Quadrature-modulation envelope-pulse-width-modulation transmission system using quadrature polarized waves. - Ryo Sakai; Tomoaki Morita; Yohtaro Umeda; Yusuke Kozawa (MWSCAS, 2017)

Comparison between Quadrature-modulation EPWM transmitters with a 90° and 180° hybrid in physical models. - Tomoaki Morita; Yohtaro Umeda (ICECS, 2018)