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ORCIDChang-Jun Ahn
- > Home > Persons > Chang-Jun Ahn
Publications
- 2023
[j56]Hiroaki Kobayashi, Shun Kojima
, Kazuki Maruta, Takatoshi Sugiyama, Chang-Jun Ahn:
CNN-based blind SIR classification framework for STPA-BAA spectrum superposing. ICT Express 9(1): 57-62 (2023)- [j55]He He, Shun Kojima, Kazuki Maruta, Chang-Jun Ahn:
Adaptive Zero-Padding with Impulsive Training Signal MMSE-SMI Adaptive Array Interference Suppression. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 106(4): 674-682 (2023) - [j54]Shun Kojima, Yuta Goto, Kazuki Maruta, Shinya Sugiura, Chang-Jun Ahn:
Timing Synchronization Based on Supervised Learning of Spectrogram for OFDM Systems. IEEE Trans. Cogn. Commun. Netw. 9(5): 1141-1154 (2023) - 2022
- [c56]Shun Kojima, Yi Feng, Kazuki Maruta, Kanemitsu Ootsu, Takashi Yokota, Chang-Jun Ahn, Vahid Tarokh:
Towards Deep Learning-Guided Multiuser SNR and Doppler Shift Detection for Next-Generation Wireless Systems. VTC Spring 2022: 1-6 - 2021
- [j53]Kosuke Shima, Shun Kojima, Koki Ito, Kazuki Maruta, Chang-Jun Ahn:
Adaptive Subcarrier Grouping for MMSE-SMI Adaptive Array Interference Suppression. IEEE Access 9: 18361-18372 (2021) - [j52]Shun Kojima, He He, Takaki Omura, Kazuki Maruta, Chang-Jun Ahn:
Generalized Regression Neural Network Based Fast Fading Channel Tracking Using Frequency-Domain CSI Smoothing. IEEE Access 9: 142425-142436 (2021) - [j51]Nobutaka Funaki, Kazuki Maruta, Chang-Jun Ahn:
Dimensionality reduction of interference subspace for multiuser massive MIMO null-space expansion. Digit. Signal Process. 114: 103063 (2021) - [j50]Kosuke Shima, Kazuki Maruta, Chang-Jun Ahn:
Data-Aided SMI Algorithm Using Common Correlation Matrix for Adaptive Array Interference Suppression. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 104-A(2): 404-411 (2021) - [j49]Kakeru Matsubara, Shun Kuroki, Koki Ito, Kazushi Shimada, Kazuki Maruta, Chang-Jun Ahn:
Pilot De-Contamination by Modified HTRCI with Time-Domain CSI Separation for Two-Cell MIMO Downlink. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 104-A(9): 1345-1348 (2021) - [j48]Kazuki Maruta, Chang-Jun Ahn:
Multi Modulus Signal Adaptation for Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems. IEICE Trans. Commun. 104-B(2): 158-168 (2021) - [j47]Shun Kojima, Kazuki Maruta, Yi Feng, Chang-Jun Ahn, Vahid Tarokh:
CNN-Based Joint SNR and Doppler Shift Classification Using Spectrogram Images for Adaptive Modulation and Coding. IEEE Trans. Commun. 69(8): 5152-5167 (2021) - [c52]He He, Shun Kojima, Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn:
Variable Frame Splitting for Polar Coded MIMO E-SDM in Fast Fading Channel. VTC Fall 2021: 1-5 - [c51]Shun Kojima, Yi Feng, Kazuki Maruta, Kanemitsu Ootsu, Takashi Yokota, Chang-Jun Ahn, Vahid Tarokh:
Investigation of Input Signal Representation to CNN for Improving SNR Classification Accuracy. VTC Fall 2021: 1-5 - 2020
- [j46]Kabuto Arai, Kazuki Maruta, Chang-Jun Ahn:
Uplink Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels Under Unknown Interference. IEEE Access 8: 224292-224305 (2020) - [j45]Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn:
Frame splitting and data-aided decision direct channel estimation for OFDM in fast varying fading channels. ICT Express 6(3): 249-252 (2020) - [c50]Shun Kojima, Kazuki Maruta, Chang-Jun Ahn:
High-precision SNR Estimation by CNN using PSD Image for Adaptive Modulation and Coding. VTC Spring 2020: 1-5 - [c49]Kazuki Maruta, Shun Kojima, Chang-Jun Ahn, Daisuke Hisano, Yu Nakayama:
Blind SIR Estimation by Convolutional Neural Network Using Visualized IQ Constellation. VTC Spring 2020: 1-2 - [c48]Kabuto Arai, Kazuki Maruta, Chang-Jun Ahn:
High Beamforming Gain Precoding Weight Design Scheme with Null-Space Expansion for Multiuser Massive MIMO in Time-Varying Channels. WPMC 2020: 1-4 - [c47]Nobutaka Funaki, Kazuki Maruta, Chang-Jun Ahn:
Improved Null-Space Expansion Scheme under Presence of Channel Estimation Error for Multiuser Massive MIMO. WPMC 2020: 1-4 - [c46]Toshiya Hanada, Chang-Jun Ahn, Kazuki Maruta:
Improving DOA Estimation Accuracy by Rotating Planar Array Antenna. WPMC 2020: 1-4 - [c45]Seiya Hirano, Kazushi Shimada, Shun Kojima, Kazuki Maruta, Chang-Jun Ahn:
