Power Efficiency of OFDM Signal Amplification with Doherty and Extended Doherty Transmitters. - Yasushi Yamao; Yoshikazu Toyama; Edwin M. Umali (EW, 2008)

Power Spectral Analysis of the Envelope Pulse-Width Modulation (EPWM) Transmitter for High Efficiency Amplification of OFDM Signals. - Edwin M. Umali; Yoshikazu Toyama; Yasushi Yamao (VTC Spring, 2008)

Effects of Quantization Noise and Distortion in EPWM Transmitters for OFDM Signal Amplification. - Edwin M. Umali; Koji Kawazoe; Yoshikazu Toyama; Yasushi Yamao (VTC Spring, 2009)