Title :
A HQPM-Based Transmitter with Baseband Predistorter for Simultaneous Enhancement of ACPR and PAE
Author :
Li, C.-J. ; Chen, C.-T. ; Horng, T.S. ; Jau, J.-K. ; Li, J.-Y. ; Horng, P.-K. ; Deng, D.-S.
Author_Institution :
Dept. of Electr. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung
Abstract :
Tins paper presents the comparison of signal quality and efficiency performance between simulation and experiment for a linear RF transmitter based on a hybrid quadrature polar modulation (HQPM) architecture with digital predistortion scheme. Adjacent channel power ratio (ACPR) with and without applying the baseband predistorter are both shown to demonstrate improvement in transmitter linearity. The simulated and experimental results have validated the key feature of the proposed HQPM transmitter architecture that its superior power-added efficiency (PAE) is less sensitive to the output power level in comparison with other linear transmitter architectures.
Keywords :
radio transmitters; wireless channels; HQPM-based transmitter; adjacent channel power ratio; baseband predistorter; digital predistortion scheme; hybrid quadrature polar modulation; linear transmitter architectures; power-added efficiency; signal quality; Baseband; Digital modulation; Microwave technology; Power amplifiers; Power generation; Predistortion; RF signals; Radio frequency; Transmitters; Voltage;
Conference_Titel :
Microwave Conference, 2007. APMC 2007. Asia-Pacific
Conference_Location :
Bangkok
Print_ISBN :
978-1-4244-0748-4
Electronic_ISBN :
978-1-4244-0749-1
DOI :
10.1109/APMC.2007.4555002