Reducing FBI and MLI Using FSS Method for Adaptive Modulated VLC-OFDM System. WPMC 2020: 1-4 - [c44]Hiroaki Kobayashi, Kazuki Maruta, Takatoshi Sugiyama, Chang-Jun Ahn:
Computationally Efficient SLM based PAPR Reduction for STPA-BAA Scheme. WPMC 2020: 1-4 - 2019
- [j44]Shun Kojima, Kazuki Maruta, Chang-Jun Ahn:
Adaptive Modulation and Coding Using Neural Network Based SNR Estimation. IEEE Access 7: 183545-183553 (2019) - [j43]Satoshi Taroda, Ken Tezuka, Shoichi Higuchi, Chang-Jun Ahn, Kazuki Maruta:
Transmit power imbalance reduction method and nonlinear companding transform for beamforming OFDM systems. ICT Express 5(4): 261-265 (2019) - [j42]Takashi Akao, Koya Watanabe, Shun Kojima, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn:
Reducing channel spatial correlation by rotating planar antenna array. ICT Express 5(4): 271-275 (2019) - [j41]Koya Watanabe, Shun Kojima, Takashi Akao, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn:
Modified pilot selection for channel estimation of systematic polar coded MIMO-OFDM. ICT Express 5(4): 276-279 (2019) - [j40]Kazuki Maruta, Chang-Jun Ahn:
Improving Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems: A Beamspace Approach. IEICE Trans. Commun. 102-B(8): 1503-1511 (2019) - [c43]Koki Ito, Kazuki Maruta, Chang-Jun Ahn:
Outage Probability Analysis of MF Precoded Massive MIMO with Multi-antenna User Environment. APCC 2019: 50-54 - [c42]Kouichi Motosugi, Kentaro Yonei, Kazuki Maruta, Chang-Jun Ahn:
Fast Fading Compensation by Frame Splitting and Decision Directed Channel Extrapolation for OFDM. APCC 2019: 131-135 - [c41]Kazushi Shimada, Mitsuki Takahashi, Kazuki Maruta, Chang-Jun Ahn:
Channel Ranking based Spread Code Optimization for Visible Light Communication OFDM-IDMA Systems. APCC 2019: 185-189 - [c40]Kakeru Matsubara, Shun Kuroki, Kazuki Maruta, Chang-Jun Ahn:
Modified HTRCI with Time-domain CSI Separation for Pilot De-contamination. APCC 2019: 226-231 - [c39]Kosuke Shima, Katsuya Senoo, Kenta Goto, Kazuki Maruta, Chang-Jun Ahn:
Data-aided SMI Algorithm using Common Correlation Matrix for Adaptive Array Interference Suppression. APCC 2019: 398-402 - [c38]Naoya Tanuma, Ryo Marumo, Kazuki Maruta, Chang-Jun Ahn:
Known Bits Puncturing for Systematic Polar Codes. APCC 2019: 511-515 - [c37]Kazuki Maruta, Chang-Jun Ahn:
Enhanced Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems for Multi Modulus Signals. VTC Fall 2019: 1-6 - 2018
- [j39]Kazuki Maruta, Chang-Jun Ahn:
Uplink Interference Suppression by Semi-Blind Adaptive Array With Decision Feedback Channel Estimation on Multicell Massive MIMO Systems. IEEE Trans. Commun. 66(12): 6123-6134 (2018) - [c36]Koya Watanabe, Shun Kojima, Takashi Akao, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn:
Modified Pilot Selection for Systematic Polar Coded MIMO-OFDM Channel Estimation. ISPACS 2018: 237-241 - [c35]Takashi Akao, Koya Watanabe, Shun Kojima, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn:
Reducing Channel Spatial Correlation by Rotating Planar Antenna Array. ISPACS 2018: 242-245 - [c34]Kazuki Maruta, Yu Nakayama, Kazuaki Honda, Daisuke Hisano, Chang-Jun Ahn:
V2P Connectivity on Higher Frequency Band and CoMP Based Coverage Expansion. PIMRC 2018: 568-569 - [c33]Shun Kojima, Takashi Akao, Koya Watanabe, Masato Katsuno, Kazuki Maruta, Chang-Jun Ahn:
Adaptive Switching Method with AMC and FSS. SoftCOM 2018: 1-6 - 2017
- [c32]Masato Katsuno, Shoichi Higuchi, Kazuki Maruta, Chang-Jun Ahn:
Improving scattered pilot channel estimation by sector selection on FDD MIMO/OFDM systems. WPMC 2017: 22-27 - [c31]Shun Kojima, Ken Teduka, Kazuki Maruta, Chang-Jun Ahn:
Optimized adaptive modulation with considering mobile relay on FSS-OFDM system. WPMC 2017: 41-45 - [c30]Takashi Akao, Satoshi Taroda, Kazuki Maruta, Chang-Jun Ahn:
Improved common correlation matrix based SMI algorithm by channel estimation error minimization with LMS approach. WPMC 2017: 63-67 - [c29]Koya Watanabe, Shoichi Higuchi, Kazuki Maruta, Chang-Jun Ahn:
Performance of polar codes with MIMO-OFDM under frequency selective fading channel. WPMC 2017: 107-111
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