Sadao TAKENAKA


A New 90 MBPS 68 APSK Modem with Honeycomb Constellation for Digital Radio Relay Systems
Hiroshi NAKAMURA Noboru IIZUKA Eisuke FUKUDA Morihiko MINOWA Yoshimasa DAIDO Sadao TAKENAKA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/06/25
Vol. E71-E  No. 6  pp. 591-599
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
 Summary | Full Text:PDF(697.7KB)

A 256 QAM Digital Radio System with a Low Rolloff Factor of 20% for Attaining 6.75 bps/Hz
Hiroshi NAKAMURA Eisuke FUKUDA Noburu IIZUKA Yoshimasa DAIDO Sadao TAKENAKA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/01/25
Vol. E71-E  No. 1  pp. 43-50
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
 Summary | Full Text:PDF(761.5KB)

Power Penalty of Multilevel QAM Modem Caused by Two Simultaneously Existing lmpairments
Yoshimasa DAIDO Sadao TAKENAKA Hiroshi NAKAMURA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/07/25
Vol. E70-E  No. 7  pp. 628-633
Type of Manuscript:  PAPER
Category: Radio Wave and Satellite Communication
Keyword: 
 Summary | Full Text:PDF(477.5KB)