink multiuser visible light communication system.
ISPACS
Asato Kuriharat, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2015 — conf
Channel compensation based on VPS and time-frequency interferometry for massive MIMO-OFDM.
ISPACS
Masaya Okamura, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2015 J jnl
Estimation based on weighted channel variance for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking under fast fading Channel.
Trans. Emerg. Telecommun. Technol.
Yuta Ida, Masanori Yofune, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji
2015 J jnl
IQ imbalance estimation and compensation schemes based on time-frequency interferometry for OFDM.
Trans. Emerg. Telecommun. Technol.
Hikaru Oka, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2015 — conf
Spatial performance of color clustered VLC-MIMO due to incompleteness of color filters.
ISPACS
Kotaro Abe, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2015 — conf
The accuracy improvement using WLAN for indoor positioning system.
ISPACS
Ye Tian, Wenjian Wang, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2014 — conf
IQ imbalance and carrier frequency offset compensation schemes for TFI-OFDM.
ISPACS
Hikaru Oka, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2014 J jnl
Maritime VHF communications with polarization diversity over a Rician channel.
Int. J. Commun. Syst.
Chang-Jun Ahn, Incheol Jeong, Izumi Endo, Tatsuya Omori, Ken-ya Hashimoto
2014 J jnl
Multiuser Diversity OFDMA using Power Priority Selection and Adaptive Clipping.
Int. J. Distributed Syst. Technol.
Akihiro Kuroha, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2014 J jnl
Removing Deep Faded Subcarrier Channel for Cooperative Multiuser Diversity OFDMA Based on Low Granularity Block.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji
2014 J jnl
Single Symbol Decodable QO-STBC with Full Diversity.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Naotoshi Yoda, Chang-Jun Ahn, Ken-ya Hashimoto
2014 J jnl
Time Domain Replica Signal Based Interference Compensation for SP-MIMO/OFDM with Large Delay Spread Channel.
Int. J. Distributed Syst. Technol.
Taichi Sakaue, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 — conf
Enhancement of cell-edge throughput performance with CoMP transmission using QO-STBC scheme.
GCCE
Kei Okubo, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 — conf
IQ imbalance estimation and compensation schemes based on time frequency interferometry for OFDM.
IWSDA
Hikaru Oka, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 — conf
Interference compensation scheme using time domain replica signals for SP-MIMO/OFDM under large delay spread channel greater than GI.
RIVF
Taichi Sakaue, Tomoki Yoshimura, Yuta Ida, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 C conf
Mitigated deep faded channel with relay node allocation for MUDiv/OFDMA.
APCC
Yuta Ida, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji
2013 — conf
Non-linear fast fading compensation for HTRCI-MIMO/OFDM with QRM-MLD and channel ranking.
IWSDA
Yuta Ida, Masanori Yofune, Chang-Jun Ahn, Takahiro Matsumoto, Shinya Matsufuji
2013 — conf
Power priority selection and adaptive clipping with peak reduction signal for MUDiv/OFDMA.
RIVF
Akihiro Kuroha, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 — conf
Single symbol decodable QO-STBC with full diversity.
ICSPCS
Naotoshi Yoda, Wenjian Wang, Chang-Jun Ahn
2013 C conf
Throughput performance enhancement applying adaptive modulation for single symbol decodable QO-STBC with full diversity.
APCC
Masayuki Kitakatay, Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2013 J jnl
Variable packet splitting transmission in multi-relay cooperative communications with DF and DAF for SC-FDMA.
EURASIP J. Wirel. Commun. Netw.
Yuta Ida, Chang-Jun Ahn, Takeshi Kamio, Hisato Fujisaka, Kazuhisa Haeiwa
2012 J jnl
Frequency symbol spreading based adaptive subcarrier block selection for OFDMA system.
Digit. Signal Process.
Chang-Jun Ahn, Dongsoo Har, Tatsuya Omori, Ken-ya Hashimoto
2012 J jnl
Heterogeneous Constellation Based QOSTBC for Improving Detection Property of QRD-MLD.
