Kazushi MURAOKA


Performance Evaluation of Low Complexity Digital Beamforming Algorithms by Link-Level Simulations and Outdoor Experimental Trials for 5G Low-SHF-Band Massive MIMO
Tatsuki OKUYAMA Satoshi SUYAMA Jun MASHINO Kazushi MURAOKA Kohei IZUI Kenichiro YAMAZAKI Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1382-1389
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5GMassive MIMOdigital beamformingoutdoor experimental trialslow SHF bands
 Summary | Full Text:PDF

Field Trial of 28GHz Band 5G Downlink Massive MIMO Employing Beam Tracking in Railway Environment
Yuta TAKAHASHI Tatsuki OKUYAMA Kazushi MURAOKA Satoshi SUYAMA Jun MASHINO Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1411-1417
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5Ghigh mobilitymassive MIMObeamformingbeam tracking
 Summary | Full Text:PDF

Recent Activities of 5G Experimental Trials on Massive MIMO Technologies and 5G System Trials Toward New Services Creation
Yukihiko OKUMURA Satoshi SUYAMA Jun MASHINO Kazushi MURAOKA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1352-1362
Type of Manuscript:  INVITED PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
fifth generation mobile communication systemradio access technologyhigher frequency bandexperimental trialsystem trial
 Summary | Full Text:PDF

Relay Selection Scheme Based on Path Throughput for Device-to-Device Communication in Public Safety LTE
Taichi OHTSUJI Kazushi MURAOKA Hiroaki AMINAKA Dai KANETOMO Yasuhiko MATSUNAGA 
Publication:   
Publication Date: 2018/05/01
Vol. E101-B  No. 5  pp. 1319-1327
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
device-to-device (D2D) communicationpublic safety LTEUE-to-network relayrelay selection
 Summary | Full Text:PDF

Signal Detection for EM-Based Iterative Receivers in MIMO-OFDM Mobile Communications
Kazushi MURAOKA Kazuhiko FUKAWA Hiroshi SUZUKI Satoshi SUYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/11/01
Vol. E97-B  No. 11  pp. 2480-2490
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
mobile communicationMIMO-OFDMEM algorithmfactor graphmessage passingsignal detectionchannel estimation
 Summary | Full Text:PDF

Interference Monitoring-Based Spectrum Management to Maximize White Space Utilization for Cognitive Radios
Kazushi MURAOKA Hiroto SUGAHARA Masayuki ARIYOSHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/03/01
Vol. E96-B  No. 3  pp. 869-879
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
cognitive radioopportunistic spectrum accessspectrum managementInterference Monitoring
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Cooperative Sensing with Distributed Pre-Detection for Gathering Sensing Information on Shared Primary Spectrum
Mai OHTA Takeo FUJII Kazushi MURAOKA Masayuki ARIYOSHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/11/01
Vol. E95-A  No. 11  pp. 1980-1990
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Theory and Signals
Keyword: 
cognitive radiocooperative sensingorthogonal narrowband signalspectrum sharingaggregated interferencetransmit power design
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Iterative MAP Receiver Employing Forward Channel Estimation via Message Passing for OFDM over Fast Fading Channels
Kazushi MURAOKA Kazuhiko FUKAWA Hiroshi SUZUKI Satoshi SUYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/05/01
Vol. E95-B  No. 5  pp. 1770-1783
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
mobile communicationOFDMEM algorithmfactor graphmessage passingchannel estimationturbo processing
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Joint Signal Detection and Channel Estimation Using Differential Models via EM Algorithm for OFDM Mobile Communications
Kazushi MURAOKA Kazuhiko FUKAWA Hiroshi SUZUKI Satoshi SUYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/02/01
Vol. E94-B  No. 2  pp. 533-545
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
mobile communicationOFDMEM algorithmchannel estimationKalman filterdifferential model
 Summary | Full Text:PDF

A Robust Spectrum Sensing Method Based on Maximum Cyclic Autocorrelation Selection for Dynamic Spectrum Access
Kazushi MURAOKA Masayuki ARIYOSHI Takeo FUJII 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3635-3643
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category: Spectrum Sensing
Keyword: 
cognitive radiodynamic spectrum access (DSA)spectrum sensingcyclostationary feature detection (CFD)maximum cyclic autocorrelation selection (MCAS)
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A Novel Method for Information Gathering by Using Orthogonal Narrowband Signal for Cooperative Sensing in Cognitive Radio
Mai OHTA Takeo FUJII Kazushi MURAOKA Masayuki ARIYOSHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3625-3634
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category: Spectrum Sensing
Keyword: 
cognitive radiocooperative sensingorthogonal narrrowband signalspectrum sharing
 Summary | Full Text:PDF