Advanced techniques for spectrally efficient DVB-S2X systems

Ugolini, Alessandro; Modenini, Andrea; Colavolpe, Giulio; Picchi, G.; Mignone, V.; Morello, A.

doi:10.1109/asms-spsc.2014.6934538

Cited by 10 publications

(13 citation statements)

References 20 publications

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“…where I 0 (·) is the modified Bessel function of the first kind and order zero. By combining (16) and (17) we have…”

Section: A Analysis For Single Transmittermentioning

confidence: 99%

“…We point out that FDM and Alamouti schemes perform singleuser operations, so they practically achieve their corresponding theoretical bounds with classical PSK/APSK constellations. Finally, we mention that we have attempted an optimization of the constellations, using the same algorithm described in [16], imposing that the constellations adopted by the two transmitters are identical. Optimization results suggest that PSKs are practically optimal in this case.…”

Section: Practical Constellations For Awgn Channel With Peak Powermentioning

confidence: 99%

“…Process φ(t) models the difference of phase between oscillators and their phase noise, and is considered perfectly known at the receiver. We employ the adaptive receiver proposed in [16], [17]: a sufficient statistic for detection is extracted by using oversampling at the output of a low pass filter [14], and a fractionally-spaced minimum mean square error (FS-MMSE) equalizer, working at twice the symbol rate, acts as adaptive filter followed by a multiuser detector. The adaptivity is accomplished by means of the least mean square or the recursive least square algorithms [18].…”

Section: Satellite Channelmentioning

confidence: 99%

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On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions

Modenini

Ugolini

Piemontese

et al. 2015

IEEE Trans. on Broadcast.

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We consider the use of multiple co-located satellites to improve the spectral efficiency of broadcast transmissions. In particular, we assume that two satellites transmit on overlapping geographical coverage areas, with overlapping frequencies. We first describe the theoretical framework based on network information theory and, in particular, on the theory for multiple access channels. The application to different scenarios will be then considered, including the bandlimited additive white Gaussian noise channel with average power constraint and different models for the nonlinear satellite channel. The comparison with the adoption of frequency division multiplexing and with the Alamouti space-time block coding is also provided. The main conclusion is that a strategy based on overlapped signals is the most convenient in the case of no power unbalance, although it requires the adoption of a multiuser detection strategy at the receiver.

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“…where I 0 (·) is the modified Bessel function of the first kind and order zero. By combining (16) and (17) we have…”

Section: A Analysis For Single Transmittermentioning

confidence: 99%

Section: Practical Constellations For Awgn Channel With Peak Powermentioning

confidence: 99%

Section: Satellite Channelmentioning

confidence: 99%

See 1 more Smart Citation

On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions

Modenini

Ugolini

Piemontese

et al. 2015

IEEE Trans. on Broadcast.

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“…The selected methodology for the evaluation of the achievable enhancements has involved the optimization of the transmission symbol rate given the satellite system constraints related to the available signal bandwidth, W, and the roll-off factor, α, of the pulse-shaping filter [6,7]. Therefore, this paper presents the DVB-S2X performance in terms of spectral efficiency that can be obtained by fixing a reference satellite bandwidth, W ref , and then by optimizing the transmission data rate in combination with the roll-off factor.…”

Section: Introductionmentioning

confidence: 99%

“…However, thanks to the advances in VLSI technology, today, lower roll-off values and more advanced detection algorithms can be easily implemented in the new DVB-S2X modems. In [6] and [7], the authors provided some guidelines to design more sophisticated receiver architectures to improve the system spectral efficiency along with better resilience against linear and nonlinear distortions. In particular, Cioni et al [6] recommend the adoption of a fractionally spaced equalizer [8] to better handle the increased distortions and interference arising when operating with high symbol rate values (e.g., greater than 31 Mbaud).…”

Section: Introductionmentioning

confidence: 99%

DVB‐S2X physical layer performance results over realistic channel models

Cioni

Ginesi

2015

Satell Commun Network

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SUMMARYThe second-generation satellite digital video broadcasting (DVB-S2) standard has been recently reviewed with the aim of improving its spectral efficiency over a wide range of signal-to-noise ratios (SNRs). In this paper, three typical satellite channel configurations have been presented, which are associated with the three main DVB-S2 core markets: direct-to-home (DTH) broadcasting, broadband services, and distribution/contribution/high-speed IP links. This work is focused on the physical layer performance analysis of the new DVB-S2 extensions (DVB-S2X) waveform under realistic satellite channel models. Particular emphasis has been devoted to the maximization of the spectral efficiency as a function of the transmission symbol rate and in combination with the rolloff factor of the pulse-shaping filter, in the presence of state-of-the-art modulation and demodulation techniques.

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Transmission parameters optimization and receiver architectures for DVB‐S2X systems

Cioni

Colavolpe

Mignone

et al. 2015

Satell Commun Network

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The second-generation specification of the digital video broadcasting for satellite (DVB-S2) was developed in 2003 with the aim of improving the existent broadcasting standard DVB-S. The main new features introduced by DVB-S2 included increased baud rates, higher cardinality constellations (up to 32 points), and more efficient binary codes. The extension to DVB-S2, approved in 2014 with the name DVB-S2X, together with continuous technological evolution, moves further steps in this direction, with the use of constellations with cardinality up to 256 points, improved granularity of modulation and coding schemes, and the possibility to increase the baud rate. In this scenario, it is important to be able to ascertain what is the best transceiver structure, starting from the choice of the shaping pulse and the baud rate of the transmitted signals and ending with the most promising receiver architectures, with the aim of maximizing the spectral efficiency. In this paper, we will discuss some of the aspects of this investigation, namely, the optimization of transmission parameters and the description of an efficient receiver. We will then assess the performance of the proposed scheme in comparison with a classical DVB-S2 architecture. Some synchronization aspects will also be discussed, to account for the impairments introduced by the channel.A detector taking into account a larger memory cannot achieve significant performance gains after the application of an equalizer, hence the choice of a symbol-by-symbol detector [3].

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Advanced techniques for spectrally efficient DVB-S2X systems

Cited by 10 publications

References 20 publications

On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions

On the Use of Multiple Satellites to Improve the Spectral Efficiency of Broadcast Transmissions

DVB‐S2X physical layer performance results over realistic channel models

Transmission parameters optimization and receiver architectures for DVB‐S2X systems

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