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IEICE Trans

Kazuki MARUTA

Combination of Phase Rotation SM-OOK and Rectangular, Cross, Octagonal SD-8QAMs for MIMO Systems
Yuta IDA Kazuki MARUTA Yasuaki OHIRA Sho KURODA Takahiro MATSUMOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2025/03/01
Vol. E108-B  No. 3  pp. 282-293
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO, PR-SM-OOK, rectangular, cross, and octagonal SD-8QAMs, 
 Summary | Full Text:PDF
Adaptive Zero-Padding with Impulsive Training Signal MMSE-SMI Adaptive Array Interference Suppression
He HE Shun KOJIMA Kazuki MARUTA Chang-Jun AHN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2023/04/01
Vol. E106-A  No. 4  pp. 674-682
Type of Manuscript:  PAPER
Category: Communication Theory and Signals
Keyword: 
channel estimation, sample matrix inversion, SNR, zero-padding, noise effect, Rician fading, 
 Summary | Full Text:PDF
Fast-Converging Constant Modulus Algorithm with Variable Step Size for Multibeam Massive MIMO
Kentaro NISHIMORI Kazuki MARUTA Takefumi HIRAGURI Hidehisa SHIOMI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/10/01
Vol. E105-B  No. 10  pp. 1154-1161
Type of Manuscript:  Special Section PAPER (Special Section on Multidisciplinary and Innovative Key technologies in Advanced communication systems (MIKA))
Category: 
Keyword: 
constant modulus, blind algorithm, variable step size, multibeam, massive MIMO, QAM, 
 Summary | Full Text:PDF
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 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2021/09/01
Vol. E104-A  No. 9  pp. 1345-1348
Type of Manuscript:  LETTER
Category: Digital Signal Processing
Keyword: 
channel estimation, pilot contamination, HTRCI, 
 Summary | Full Text:PDF
Data-Aided SMI Algorithm Using Common Correlation Matrix for Adaptive Array Interference Suppression
Kosuke SHIMA Kazuki MARUTA Chang-Jun AHN 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2021/02/01
Vol. E104-A  No. 2  pp. 404-411
Type of Manuscript:  Special Section PAPER (Special Section on Signal Design and Its Applications in Communications)
Category: Digital Signal Processing
Keyword: 
adaptive array, channel estimation, sample matrix invesion, decision feedback, 
 Summary | Full Text:PDF
Multi Modulus Signal Adaptation for Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems
Kazuki MARUTA Chang-Jun AHN 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2021/02/01
Vol. E104-B  No. 2  pp. 158-168
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
massive MIMO, multicell, pilot contamination, multi modulus algorithm, channel estimation, decision feedback, beamspace, minimum mean square error, 
 Summary | Full Text:PDF
Improving Semi-Blind Uplink Interference Suppression on Multicell Massive MIMO Systems: A Beamspace Approach
Kazuki MARUTA Chang-Jun AHN 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1503-1511
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
massive MIMO, multicell, pilot contamination, adaptive array, constant modulus algorithm, channel estimation, decision feedback, beamspace, 
 Summary | Full Text:PDF
Experimental Verification of Null-Space Expansion for Multiuser Massive MIMO via Channel State Information Measurement
Tatsuhiko IWAKUNI Kazuki MARUTA Atsushi OHTA Yushi SHIRATO Masataka IIZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2018/03/01
Vol. E101-B  No. 3  pp. 877-884
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
massive MIMO, multiuser MIMO, null-space expansion, channel time variation, inter-user interference, 
 Summary | Full Text:PDF
Experimental Investigation of Space Division Multiplexing on Massive Antenna Systems for Wireless Entrance
Kazuki MARUTA Atsushi OHTA Satoshi KUROSAKI Takuto ARAI Masataka IIZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1436-1448
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
massive MIMO, multiuser MIMO, channel measurement, line-of-sight propagation, inter-user interference cancellation, spatial correlation, 
 Summary | Full Text:PDF
Null-Space Expansion for Multiuser Massive MIMO Inter-User Interference Suppression in Time Varying Channels
Tatsuhiko IWAKUNI Kazuki MARUTA Atsushi OHTA Yushi SHIRATO Takuto ARAI Masataka IIZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2017/05/01
Vol. E100-B  No. 5  pp. 865-873
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
inter-user interference, channel time variation, multiuser MIMO, massive MIMO, null-space expansion, 
 Summary | Full Text:PDF
Massive Antenna Systems for Wireless Entrance (MAS-WE): Practical Application of Massive MIMO with Simplified Space Division Multiplexing Schemes
Kazuki MARUTA Atsushi OHTA Satoshi KUROSAKI Takuto ARAI Masataka IIZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2017/05/01
Vol. E100-B  No. 5  pp. 779-787
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
Massive MIMO, Multiuser MIMO, inter-user interference cancellation, scheduling, spatial channel correlation, sectorization, 
 Summary | Full Text:PDF
Antenna Array Arrangement for Massive MIMO to Reduce Channel Spatial Correlation in LOS Environment
Takuto ARAI Atsushi OHTA Yushi SHIRATO Satoshi KUROSAKI Kazuki MARUTA Tatsuhiko IWAKUNI Masataka IIZUKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2017/04/01
Vol. E100-B  No. 4  pp. 594-601
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
massive MIMO, multi-user MIMO, antenna arrangement, line of sight, spatial correlation, 
 Summary | Full Text:PDF
Blind Interference Suppression Scheme by Eigenvector Beamspace CMA Adaptive Array with Subcarrier Transmission Power Assignment for Spectrum Superposing
Kazuki MARUTA Jun MASHINO Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/06/01
Vol. E98-B  No. 6  pp. 1050-1057
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
adaptive array, Subcarrier Transmission Power Assignment (STPA), blind algorithm, Eigenvector Beamspace Adaptive Array (EBAA), Constant Modulus Algorithm (CMA), spectrum superposing, 
 Summary | Full Text:PDF
Spectral Efficiency Improvement of Fractional Frequency Reuse by Inter-Cell Interference Cancellation on Cooperative Base Station
Kazuki MARUTA Atsushi OHTA Masataka IIZUKA Takatoshi SUGIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/06/01
Vol. E95-B  No. 6  pp. 2164-2168
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
inter-cell interference cancellation, base station cooperation, fractional frequency reuse, 
 Summary | Full Text:PDF
Data Transmission Using Original Coils in Resonant Wireless Power Transmission
Takashi MARUYAMA Tatsuya SHIMIZU Mamoru AKIMOTO Kazuki MARUTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/11/01
Vol. E94-B  No. 11  pp. 3172-3174
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
resonant wireless power transmission, data transmission, load modulation, equivalent circuit, 
 Summary | Full Text:PDF