Takeshi MATSUMURA


Determining Memory Polynomial Model Parameters from Those of Complex p-th Order Inverse for Designing Predistorter
Michiharu NAKAMURA Eisuke FUKUDA Yoshimasa DAIDO Keiichi MIZUTANI Takeshi MATSUMURA Hiroshi HARADA 
Publication:   
Publication Date: 2021/11/01
Vol. E104-B  No. 11  pp. 1429-1440
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
behavioral modelmemory polynomialdigital predistorter (DPD)non-linear power amplifierlinearlizer
 Summary | Full Text:PDF(2.6MB)

Highly Efficient Sensing Methods of Primary Radio Transmission Systems toward Dynamic Spectrum Sharing-Based 5G Systems
Atomu SAKAI Keiichi MIZUTANI Takeshi MATSUMURA Hiroshi HARADA 
Publication:   
Publication Date: 2021/10/01
Vol. E104-B  No. 10  pp. 1227-1236
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Sharing for Future Wireless Systems)
Category: 
Keyword: 
spectrum sharingOFDMsignal detectionfield pickup unit (FPU)5G
 Summary | Full Text:PDF(1.7MB)

A Virtual Pre-Connection Scheme Enabling Fast Connection to Local Spot Cell in Private Cellular Network
Kazuo IBUKA Hikaru KAWASAKI Takeshi MATSUMURA Fumihide KOJIMA 
Publication:   
Publication Date: 2021/09/01
Vol. E104-B  No. 9  pp. 1129-1137
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond)
Category: 
Keyword: 
virtual pre-connectionassist cellfast connectionprivate cellular networklocal spot cell
 Summary | Full Text:PDF(4.1MB)

Enhanced Universal Filtered-DFTs-OFDM for Long-Delay Multipath Environment
Yuji MIZUTANI Hiroto KURIKI Yosuke KODAMA Keiichi MIZUTANI Takeshi MATSUMURA Hiroshi HARADA 
Publication:   
Publication Date: 2020/04/01
Vol. E103-B  No. 4  pp. 467-475
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
CP-DFTs-OFDMUF-DFTs-OFDMlong-delay multipath fading environmentLTEbeyond 5G
 Summary | Full Text:PDF(2.2MB)

Comprehensive Performance Evaluation of Universal Time-Domain Windowed OFDM-Based LTE Downlink System
Keiichi MIZUTANI Takeshi MATSUMURA Hiroshi HARADA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1728-1740
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
CP-OFDMUTW-OFDMtime-domain windowingLTEout-of-band emission (OOBE)block error rate (BLER)complexity
 Summary | Full Text:PDF(4.9MB)

A Prototype of TV White Space Spectrum Sensing and Power Measurement
Chunyi SONG Takeshi MATSUMURA Hiroshi HARADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/02/01
Vol. E97-B  No. 2  pp. 314-325
Type of Manuscript:  Special Section PAPER (Special Section on Technologies for Effective Utilization of Spectrum White Space)
Category: 
Keyword: 
sensing prototypeFCC sensing requirementsphysical featurescost performance ratio
 Summary | Full Text:PDF(3MB)