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TAG: DVB-T

Digital Video Broadcasting – Terrestrial is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television.

http://www.crit.rai.it/eletel/2002-1/21-4.pdf

Projects with this TAG (6)

Active project

Mitigation techniques of the interference generated in TV distribution installations by 4G/5G signals in the 700 and 800 MHz bands

The activation in the UHF band of 4G/5G Base Stations can have in some areas an impact on TV reception, especially in case of community antenna installations. The adoption of proper interference mitigation techniques, such as the insertion of specifically designed filters at the head-end of the distribution network, allows to mimimise the effects in most situations.

Completed project

Assessment of the interference generated by the LTE signal on the head-end amplifiers of the TV reception systems

The presence of 800 MHz LTE signals within the UHF band traditionally used to distribute television signals may in some cases cause interference problems.

Active project

SFN Scope: an innovative analysis system for DVB-T SFN signals

Created and patented by Rai-CRIT, SFN-Scope can analyze SFN DVB-T signal received in the service area, and identify the individual components of the signals emitted from transmitters in service to the area, with their levels and delays. SFN-Scope thus makes now possible to simplify the signal quality control operated by RaiWay teams, and get actual feedback for level/delay measurment that until now were only available in a “aggregate” form by ordinary instruments.

Completed project

Laboratory evaluation of the Demetra system for the distribution of time / frequency references via geostationary satellite

In October 2016, at the Laboratory of Rai CRIT, it was carried out a series of tests on the demonstrator for time synchronization and frequency alternative to GNSS (Global Navigation Satellite System), developed by Antares S.c.ar.l under the European Demeter project, in collaboration with INRIM.
The tests have allowed us to evaluate the behavior of the developed system, especially in reference to the specific needs for synchronization of a network of DTT transmitters in single frequency (SFN).

Completed project

DVB-T2: single frequency network in Aosta Valley

The  Research Center in co-operation with Rai Way has launched in Aosta Valley on UHF channel 53 a second  DVB-T2 transmitter located in Salirod-Saint Vincent that, along with the transmitter Gerdaz-Aosta, installed in 2012, allowed to set up a DVB-T2 a small regional single frequency network test bed. This field trial has allowed us to experience the typical issues associated with a SFN: synchronization of transmitters, assessment of the areas of overlapping coverage, delays inserted to avoid static interference zones etc

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