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Video
Courses - Point-to-Point Radio Link Design
COURSE LIST
(click  below to show Course Content;  to show
titles only)
Introduction & Basics
Motivation of this Training Program is briefly presented. Then, the
Free Space Radio Link Equation is presented. Moving to terrestrial radio
links, we discuss Link Budget and Fade Margin, which are the tools useful
to predict radio hop Outage Probability.
Path Analysis, Obstructions
The propagation path of a radio wave through the atmosphere is
discussed by introducing the k-factor concept. Possible deviations from
standard conditions are identified, as well as the minimum k-factor value.
Then the Fresnel ellipsoid is defined; partial obstructions of the
ellipsoid lead to the obstruction loss estimate. Finally, ITU-R recommended
Clearance Criteria are presented.
Multipath Fading
Refractivity conditions likely to produce multipath propagation
are first considered. Received signal impairments and multipath activity
statistics are described, introducing the multipath occurrence factor.
Multipath models are applied to outage prediction (narrow- and wide-band
systems). Finally, multipath countermeasures (adaptive equalization,
diversity) are considered.
Session 1 : Propagation
in Stratisfied Atmosphere
From Standard to Stratified
Atmosphere (Video Lesson)
Complementary Notes (pdf)
Preliminary Test
Session 2 : Multipath
Events and Impairments
What's happening during
Multipath Events (Video Lesson)
Complementary Notes (pdf)
Preliminary Test
Session 3 : Multipath
Outage and Countermeasures
How to predict and to limit
Multipath Outage (Video Lesson)
Complementary Notes (pdf)
Preliminary Test
Design Exercise (HERALD Lab)
Prediction of Multipath Outage
and Diversity Gain (Video Demo)
Final Test
Get Your Score
Certificate Form
Rain Attenuation
First, the interaction of an EM wave with molecules or
particles in the atmosphere is discussed. This leads to an estimate of rain
specific attenuation, as a function of rain intensity, signal frequency and
polarization. Worlwide statistical data on rain intensity are considered,
as required by the ITU-R rain model to predict rain unavailability, at
frequencies up to 90 GHz.
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_______________________
Copyright © Luigi Moreno 1998-2025, All rights
reserved
E-mail : info(at)radioengineering.it
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