Tatsuya HAGIWARA


A 15GHz-Band 4-Channel Transmit/Receive RF Core-Chip for High SHF Wide-Band Massive MIMO in 5G
Koji TSUTSUMI Takaya MARUYAMA Wataru YAMAMOTO Takanobu FUJIWARA Tatsuya HAGIWARA Ichiro SOMADA Eiji TANIGUCHI Mitsuhiro SHIMOZAWA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-C  No. 10  pp. 825-832
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
massive MIMOactive phased array antennahigh SHFphase shiftersvariable gain amplifiersCMOS integrated circuits
 Summary | Full Text:PDF(2.9MB)

High-Speed Calculation Method of the Hurst Parameter Based on Real Traffic
Tatsuya HAGIWARA Hiroki DOI Hideki TODE Hiromasa IKEDA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2001/05/01
Vol. E84-D  No. 5  pp. 578-587
Type of Manuscript:  Special Section PAPER (Special Issue on High-speed Internet Technology and its Applications)
Category: 
Keyword: 
self-similarityhurst parameternetwork trafficnetwork control
 Summary | Full Text:PDF(1.3MB)