IEICE Trans. Commun.
Chang-Jun Ahn, Ken-ya Hashimoto
2012 C conf
Heterogeneous constellation based QOSTBC for improving property of QRD-MLD.
ICCE
Chang-Jun Ahn, Tatsuya Omori, Ken-ya Hashimoto
2012 J jnl
Interference Cancellation Using Replica Signal for HTRCI-MIMO/OFDM in Time-Variant Large Delay Spread Longer Than Guard Interval.
J. Electr. Comput. Eng.
Yuta Ida, Chang-Jun Ahn, Takeshi Kamio, Hisato Fujisaka, Kazuhisa Haeiwa
2012 J jnl
Sorter-Based Arithmetic Circuits for Sigma-Delta Domain Signal Processing - Part I: Addition, Approximate Transcendental Functions, and Log-Domain Operations.
IEEE Trans. Circuits Syst. I Regul. Pap.
Hisato Fujisaka, Takeshi Kamio, Chang-Jun Ahn, Masahiro Sakamoto, Kazuhisa Haeiwa
2012 J jnl
Sorter-Based Arithmetic Circuits for Sigma-Delta Domain Signal Processing - Part II: Multiplication and Algebraic Functions.
IEEE Trans. Circuits Syst. I Regul. Pap.
Hisato Fujisaka, Masahiro Sakamoto, Chang-Jun Ahn, Takeshi Kamio, Kazuhisa Haeiwa
2011 J jnl
A Pilot Symbol Pattern Enabling Data Recovery Without Side Information in PTS-Based OFDM Systems.
IEEE Trans. Broadcast.
Hyunju Kim, Eonpyo Hong, Chang-Jun Ahn, Dong-Soo Har
2011 J jnl
Efficient phase sequence generation for SLM scheme without side information.
IEICE Electron. Express
Hyunju Kim, Eonpyo Hong, Chang-Jun Ahn, Dongsoo Har
2010 J jnl
Achievable throughput enhancement based on modified carrier interferometry for MIMO/OFDM.
Digit. Signal Process.
Chang-Jun Ahn
2010 J jnl
HTRCI and Channel Ranking Based Joint Symbols Detection for MQRD-PCM/MIMO-OFDM.
Wirel. Pers. Commun.
Chang-Jun Ahn
2009 — conf
A single-eletron bandpass digital wave filter.
ECCTD
Takashi Yasuno, Yoshinao Suzuki, Hisato Fujisaka, Takeshi Kamio, Chang-Jun Ahn, Kazuhisa Haeiwa
2009 — conf
Channel Ranking Based Joint Symbols Detection for MQRD-PCM/MIMO-OFDM.
CCNC
Chang-Jun Ahn
2009 — conf
Ising spin-grass error correction for unreliable nanoelectronic logic circuits.
ECCTD
Yasuhiro Okada, Hisato Fujisaka, Takeshi Kamio, Chang-Jun Ahn, Kazuhisa Haeiwa
2009 J jnl
Link Correlation Based Transmit Sector Antenna Selection for Alamouti Coded OFDM.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn
2009 J jnl
Performance Enhancement of MQRD-PCM/MIMO-OFDM Using Channel Ranking Based Joint Symbols Detection.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn
2009 J jnl
Performance enhancement of TFI-OFDM with path selection based channel identification.
Digit. Signal Process.
Takeshi Yoshimura, Chang-Jun Ahn, Takeshi Kamio, Hisato Fujisaka, Kazuhisa Haeiwa
2008 — conf
High Time Resolution Carrier Interferometry for MIMO/OFDM.
CCNC
Chang-Jun Ahn
2008 J jnl
Parallel Detection Algorithm Using Multiple QR Decompositions With Permuted Channel Matrix for SDM/OFDM.
IEEE Trans. Veh. Technol.
