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Wireless Personal Communications
Published in: Wireless Personal Communications 3/2014

01-12-2014

A New Metric for the Envelope of OFDM Signals Based on Memory Power Amplifier

Authors: Xiangyin Zhang, Xiaodong Zhu, Youxi Tang

Published in: Wireless Personal Communications | Issue 3/2014

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Abstract

Orthogonal frequency division multiplexing (OFDM) signals with large envelope variations usually requires power de-rating operation on the power amplifier (PA) to meet the requirement of adjacent channel leakage ratio of systems. Peak-to-average power ratio (PAPR) and cubic metric (CM) are two metrics commonly used to characterize the envelope of OFDM signals. And the amount of power de-rating is determined by their values. However, both PAPR and CM do not take the memory effects (MEs) of PA into account. Actually, for wideband system such as OFDM, the inherent MEs in PA can not be ignored any more. In this paper, we study the behavioral model of PA with memory and sufficiently analyze the impacts of memory PA on OFDM signals. Based on our analysis, a new metric for the envelope characteristics of OFDM signals is proposed. The simulation results show that the proposed metric provides much more accurate prediction on required power de-rating of PA than both PAPR and CM. So the new metric is a better choice for the envelope characteristics of OFDM signals.
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Metadata
Title
A New Metric for the Envelope of OFDM Signals Based on Memory Power Amplifier
Authors
Xiangyin Zhang
Xiaodong Zhu
Youxi Tang
Publication date
01-12-2014
Publisher
Springer US
Published in
Wireless Personal Communications / Issue 3/2014
Print ISSN: 0929-6212
Electronic ISSN: 1572-834X
DOI
https://doi.org/10.1007/s11277-014-1964-z

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