Title :
A Switched Mode Envelope Tracker for Polar EDGE Transmitter
Author :
Xufeng Jiang ; Lopez, N.D. ; Maksimovic, Dragan
Author_Institution :
Dept. of Electr. Eng., Colorado Univ., Boulder, CO
Abstract :
Design and implementation of an envelope tracking switched-mode power supply (SMPS) for polar EDGE transmitter is described in this paper. The objectives are to achieve high efficiency and high fidelity tracking as well as low interferences according to the EDGE spectral mask restrictions, while providing approximately constant signal propagation delay for easy compensation in the phase-modulation path. Simulation and experimental results are shown for a closed-loop PWM buck converter switching at 4.3 MHz, using a compensator that results in the overall Bessel type low-pass transfer function
Keywords :
3G mobile communication; PWM power convertors; cellular radio; phase modulation; radio transmitters; switched mode power supplies; switching convertors; telecommunication power supplies; telecommunication standards; transfer functions; 4.3 MHz; Bessel type low-pass transfer function; EDGE spectral mask restrictions; closed-loop PWM buck converter switching; enhanced data rates for GSM evolution; phase-modulation path; polar EDGE transmitter; signal propagation delay; switched mode envelope tracker; switched-mode power supply; Communication switching; GSM; Interference; Linearity; RF signals; Radio frequency; Radio transmitters; Sliding mode control; Switched-mode power supply; Wireless communication;
Conference_Titel :
Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE
Conference_Location :
Jeju
Print_ISBN :
0-7803-9716-9
DOI :
10.1109/PESC.2006.1711933
