Title :
Bi-level Quadrature-modulation low-pass EPWM transmitter using half side of tri-level ΔΣ modulator
Author :
Noda, Takashi ; Someya, Wataru ; Iikura, Yoshiharu ; Umeda, Yohtaro ; Kozawa, Yusuke
Author_Institution :
Dept. of Electr. Eng., Tokyo Univ. of Sci., Chiba, Japan
Abstract :
This paper presents a bi-level quadrature-modulation (QM) low-pass (LP) envelope-pulse-width-modulation (EPWM) transmitter using a half side of tri-level EPWM. Simulation including digital signal processing with the QM LP-EPWM and microwave circuit simulation with a class-D power amplifier (PA) using n-MOSFETs shows an excellent error vector magnitude (EVM) of 36 dB at 1 GHz. The transmitter with a class-D PA for bi-level EPWM signal shows much better EVM performance than the one for trilevel signal.
Keywords :
delta-sigma modulation; microwave power amplifiers; pulse width modulation; quadrature amplitude modulation; radio transmitters; EVM; QM LP EPWM transmitter; bi-level quadrature-modulation low-pass envelope-pulse-width-modulation transmitter; class-D PA; class-D power amplifier; digital signal processing; error vector magnitude; frequency 1 GHz; microwave circuit simulation; n-MOSFETs; tri-level ΔΣ modulator; trilevel signal; Frequency modulation; MOSFET circuits; Power amplifiers; Power generation; Radio transmitters; class-D; envelope pulse-width modulation; error vector magnitude; power amplifier; power-added efficiency; quadrature modulation; transmitter;
Conference_Titel :
Power Amplifiers for Wireless and Radio Applications (PAWR), 2015 IEEE Topical Conference on
Conference_Location :
San Diego, CA
DOI :
10.1109/PAWR.2015.7139208
