Optimization and Performance of Non-Uniform Rotated Constellations With Multi-RF Transmission Techniques

Fuentes, Manuel; Giménez, Jordi Joan; Gómez-Barquero, David

doi:10.1109/tbc.2016.2576601

Cited by 7 publications

(4 citation statements)

References 20 publications

(32 reference statements)

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“…Since the paper compares the transmission performance of the CB division mode, related works of ATSC 3.0 and this paper are different. An additional work of ATSC 3.0 reported the optimization of NUC in the CB transmission 14) . Since the work only mentioned the computer simulation, it is different from this paper, which includes both the computer simulation and laboratory test.…”

Section: Related Workmentioning

confidence: 99%

[Paper] A Study on Channel Bonding for Advanced ISDB-T

Asakura,

Sato,

Kambara

2024

MTA

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We are currently developing Advanced Integrated Services Digital Broadcasting-Terrestrial (Advanced ISDB-T) system toward the next generation of digital terrestrial television broadcasting. Advanced ISDB-T can provide a fixed reception service and a mobile reception service simultaneously. Furthermore, a channel bonding (CB) scheme that uses multiple radio frequency (RF) signals is useful to expand the transmission capacity as an optional function of Advanced ISDB-T. For example, CB scheme in Advanced ISDB-T enables to provide a flexible service such that an ultra-high definition (UHD) service can use the CB and HD service in a single channel. In this paper, we study the application of a CB scheme for Advanced ISDB-T, which has two division modes: division of the data stream in the transport layer and that in the physical layer. We evaluated the transmission performances using computer simulations and laboratory tests. Furthermore, the feasibilities of the CB transmissions were verified by a laboratory test using a prototype equipment.

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Section: Related Workmentioning

confidence: 99%

[Paper] A Study on Channel Bonding for Advanced ISDB-T

Asakura,

Sato,

Kambara

2024

MTA

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“…If the demapping complexity of the proposed condensed NUCs is compared to the exhaustive method ML, complexity reductions up to 93.75% are found for 2D-256NUC and 2/15 code rate. Fuentes et al [55] study the optimization of NUCs taking into account the RC and multi-RF transmission techniques included in ATSC 3.0. The authors propose using RC and multi-RF jointly with NUCs for high SNR values to increase the system's spectral efficiency.…”

Section: B Terrestrial Broadcastingmentioning

confidence: 99%

“…In order to provide highly efficient communication systems, especially in terms of data rate, we strongly recommend designing the massive order constellations close to Shannon's limit [127]. Although existing standard constellations (e.g., [60] NUCs exploiting the 60 GHz band X X X X [52] NUCs for future releases of 5G X X X X DTT Wireless Systems [107] Design of NUCs via GS X X X X X [54] GS design for BICM system X X X X X X [55] NUCs via GS with RC and multi-RF X X X X Satellite Communication Systems [111] Study of APSK via GS and PS X X [118] APSK design via GS for DVB-S2 X X X [58] APSK design via PS using genetic algorithm X X QPSK, BPSK) are close to Shannon's limit on the low SNR region [128], [129], there is still a big gap to reach the capacity limit for medium and high SNR. The design method should be flexible enough to create capacity-approaching massive order constellations in a short period (directly associated with the computational complexity), i.e., above 1024 constellation points in minutes or hours [75], [76].…”

Section: ) Channel Capacitymentioning

confidence: 99%

Constellation Design for Future Communication Systems: A Comprehensive Survey

Barrueco¹,

Montalbán

Iradier

et al. 2021

IEEE Access

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The choice of modulation schemes is a fundamental building block of wireless communication systems. As a key component of physical layer design, they critically impact the expected communication capacity and wireless signal robustness. Their design is also critical for the successful rollout of wireless standards that require a compromise between performance, efficiency, latency, and hardware requirements. This paper presents a survey of constellation design strategies and associated outcomes for wireless communication systems. The survey discusses their performance and complexity to address the need for some desirable properties, including consistency, channel capacity, system performance, required demapping architecture, flexibility, and independence. Existing approaches for constellation designs are investigated using appropriate metrics and categorized based on their theoretical algorithm design. Next, their application to different communication standards is analyzed in context, aiming at distilling general guidelines applicable to the wireless building block design. Finally, the survey provides a discussion on design directions for future communication system standardization processes.INDEX TERMS Bandwidth, communication waveforms, mobile communications, spectral efficiency, wireless communications.

