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Comparison of multiple‐input single‐output single‐user ultra‐wideband systems with pre‐distortion
Author(s) -
Angélico B.A.,
Jeszensky P.J.E.,
Burt P.M.S.,
Hodgkiss W.S.,
Abrão T.
Publication year - 2012
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.1528
Subject(s) - equaliser , minimum mean square error , intersymbol interference , algorithm , computer science , baseband , distortion (music) , mean squared error , channel (broadcasting) , transmitter , reduction (mathematics) , computational complexity theory , control theory (sociology) , mathematics , telecommunications , estimator , statistics , amplifier , control (management) , bandwidth (computing) , artificial intelligence , geometry
This paper presents a performance analysis of a baseband multiple‐input single‐output ultra‐wideband system over scenarios CM1 and CM3 of the IEEE 802.15.3a channel model, incorporating four different schemes of pre‐distortion: time reversal, zero‐forcing pre‐equaliser, constrained least squares pre‐equaliser, and minimum mean square error pre‐equaliser. For the third case, a simple solution based on the steepest‐descent (gradient) algorithm is adopted and compared with theoretical results. The channel estimations at the transmitter are assumed to be truncated and noisy. Results show that the constrained least squares algorithm has a good trade‐off between intersymbol interference reduction and signal‐to‐noise ratio preservation, providing a performance comparable to the minimum mean square error method but with lower computational complexity. Copyright © 2011 John Wiley & Sons, Ltd.