文献类型： 会议论文

第一作者： Juan I. Morales

作者： Juan I. Morales ¹ ; Fernando Chierchie ¹ ; Pablo S. Mandolesi ¹ ; Eduardo E. Paolini ¹ ;

作者机构： 1.Instituto de Investigaciones en Ing. Electrica (IIIE) Alfredo Desages (UNS-CONICET). Depto. de Ing. Electrica y de Computadoras, Universidad Nacional del Sur

关键词： Pulse-width modulation (PWM);Error vector magnitude (EVM);All-digital transmitter;Baseband distortion;FPGA

会议名称： Argentine Conference on Automatic Control

主办单位：

页码： 61-66

摘要： In this paper we present a modulator for an all-digital pulse-width modulated (PWM) transmitter based on switching amplification. In this approach, each symbol is represented by a sequence of pre-computed PWM pulse widths stored in a table that results in reduced Error Vector Magnitude (EVM), achieving low distortion with a reduced pulse-rate. The modulator is implemented in a field programmable gate array (FPGA) device. The performance of this approach is compared to a standard uniform PWM modulator. Measurements using 64-QAM signals show a reduction of EVM values from 11.61%(-18.7 dB) for uniform PWM to 2.41%(-32.4 dB) for the proposed approach.

分类号： TP273-53