Non-Linearized Amplifier and Advanced Mitigation Techniques: DVB-S2X Spectral Efficiency Improvement

Lucciardi, Jean-Alain; Potier, Philippe; Buscarlet, Guillaume; Barrami, F.; Mesnager, Gilles

doi:10.1109/glocom.2017.8255091

Cited by 8 publications

(5 citation statements)

References 18 publications

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“…also characterized, for example in [50,184]. Moreover, FTN signaling has been applied to several specific scenarios other than microwave communications, such as optical communications [47, 130, 137, 139-141, 158, 185-193], digital video broadcast [160,[194][195][196][197], the 5G cellular backhaul [198] and visible light communications [199].…”

Section: E Other Ftn Transceiver Architectures and Applicationsmentioning

confidence: 99%

The Evolution of Faster-Than-Nyquist Signaling

2021

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The fifty-year progress of faster-than-Nyquist (FTN) signaling is surveyed. FTN signaling exploits non-orthogonal dense symbol packing in the time domain for the sake of increasing the data rate attained. After reviewing the system models of both the conventional Nyquist-based and FTN signaling transceivers, we survey the evolution of FTN techniques, including their low-complexity detection and channel estimation. Furthermore, in addition to the classic FTN signaling philosophy, we introduce the recent frequency-domain filtering and precoding aided schemes. When relying on precoding, the information rate of FTN signaling becomes related to the eigenvalues of an FTN-specific intersymbol interference matrix, which provides a unified framework for the associated information-theoretic analysis and simplifies the associated power allocation specifically designed for increasing the information rate attained. We show that the FTN signaling scheme combined with bespoke power allocation employing a realistic raised-cosine shaping filter achieves the Shannon capacity associated with ideal rectangular shaping filters.

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Section: E Other Ftn Transceiver Architectures and Applicationsmentioning

confidence: 99%

The Evolution of Faster-Than-Nyquist Signaling

2021

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“…The coefficients γ k are calculated to maximize the r.h.s of (48) based on the Lagrange multiplier method. From (11) and (46), the transmit energy of the CP-added symbols…”

Section: B Power Allocationmentioning

confidence: 99%

“…It has been proved that under the assumption of employing an RRC shaping filter, FTN signaling achieves a higher capacity than Nyquist signaling owing to the full exploitation of the excess bandwidth [7], [8]. As shown in the previous FTN studies [4]- [6], the concept of FTN signaling is applicable to a variety of communication scenarios, such as optical communications [9], visible light communications [10], and digital video broadcast [11], in addition to typical microwave wireless communications. Similar to the above-mentioned single-carrier FTN signaling, the concept of multicarrier FTN (MFTN) signaling, which non-orthogonally packs information symbols in the time and/or frequency domain, has been studied [12]- [17].…”

Section: Introductionmentioning

confidence: 99%

Reduced-Complexity FFT-Spread Multicarrier Faster-Than-Nyquist Signaling in Frequency-Selective Fading Channel

Ishihara

Sugiura

2022

IEEE Open J. Commun. Soc.

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In this paper, we propose novel reduced-complexity fast Fourier transform (FFT)-spread multicarrier faster-than-Nyquist (MFTN) signaling with power allocation for a frequency-selective fading channel. The information rate of the proposed MFTN signaling is derived by relying on the circulant approximation of the FTN-specific intersymbol interference matrix and noise covariance matrix. This allows us to constitute efficient calculations of precoding and weighting matrices. The power allocation coefficients are optimized such that the approximated information rate is maximized. Our simulation results demonstrate that the proposed scheme with power allocation achieves the bit error ratio (BER) performance close to the conventional eigenvalue-decomposition (EVD)-precoded FTN signaling counterpart that is optimal in terms of an achievable information rate while significantly reducing the computational complexity as low as the order of O(N log N). While the proposed scheme exhibits a high peak-to-average-power ratio similar to the conventional EVD-precoded counterpart due to the effects of FFT-based precoding, it achieves better BER performance than the conventional open-loop single-carrier FTN signaling scheme and the Nyquist signaling scheme, employing the same root-raised cosine shaping filter. It is also confirmed that the proposed MFTN signaling scheme does not suffer from any significant bandwidth broadening.

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“…Academic research shows that Precoding techniques in SAT-COM potentially allow more efficient spectral utilisation and substantially higher service availability [16][17][18]. To enable the efficient utilisation of satellite transponders, multiple carriers have to be relayed through a single HPA.…”

Section: Introductionmentioning

confidence: 99%

Hardware precoding demonstration in multibeam UHTS communications under realistic payload characteristics

Duncán

Querol

Maturo

et al. 2021

Advances in Communications Satellite Systems: Proceedings of the 37th International Communications Satellite Systems Conference

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In this paper, we present a new hardware test-bed to demonstrate closed-loop precoded communications for interference mitigation in multi-beam ultra high throughput satellite systems under realistic payload and channel impairments. We build the test-bed to demonstrate a real-time channel aided precoded transmission under realistic conditions such as the power constraints and satellitepayload non-linearities. We develop a scalable architecture of an SDR platform with the DVB-S2X piloting. The SDR platform consists of two parts: analog-to-digital (ADC) and digital-to-analog (DAC) converters preceded by radio frequency (RF) front end and Field-Programmable Gate Array (FPGA) backend. The former introduces realistic impairments in the transmission chain such as carrier frequency and phase misalignments, quantization noise of multichannel ADC and DAC and non-linearities of RF components. It allows evaluating the performance of the precoded transmission in a more realistic environment rather than using only numerical simulations. We benchmark the performance of the communication standard in realistic channel scenarios, evaluate received signal SNR, and measure the actual channel throughput using LDPC codes.

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Non-Linearized Amplifier and Advanced Mitigation Techniques: DVB-S2X Spectral Efficiency Improvement

Cited by 8 publications

References 18 publications

The Evolution of Faster-Than-Nyquist Signaling

The Evolution of Faster-Than-Nyquist Signaling

Reduced-Complexity FFT-Spread Multicarrier Faster-Than-Nyquist Signaling in Frequency-Selective Fading Channel

Hardware precoding demonstration in multibeam UHTS communications under realistic payload characteristics

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