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A closed‐form expression for the total degradation in OFDM systems
Author(s) -
Rosati Stefano,
Candreva Enzo Alberto,
VanelliCoralli Alessandro,
Corazza Giovanni E.
Publication year - 2014
Publication title -
international journal of satellite communications and networking
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.388
H-Index - 39
eISSN - 1542-0981
pISSN - 1542-0973
DOI - 10.1002/sat.1093
Subject(s) - computer science , expression (computer science) , closed form expression , degradation (telecommunications) , monte carlo method , clipping (morphology) , orthogonal frequency division multiplexing , function (biology) , power (physics) , ideal (ethics) , amplifier , algorithm , mathematics , telecommunications , channel (broadcasting) , statistics , mathematical analysis , bandwidth (computing) , physics , linguistics , philosophy , epistemology , quantum mechanics , evolutionary biology , biology , programming language
Summary In this paper, building upon Bussgang's theorem, we present a new expression for the total degradation (TD) in OFDM systems. This novel expression is applicable to any high power amplifier (HPA) model. In case of ideal clipping HPA model and for particular realizations of Rapp and Saleh HPA models, it and can be expressed in closed form. It enables a significant speed‐up in computing TD, because it avoids end‐to‐end system simulations. As a consequence, it simplifies the evaluation of TD as a function of the back‐off, yielding a more accurate evaluation of the optimum HPA back‐off (i.e., the back‐off value that minimizes TD). Numerical results show a perfect agreement between the proposed analytical framework and the Monte Carlo simulation results.Copyright © 2014 John Wiley & Sons, Ltd.