Four-dimensional signalling schemes - Application to satellite communications
In satellite communications both polarizations of an electromagnetic wave are used to transmit two separate signals. These two independent signals can be merged to form one dual-polarization, four-dimensional signal. The present article pursues this idea and proposes different signal constellations...
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Main Authors | , , , |
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Format | Journal Article |
Language | English |
Published |
14.11.2015
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Subjects | |
Online Access | Get full text |
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Summary: | In satellite communications both polarizations of an electromagnetic wave are
used to transmit two separate signals. These two independent signals can be
merged to form one dual-polarization, four-dimensional signal.
The present article pursues this idea and proposes different signal
constellations to be used for four-dimensional signalling in satellite links.
Analytical methods and simulations predict an increased power efficiency of
these constellations with respect to currently used transmission methods. The
cost of this advantage is evaluated considering the limited applicability in
non-linear channels.
Four-dimensional signalling also implies simultaneous reception on both
polarizations. Such a combined reception allows the precision of timing and
carrier recovery loops to be doubled. This claim is derived analytically and
illustrated by simulating an example case.
An experimental transmitter/receiver pair was implemented and used to
demonstrate a satellite transmission using a four-dimensional, bi-orthogonal
signal in the dual-polarization channel. The experimental verification confirms
the presented simulation results. |
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DOI: | 10.48550/arxiv.1511.04557 |