Chang-Jun Ahn
2008 — conf
Parallel detection algorithm using multiple QR decompositions with permuted channel matrix for SDM/OFDM.
ISWPC
Chang-Jun Ahn
2008 J jnl
Throughput Improvement with Discrete Pilot Signal Assignment and Iterative Channel Identification for MQRD-PCM/OFDM.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn
2007 J jnl
Accurate Channel Identification with Time-Frequency Interferometry for OFDM.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn
2007 — conf
Fuzzy ARTMAP with Explicit and Implicit Weights.
ICONIP (1)
Takeshi Kamio, Kenji Mori, Kunihiko Mitsubori, Chang-Jun Ahn, Hisato Fujisaka, Kazuhisa Haeiwa
2007 B conf
Link Correlation based Transmit Sector Antenna Selection for Alamouti Coded OFDM.
WCNC
Chang-Jun Ahn, Satoshi Takahashi, M. Taromaru
2006 J jnl
Stochastic Method of Determining Substream Modulation Levels for MIMO Eigenbeam Space Division Multiplexing.
IEICE Trans. Commun.
Satoshi Takahashi, Chang-Jun Ahn, Hiroshi Harada
2006 J jnl
Subcarrier Block Power Control for Adaptive Downlink OFDM with Frequency Spreading and Equalization.
IEICE Trans. Commun.
Nam-Su Kim, Sungho Cho, Chang-Jun Ahn
2006 J jnl
Superimposed Frequency Symbol Based Adaptive Downlink OFDM with Frequency Spreading and Equalization.
IEICE Trans. Commun.
Chang-Jun Ahn, Hiroshi Harada, Yukiyoshi Kamio
2006 J jnl
Unitary matrix modulation with splitting over the coherence bandwidth for OFDM in a single antenna system.
Wirel. Commun. Mob. Comput.
Chang-Jun Ahn
2005 J jnl
Adaptive Subcarrier Block Modulation with Differentially Modulated Pilot Symbol Assistance for Downlink OFDM Using Uplink Delay Spread.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn, Satoshi Takahashi, Hiroshi Harada, Yukiyoshi Kamio, Iwao Sasase
2005 B conf
Adaptive subcarrier block modulation with differentially modulated pilot symbol assistance for downlink OFDM using uplink delay spread.
PIMRC
Chang-Jun Ahn, Satoshi Takahashi, Hiroshi Harada
2005 J jnl
Differential Modulated Pilot Symbol Assisted Adaptive OFDM for Reducing the MLI with Predicted FBI.
IEICE Trans. Commun.
Chang-Jun Ahn, Satoshi Takahashi, Hiroshi Harada
2005 J jnl
Effect of Delay Spread Enhancement in MIMO Eigenbeam Space Division Multiplexing Transmission.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Satoshi Takahashi, Chang-Jun Ahn, Hiroshi Harada, Yukiyoshi Kamio
2004 B conf
Dynamic parameter controlled orthogonal frequency and time division multiple access.
PIMRC
Hiroshi Harada, Chang-Jun Ahn, Satoshi Takahashi, Yukiyoshi Kamio, Seiichi Sampei
2004 C conf
Reverse link performance improvement for an wideband OFDM using Alamouti coded heterogeneous polarization antennas.
ISCC
Chang-Jun Ahn, K. Kamio, Satoshi Takahashi, Hiroshi Harada
2003 J jnl
Pilot symbol assisted high speed packet transmission system based on adaptive OFDM in broadband mobile channel.
J. Commun. Networks
Chang-Jun Ahn, Iwao Sasase
2002 J jnl
Code Orthogonalizing Filter Based Adaptive Array Antenna Using Common Correlation Matrix of Time Domain Signals for Multicarrier DS/CDMA Systems.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Chang-Jun Ahn, Iwao Sasase
2002 J jnl
The effects of modulation combination, target BER, Doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel.
IEEE Trans. Consumer Electron.
Chang-Jun Ahn, Iwao Sasase