Reference : Low Complexity Predistortion and Equalization in Nonlinear Multicarrier Satellite Com...
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
http://hdl.handle.net/10993/24106
Low Complexity Predistortion and Equalization in Nonlinear Multicarrier Satellite Communications
English
Zenteno, Efrain mailto []
Piazza, Roberto mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Shankar, Bhavani mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
Ronnow, Daniel mailto []
Ottersten, Björn mailto [University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT) > >]
2015
EURASIP Journal on Advances in Signal Processing
SpringerOpen
Yes (verified by ORBilu)
1687-6172
1687-6180
Heidelberg
Germany
[en] Aiming to reduce the power/mass requirements in satellite transponders and to reduce mission costs, joint
amplification of multiple carriers using a single high-power amplifier (HPA) is being considered. In this scenario, a
careful investigation of the resulting power efficiency is essential as amplification is nonlinear, and multicarrier signals
exhibit enlarged peak-to-average power ratio. Thus, operating the amplifier close to saturation vastly increases signal
distortion resulting in a severe degradation of performance, especially for higher order modulations. This paper
proposes a reduced-complexity digital predistortion (DPD) scheme at the transmitter and a corresponding equalizer
(EQ) at the receiver to mitigate these nonlinear effects. Scenarios include both the forward as well as the return links.
In particular, the paper exploits the MIMO Volterra representation and builds on a basis pursuit approach using a
LASSO (least absolute shrinkage and selection operator) algorithm to achieve an efficient basis representation,
avoiding large computational complexity, to describe the selection of predistorter/equalizer model. The work further
compares and contrasts the two mitigation techniques taking various system aspects into consideration. The gains in
performance and amplification efficiency demonstrated by the use of DPD/ EQ motivate their inclusion in
next-generation satellite systems.
http://hdl.handle.net/10993/24106

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Limited access
s13634-015-0215-0.pdfPublisher postprint1.21 MBRequest a copy

Bookmark and Share SFX Query

All documents in ORBilu are protected by a user license.