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AWE
Communications refines their planning tool for
S-DMB considering the satellite as well as the terrestrial repeater
segment in the framework of the ORTIGIA project in collaboration with
their partners and partly funded by ESA.
The S-DMB radio network planning tool allows the investigation of the
S-DMB performance in terms of coverage and system margin for
different satellite and terrestrial repeater configurations within
various environments (rural,
urban,
and indoor).
Based on the accurate prediction of the satellite and
repeater (gap-filler) links in terms of path loss delay profiles by
using deterministic ray-optical
wave propagation models the defined S-DMB network is evaluated. The
calculation of the different path loss delay profiles forms the basis
for the S-DMB system simulation. Besides the refinement of the S-DMB
radio planning tool the contribution is twofold:
Radio Planning of Erlangen Trials:
For the planning of
the trials in the Erlangen area coverage predictions of the Artemis
satellite and the foreseen repeaters have been computed by using:
The following figures
show the considered database of the Erlangen area and a coverage
prediction for the Fraunhofer repeater
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Database
of considered Erlangen area
(incl.
3D building and topographical data)
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Prediction
of path loss
for
the Fraunhofer repeater
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S-DMB Gap-Filler
Density and Planning Figures:
Several technologies
for providing mobile broadcast services are currently emerging. Besides
terrestrial-only architectures as DVB-H the hybrid satellite &
terrestrial system approach of S-DMB offers an interesting alternative
in terms of coverage and cost-efficiency. As the overall system costs
are significantly influenced by the amount of gap-fillers (repeaters)
which is required to reach the coverage target the corresponding
figures are of prime interest at the current level of system
definition. AWE works on the estimation of the required gap-filler
density for urban (and suburban scenarios) in typical cases and the
derivation of gap-filler figures on a country wide basis.
Based on the derivation of the required gap-filler density country-wide
figures have been estimated based on the evaluation of individual
data (area size and population) for the main cities with more than
100.000 inhabitants. These investigations have been carried out for
some major European countries:
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