Paper Info
Title
Frequency-Domain Analysis of Digital PWM-Based RF Modulators for Flexible Wireless Transmitters
Abstract
This paper presents a frequency-domain analysis of the noise and distortion terms produced by a digital RF modulator that uses pulse width modulation (PWM) for the amplitude modulation and a square wave as RF carrier. Insight in these terms is important as they limit the error vector magnitude (EVM) the modulator can achieve. For each of the terms, frequency-domain expressions are derived which are valid as long as the quantization noise is small and the digital PWM is sufficiently close to natural-sampling PWM. The dependency of the terms on the different system parameters is estimated, and the calculations are supported and complemented with simulation results. The presented analysis improves the understanding of the dominant noise and distortion sources, which can significantly speed up the design of PWM-based transmitters.
Year
DOI
Venue
2014
10.1109/TCSI.2013.2264691
Circuits and Systems I: Regular Papers, IEEE Transactions  
Keywords
DocType
Volume
frequency-domain analysis,modulators,nonlinear distortion,pulse width modulation,radio transmitters,RF carrier,amplitude modulation,digital PWM,digital RF modulator,distortion source,dominant noise,error vector magnitude,flexible wireless transmitter,frequency domain analysis,pulse width modulation,quantization noise,Digital modulation,frequency-domain analysis,nonlinear distortion,pulse width modulation,radio frequency,transmitters
Journal
61
Issue
ISSN
Citations 
1
1549-8328
7
PageRank 
References 
Authors
0.53
6
3
Name
Order
Citations
PageRank
Pieter A. J. Nuyts1222.41
Patrick Reynaert246376.50
Wim Dehaene3874116.42