SOURCEFORGE » RALF » 2014 ACM testing using channel emulation

Draft ETSI EN 302 307-1 V1.4.1(2014-07)
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Digital Video Broadcasting (DVB);
Second generation framing structure, channel coding and
modulation systems for Broadcasting, Interactive Services,
News Gathering and other broa
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Draft ETSI EN 302 307-2 V1.1.1 (2014-10)
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Digitql Video Broadcasting (DVB);
Second generation framing structure, channel coding and modulation systems for Broadcasting, Interactive Services, News Gathering and other broadband satellite applications;
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Authors:
Huyen Chi Bui, Laurent Franck.

Abstract:
This contribution is about the use of software-
defined radio (SDR) for channel emulation. Based on NI USRP
devices and the LabVIEW programming environment, we devised
an affordable RF channel emulator for geostationary satellite
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ETSI TR 102 376 V1.1.1 (2005-02)
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Digital Video Broadcasting (DVB);
User guidelines for the second generation system for
Broadcasting, Interactive Services, News Gathering and other
broadband satellite applications (DVB-S2)....

User and reference manuals for the EL470 modems.

Abstract:
Point-to-point multi-beam satellite systems based on the DVB-S standard are currently designed for link closure in the worst-case prop- agation and location conditions. The DVB-S standard, conceived for broadcasting applica- tions, considers a fixed coding rate and modula- tion format that are selected according to the assumed coverage and availability requirements. This approach implies the occurrence of high margins in the majority of the cases, when inter- ference and propagation conditions allow for higher signal-to-noise-plus-interference ratio. The adaptive coding and modulation (ACM) introduction in the new DVB-S2 standard for the interactive service profile opens up a number of appealing opportunities for the design and development of satellite broadband networks. In this article we show how the ACM introduction in the satellite downlink enables greatly enhanced system performance but also has a profound impact on the way the system and some of the key system components are designed....

This paper presents the results of in-depth validation of a DVB-S2 system with ACM, using a laboratory demonstrator developed under a European Space Agency Artes 5 contract “ACM Modem”. The reference scenario used to define the test cases consists of a multi-beam Ka-band satellite system, representative of future systems to provide broadband access by satellite at a low cost and with high service availability, made possible with the DVB-S2 standard. The demonstration platform is based on a commercial gateway and terminal, which modulator and demodulator have been adapted to include DVB-S2 and ACM functionalities and detailed test points, a two-way satellite channel emulator, IP traffic generators and analysers and a control & monitoring station for test automation....