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Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS 2009-10-16
14:55
Kyoto ATR Noise Characteristics of OFDM Signal Generated by EPWM Transmitter after Clipping and Filtering
Koji Kawazoe, Edwin M. Umali, Yasushi Yamao (The Univ. of Electro-Comm.) RCS2009-130
OFDM (Orthogonal Frequency Division Multiplexing) achieves high spectral efficiency and is suitable for broadband wirele... [more] RCS2009-130
pp.117-121
RCS 2008-08-27
16:50
Hokkaido Hokkaido University In-Band Noise Analysis and Peak-Clipping Effect on Envelope Pulse-Width Modulation(EPWM) Transmitter
Edwin M. Umali, Koji Kawazoe, Yoshikazu Toyama, Yasushi Yamao (Univ. of Electro-Comm.) RCS2008-68
The Envelope Pulse-Width Modulation (EPWM) transmitter enables a highly efficient linear amplification. Noise characteri... [more] RCS2008-68
pp.91-96
RCS, SIP 2008-01-25
11:45
Hiroshima Hiroshima City Uni. Power Efficiency of Doherty, Extended Doherty and Delta-Sigma Envelope Pulse-Width Modulation (EPWM) Transmitters for OFDM Signal Amplification
Yoshikazu Toyama, Edwin M. Umali, Yasushi Yamao (UEC) SIP2007-168 RCS2007-171
OFDM achieves high spectral efficiency in wireless communication systems. However, it is difficult to achieve high power... [more] SIP2007-168 RCS2007-171
pp.61-66
RCS, AP
(Joint)
2007-11-08
14:20
Tokyo Univ. of Electro-Commun. Delta-Sigma Emvelope Pulse-Width Modulation(EPWM) Transmitter for High Efficiency Linear Amplification
Edwin M. Umali, Yoshikazu Toyama, Yasushi Yamao (Univ. of Electro-Comm.) RCS2007-103
Multi-carrier systems such as the OFDM require linear amplification and have low power efficiency because of a high peak... [more] RCS2007-103
pp.37-42
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