The present document applies to Earth Stations located on board Vehicles, which have the following characteristics.
In-vehicle
Services
Interface
Stabilization
& Tracking
mechanism
Antenna
Enclosure / Radome
Control and
Monitoring
Function
Antenna
Controller
Modem
External mounted
equipment (EME)
Internally mounted
equipment (IME)
Externally or internally
mounted equipment
LNA
BDC
HPA BUC
Radio
Antenna
Control
Facility
Interface
Figure 1: VMES System Overview
• The VMES may transmit and receive data when the vehicle is in motion and also when the vehicle is
stationary.
• The VMES operates on wheeled or tracked vehicles and, therefore, may be subject to occasional disturbances
and interruptions in the satellite link.
• The VMES is operating as part of a satellite network (e.g. star, mesh or point-to-point) used for the distribution
and/or exchange of information.
• The VMES is comprised of all the equipment, electrical and mechanical, from the antenna itself to the
interface with other communications equipment on a vehicle (usually referred to as the terrestrial interface).
• The VMES transmits on single carrier in the frequency range 14,00 GHz to 14,50 GHz, which is a band
allocated to the Fixed Satellite Services (FSS) (Earth-to-space) among other services. However, operation of
the VMES is intended to be restricted to the lower half of the band in and near those countries that have
allocated Fixed Service (FS) to the upper half. Local regulation may permit operation in the upper half of the
band.
NOTE 1: For the purposes of the present specification, OFDM modulation is considered as a single carrier.
• The VMES receives in one or more frequencies within the range from 10,70 GHz to 12,75 GHz in bands
allocated to the Fixed Satellite Services (FSS) (space-to-Earth) or the Broadcast Satellite Service (BSS)
(space-to-Earth), depending on the ITU Region where the VMES is located.
• The VMES uses linear or circular polarization.
• The VMES is designed to operate through a geostationary satellite (or a cluster of co-located geostationary
satellites) that is at least 3° away from any other geostationary satellite operating in the same frequencies and
over the same coverage area.
NOTE 2: Satellites may be spaced closer than 3°. In such cases, the satellite operator will inform the VMES client
of the requirements of the system coordination agreements.
• The VMES transmits at elevations greater than or equal to 7° relative to the local horizon.
• The VMES is designed for unattended operation.
• The VMES is designed for both mobile and stationary operation. In the case of stationary operation, the
VMES should not be accessible to the general public and operated safely.
• The VMES is controlled and monitored by an Antenna Control Facility (ACF). This function may be
performed centrally (e.g. for a network of VMESs with a central hub) or it could be performed within the
VMES for autonomous control. The ACF is outside the scope of the present document.
The present document applies to the VMES with its ancillary equipment and its various telecommunication ports, and
when operated within the boundary limits of the operational environmental profile as declared by the applicant and
when installed as required by the applicant's declaration or in the user documentation.
The present document is intended to cover the provisions of Directive 2014/53/EU [9] (RE Directive) article 3.2, which states that "… radio equipment shall be so constructed that it both effectively uses and supports the efficient use of radio spectrumin order to avoid harmful interference".
NOTE 3: Operational requirements are defined by national administrations and by relevant ECC Decisions.
In addition to the present document, other ENs that specify technical requirements in respect of essential requirements under other parts of article 3 of the Directive 2014/53/EU [9] (RE Directive) may apply to equipment within the scope of the present document.
NOTE 4: A list of such ENs is included on the web site http://www.newapproach.org/.
Required fields are indicated with *
