Four-dimensional constellations for dual-polarized satellite communications

Mazzali, Nicolo; Kayhan, Farbod; Mysore, R Bhavani Shankar

doi:10.1109/icc.2016.7511493

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…The constellation can be envisaged as a 4D constellation, where the points are placed in a hypercube. This constellation is often referred as the optimal, since it achieves the highest mutual information [34]. However, LAM constellations present major drawbacks compared to 3D PMod:…”

Section: Ber Analysismentioning

confidence: 99%

3-D Polarized Modulation: System Analysis and Performance

Henarejos

Pérez-Neira

2018

IEEE Trans. Commun.

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In this paper we present a novel modulation technique for dual polarization communication systems, which reduces the error rate compared with the existent schemes. This modulation places the symbols in a 3D constellation, rather than the classic approach of 2D. Adjusting the phase of these symbols depending on the information bits, we are able to increase the bit rate. Hence, the proposed scheme conveys information by selecting both polarization state and the phase of radiated electromagnetic wave. We also analyse the performance of 3D Polarized Modulation (PMod) for different constellation sizes and we obtain a curve of rate adaptation. Finally, we compare the proposed 3D PMod with other existing schemes such as single polarization Phase Shift Keying (PSK) and double polarization Vertical Bell Laboratories Layer Space-Time (V-BLAST), both carrying the same number of information bits. The results show that 3D PMod always outperforms all other schemes, except for low order modulation. Therefore, we can conclude that 3D PMod is an excellent candidate for medium and high modulation order transmissions.

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Section: Ber Analysismentioning

confidence: 99%

3-D Polarized Modulation: System Analysis and Performance

Henarejos

Pérez-Neira

2018

IEEE Trans. Commun.

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“…The error floors in the curves relative to 64-LAM and 64-EPPM testify that the chosen code is not suitable for these non-Cartesian constellations. Better results can be obtained by using numerically optimized constellations over the AWGN channel [23], or by considering fading channels, where the robustness stemming from the correlation between the polarizations introduced by the shaping can be exploited [24]. Since the main responsible for the losses for LAM and EPPM is the binary mapping, we have tested non-binary mappings for 64-LAM.…”

Section: A 4d Constellations In Fixed Scenariosmentioning

confidence: 99%

Advanced signal processing techniques for fixed and mobile satellite communications

Henarejos¹,

Pérez-Neira²,

Mazzali³

et al. 2016

2016 8th Advanced Satellite Multimedia Systems Conference and the 14th Signal Processing for Space Communications Workshop (ASM

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Abstract-Enabling ultra fast systems has been widely investigated during recent decades. Although polarization has been deployed from the beginning in satellite communications, nowadays it is being exploited to increase the throughput of satellite links. More precisely, the application of diversity techniques to the polarization domain may provide reliable, robust, and fast satellite communications. Better and more flexible spectrum use is also possible if transmission and reception can take place simultaneously in close or even overlapping frequency bands. In this paper we investigate novel signal processing techniques to increase the throughput of satellite communications in fixed and mobile scenarios. First, we investigate four-dimensional (4D) constellations for the forward link. Second, we focus on the mobile scenario and introduce an adaptive algorithm which selects the optimal tuple of modulation order, coding rate, and MIMO scheme that maximizes the throughput constraint to a maximum packet error rate. Finally, we describe the operation of radio transceivers which cancel actively the self-interference posed by the transmit signal when operating in full-duplex mode.

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“…where the points are placed in a hypercube. This constellation is often referred as the optimal, since achieves the highest mutual information [MKM16]. However, LAM constellations present major drawbacks compared to 3D PMod:…”

Section: Ber Analysis 115mentioning

confidence: 99%

Polarization and index modulations : a theoretical and practical perspective

Henarejos Hernández

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Radiocommunication systems have evolved significantly in recent years in order to meet present and future demands. Historically, time, frequency and more recently, spatial dimensions have been used to improve capacity and robustness. Paradoxically, radiocommunications that leverage the polarization dimension have not evolved at the same pace. In particular, these communications are widely used by satellites, where several streams are multiplexed in each orthogonal polarization. Current communication trends advocate for simplifying and unifying different frameworks in order to increase flexibility and address future needs. Due to this, systems that do not require channel information are progressively gaining traction, as they help to improve the overall quality of the network instead of that of specific users only. The search for new paradigms aimed at improving the quality of wireless communications is unstoppable. In order to increase the capacity of current communications systems, new horizons and physical dimensions must be explored. This dissertation aims at challenging this perspective and promoting the use of polarization in new radiocommunication systems. Consequently, the goal of this thesis is twofold: first, we aim at increasing the current capacity of point-to-point and point-to-multipoint links. Secondly, we introduce new mechanisms to increase the robustness of communications in particularly hostile environments. In this context, this thesis advocates for the use of polarization as a dimension to be exploited in radiocommunications. In addition to the use of polarization, index modulations help increase transmission rates whilst improving robustness against errors and imperfections with a low computational complexity. Thus, the study of polarization in these systems is essential. This dissertation explores primordial aspects in this area, such as channel capacity, transmitter and receiver design and performance benchmarking with current systems. Finally, we identify and discuss various characteristic aspects of polarization. In this thesis, the reader will navigate the mathematical foundations of the proposed concepts as well as their implementation in real-life scenarios. La cerca de nous paradigmes que milloren la qualitat de les comunicacions inalàmbriques és constant i imparable. Per aquesta raó es fa necessari buscar nous horitzons i noves dimensions físiques que permetin incrementar la capacitat actual de les comunicacions. La present dissertació vol canviar aquesta perspectiva i potenciar l'ús de la polarització en els nous sistemes de radiocomunicacions. L'objectiu d'aquesta tesi doctoral és doble: primer, incrementar la capacitat actual dels enllaços punt a punt i punt a multipunt i, segon, dotar-los de millor robustesa davant d'entorns hostils. Per això, aquesta tesi presenta la polarització com a una dimensió a explotar en les radiocomunicacions. Paral·lelament, les modulacions per índex incrementen la velocitat de transmissió, alhora que proporcionen una major robustesa davant errors i imperfeccions, tot mantenint una baixa complexitat computacional. Així doncs, l'estudi de la polarització en aquests sistemes es fa necessari i primordial. El present manuscrit estudia aspectes com la capacitat de canal en aquests àmbits, el seu disseny tant del transmissor com del receptor, així com comparacions amb sistemes existents. Finalment, també s'analitzen diferents aspectes característics i únics de la polarització i es proposa una nova modulació en 3 dimensions, únicament possible utilitzant la polarització. En aquesta dissertació el lector podrà trobar els fonaments matemàtics que sustenten el que es presenta així com implementacions realistes de les diferents propostes en entorns reals

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Four-dimensional constellations for dual-polarized satellite communications

Cited by 4 publications

References 27 publications

3-D Polarized Modulation: System Analysis and Performance

3-D Polarized Modulation: System Analysis and Performance

Advanced signal processing techniques for fixed and mobile satellite communications

Polarization and index modulations : a theoretical and practical perspective

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