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QAM to Circular Isomorphic Constellations
Kayhan, Farbod
2016In 8th Advanced Satellite Multimedia Systems Conference (ASMS/SPSC), Palma de Mallorca, Spain, 2016
Peer reviewed


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Keywords :
DVB-S2X standard; high order modulation; constellation design
Abstract :
[en] Employing high order constellations is inevitable in order to achieve higher spectral efficiency in satellite communication systems. In DVB-S2X standard, constellations with up to 256 points have been included. However, optimizing such high order constellations is a difficult task. In this paper we propose a very simple constellation design based on the radial map from QAM constellations to non-uniform APSK constellations. Our method provides a systematic way to generate a family of optimized high order constellations. We show that gains larger than 0.5 dB can be obtained with respect to the DVB-S2X constellations with 256 points. Even though the proposed constellations are essentially sub-optimal (in terms of maximizing the mutual information), they provide a very competitive test benchmark for the performance of high order constellations. Moreover, the proposed construction potentially allows for an efficient one-dimensional soft detection by an inverse mapping to the QAM. Finally, further optimization techniques are discussed.
Disciplines :
Electrical & electronics engineering
Author, co-author :
Kayhan, Farbod ;  University of Luxembourg > Interdisciplinary Centre for Security, Reliability and Trust (SNT)
External co-authors :
Language :
Title :
QAM to Circular Isomorphic Constellations
Publication date :
September 2016
Event name :
8th Advanced Satellite Multimedia Systems Conference (ASMS/SPSC)
Event date :
5-7 September 2016
Audience :
Main work title :
8th Advanced Satellite Multimedia Systems Conference (ASMS/SPSC), Palma de Mallorca, Spain, 2016
Peer reviewed :
Peer reviewed
Available on ORBilu :
since 07 July 2016


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