Modulation, coding, and synchronization for mobile and very small satellite terminals, as part of the updated DVB‐S2 standard

SUMMARY DVB-S2X is the cornerstone for satellite communication standards forming the state-of-the-art of broadband satellite waveforms. In this paper we propose new application scenarios and advanced techniques, including a reference design implementing superframing, predistortion, a robust synchronization chain, and a plugand-play channel interleaver. We demonstrate by means of software simulations and hardware tests that the DVB-S2X can be a common technology enabler for land-mobile, aeronautical, and maritime satellite scenarios in addition to the more traditional VSAT scenario, even in very challenging conditions (e.g., very low SNR).

Section: System Designmentioning

confidence: 99%

Enhancing mobile services with DVB‐S2X superframing

Mazzali

Boumard

Kinnunen³

et al. 2018

“…Moreover, 8APSK, 64APSK, 128APSK and 256APSK constellations are introduced in addition to the ones of DVB‐S2, namely, QPSK, 8PSK, 16APSK, 32APSK. π/2‐BPSK is also available for VL‐SNR modes, the two lowest MODCODs further spread by a factor of 2 . This allows to enlarge the offered range of spectral efficiencies and SNRs.…”

Section: Modifications To the Physical Layermentioning

confidence: 99%

“…This has enabled the definition of more MODCOD schemes, allowing a finer SNR granularity as well as the introduction of additional MODCOD modes optimised for linear channels. The extended PL‐Header also offers improved error‐correction capabilities for VL‐SNR operation down to SNR levels as low as −10 dB and efficiently enables the transmission of VL‐SNR frames mixed with regular frames, so that a regular terminal can skip VL‐SNR frames with no disruption of frame synchronisation . Interoperability with legacy DVB‐S2 receivers in VCM modes is also guaranteed by modifying the length of LDPC codes so that the frame size of the VL‐SNR MODCODs is the same as either a QPSK or 16APSK‐modulated DVB‐S2 MODCOD with pilots.…”

Section: Modifications To the Physical Layermentioning

confidence: 99%

See 1 more Smart Citation

DVB‐S2X: extending DVB‐S2 flexibility for core markets and new applications

Morello

Mignone

2015

Digital Video Broadcasting-Satellite-Second Generation (DVB-S2) has been specified about 10 years ago, with a strong focus on Direct-to-Home, but interactive broadband applications (forward link), digital satellite news gathering and other professional links such as internet trunking were included. Since then, new requirements have come up, including extended efficiency and flexibility in the core applications of DVB-S2, with specific focus on ultra-high-definition television delivery to the home, using High Efficiency Video Coding, the new video coding technique jointly developed by ITU and MPEG, and new ones for emerging markets. DVB-S2X provides the necessary technical specifications for covering traditional DVB-S2 use cases and new ones for operating at very low signal-to-noise ratio down to À10 dB, such as mobile services for business jets, fast trains and boats, and low aperture terminals for journalists. This paper and the others in this special issue describe the details of the standard and its performance in the various application scenarios.

“…The novel VL‐SNR frames for use in noisy environments are described in . This paper provides a high‐level discussion on several of the most important aspects pertaining to the new VL‐SNR modulation and coding modes that offer better support for mobile and very small terminal applications.…”

Section: The Special Issuementioning

confidence: 99%

DVB‐S2X: the new extensions to the second generation DVB satellite standard DVB‐S2

Morello

Mignone

2015

BACKGROUNDIn September 1993, the Digital Video Broadcasting (DVB) project was launched, with the purpose of promoting the switchover from analogue to digital television (TV) broadcasting. It was a private, market-driven association, including all the main actors in digital TV such as broadcasters, network operators, manufacturers and regulators.Thanks to the achievements in the field of digital VLSI technology, both in the transmission and in the source coding areas, the first milestone of the DVB project was the specification of DVB-S. This was DVB's digital, multi-programme, TV system for satellite broadcasting that together with the adoption of MPEG2, introduced satellite direct-to-home (DTH) digital TV.With the worldwide success of this system, it became clear that it could also be suitable for digital satellite news gathering (DSNG) applications, with significant advantages in cost, performance and flexibility over the previous systems. In the summer of 1997, the DVB Project decided to start the development of a new specification for DSNG, based on the DVB-S system but with a number of new features added to cover the commercial and operational requirements of contribution applications. At the same time, DVB-S became the basis of the so called 'DVB family', on which the first generation digital standards for cable (DVB-C) and terrestrial (DVB-T) broadcasting were built.In 2003, 10 years after the standardization of DVB-S, DVB-S2 [1] was the first physical layer system of a new generation of digital standards to be developed in the DVB family. It set the benchmark for technical excellence, drove the design concepts for terrestrial and cable applications and along with MPEG4, led the way for introduction of high-definition TV services. However, DVB-S2 was no longer only a system for DTH broadcasting, but one for interactivity (i.e. internet access) and professional services (e.g. TV contribution links and DSNG) as well. To be able to cover all the application areas, while still keeping the single-chip decoder at reasonable complexity levels, DVB-S2 was structured as a toolkit, thus enabling the use of mass market products for professional or niche applications.In 2013, 10 years after the development of DVB-S2, following a request by the Commercial and Technical Modules, the DVB-S2 group started to analyse a further evolution of satellite technologies to enhance performance in the core markets (DTH, contribution, Very Small Aperture Terminal (VSAT) and DSNG) and to increase the range of applications of the standard to cover emerging markets such as mobile (air, sea and rail) or professional applications. DVB-S2X: THE DVB-S2 EXTENSIONSThe DVB-S2X [2] is an extension of the DVB-S2 specification that provides additional technologies and features for the core applications of DVB-S2 including DTH, contribution, VSAT and DSNG. The specification also provides an extended operational range to cover emerging markets such as mobile applications.