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“…When applying an additional rotation to a NUC, there are two different possibilities [103]. The simplest way is to optimize first the constellation symbols and apply afterwards a rotation, at the expense of a penalty loss (constellations are optimized without including the rotation).…”

Section: Non-uniform Rotated Constellationsmentioning

confidence: 99%

Non-Uniform Constellations for Next-Generation Digital Terrestrial Broadcast Systems

Muela¹

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Nowadays, the digital terrestrial television (DTT) market is characterized by the high capacity needed for high definition TV services, and the limited spectrum available. There is a need for an efficient use of the broadcast spectrum, which requires new technologies to guarantee increased capacities. NonUniform Constellations (NUC) arise as one of the most innovative techniques to approach those requirements. These constellations have been implemented in next-generation broadcast systems such as DVB-NGH (Digital Video Broadcasting -Next Generation Handheld) or ATSC 3.0 (Advanced Television Systems Committee -Third Generation). NUCs reduce the gap between uniform Gray-labelled Quadrature Amplitude Modulation (QAM) constellations and the theoretical unconstrained Shannon limit. With these constellations, symbols are optimized in both in-phase (I) and quadrature (Q) components by means of signal geometrical shaping, considering a certain signal-to-noise ratio (SNR) and channel model.There are two types of NUC, depending on the number of real-valued dimensions considered in the optimization process, i.e. one-dimensional and two dimensional NUCs (1D-NUC and 2D-NUC, respectively). 1D-NUCs maintain the squared shape from QAM, but relaxing the distribution between constellation symbols in a single component, with non-uniform distance between them. These constellations provide better SNR performance than QAM, without any demapping complexity increase. 2D-NUCs also relax the square shape constraint, allowing to optimize the symbol positions in both dimensions, thus achieving higher capacity gains and lower SNR requirements. However, the use of 2D-NUCs implies a higher demapping complexity, since a 2D-demapper is needed, i.e. I and Q components cannot be separated.In this dissertation, NUCs are analyzed from both transmit and receive point of views, using either single-input single-output (SISO) or multiple-input multiple-output (MIMO) antenna configurations. In SISO transmissions, 1D-NUCs and 2D-NUCs are optimized for a wide range of SNRs, several channel models and different constellation orders, using the Nelder-Mead optimization 3 ABSTRACT algorithm. The optimization of rotated 2D-NUCs is also investigated, including the rotation angle as an additional variable in the optimization. Even though the demapping complexity is not increased, the SNR gain of these constellations is not significant. The highest rotation gain is obtained for low-order constellations and high SNRs. However, with multi-RF techniques such as Channel Bonding (CB) or Time-Frequency Slicing (TFS), the SNR gain is drastically increased, since I and Q components are transmitted in different RF channels. In this thesis, multi-RF gains of NUCs with and without rotation are provided for some representative scenarios.At the receiver, two different implementation bottlenecks are explored. First, the demapping complexity of all considered constellations is analyzed. Afterwards, two complexity reduction algorithms for 2D-NUCs are proposed. Both algor...

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Optimization and Performance of Non-Uniform Rotated Constellations With Multi-RF Transmission Techniques

Cited by 7 publications

References 20 publications

[Paper] A Study on Channel Bonding for Advanced ISDB-T

[Paper] A Study on Channel Bonding for Advanced ISDB-T

Constellation Design for Future Communication Systems: A Comprehensive Survey

Non-Uniform Constellations for Next-Generation Digital Terrestrial Broadcast Systems

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