SUMMARYFollowing the definition of commercial requirements in different satellite communication market segments, the satellite communications technical module of the Digital Video Broadcasting Project (DVB) took the mandate to develop the extension of the second generation DVB System for satellite broadcasting and unicasting (DVB-S2) standard in order to achieve higher efficiencies without introducing fundamental changes to the complexity and structure of DVB-S2.In this paper, we focus on a new powerful physical layer frame structure, known as Super-Frame (SF), which has been adopted as optional waveform container in Annex E of the recently approved DVB-S2 eXtension standard specifications. The main contribution of this paper is to provide the rationale, design choices, potential applications and performance gains of the SF structure with particular emphasis on the context of satellite broadband systems. In order to demonstrate the satisfaction of the stated requirements to the SF approach, analytical results of the SF performance are complemented by the performance results obtained from an end-toend testbed and prototype design of modulator and demodulator featuring the SF generation and detection capability. The prototype devices are able to operate at a wide range of signal-to-noise ratios and at high symbol rates.
The European Telecommunications Standards Institute (ETSI) is a non-profit organization that creates technical standards for different areas of telecommunications. The ETSI activity satellite digital radio (SDR) addresses networks where satellite transmission is used for broadcasting directly to mobile receivers and is complemented by terrestrial transmitters. ETSI standards allow implementing parts Of Such systems in an interoperable way. A standardized radio interface enables a mass market for consumer reception devices and Could become a regulatory requirement. ETSI, so far, has created standards for the physical layer of the radio interface. State-of-the-art technology for multiplexing, interleaving, modulation and coding is applied. The system is broken down into parts that are covered by separate standards, which allows combining with other existing or future specifications. The standards cover the direct satellite transmission and the complementary terrestrial transmission, with both their particular impairments and conditions. A sophisticated time interleaving allows one to overcome signal blockage in a way that increases the 'zapping time' only slightly. The physical layer standards can be combined with existing standards for audio/video coding and encapsulation, in particular from MPEG and DVB. ETSI is planning to create further standards for the SDR system. First networks that apply the SDR technology are expected in 2008
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