Title :
Wideband measurements and linearization of a simplified architecture for analog RF-PWM
Author :
Markert, Daniel ; Haslach, Christoph ; Luz, Gerhard ; Fischer, Georg ; Pascht, Andreas
Author_Institution :
Bell Labs., Alcatel-Lucent Deutschland GmbH, Stuttgart, Germany
Abstract :
We show a universal analog signal conditioning approach for switch-mode power amplifiers. Three novel RF-PWM concepts are implemented on PCB, which work with a single RF input. The modulation-inherent distortion is compensated by a dedicated predistortion. We evaluated the performance for base stations of mobile communications in terms of ACLR, EVM, coding efficiency and channel power from 400MHz to 3 GHz. For a standard UMTS signal a coding efficiency of 82%, added EVM of 3% and ACLR of 49 dB are achieved.
Keywords :
mobile communication; power amplifiers; printed circuits; pulse width modulation; ACLR; EVM; PCB; UMTS signal; analog RF-PWM; analog signal conditioning approach; base stations; coding efficiency; dedicated predistortion; frequency 400 MHz to 3 GHz; gain 49 dB; mobile communications; simplified architecture; switch mode power amplifiers; wideband linearization; wideband measurements; Distortion measurement; Encoding; Frequency measurement; Modulation; Predistortion; Radio frequency; Wideband; mobile communications; power amplifier; pulse width modulation; signal processing; switch-mode; transmitter;
Conference_Titel :
Microwave Conference (EuMC), 2013 European
Conference_Location :
Nuremberg
