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Video
Courses - Point-to-Point Radio Link Design
COURSE LIST
(click  below to show Course Content;  to show
summary 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.
Session 1 :
Brief History, Course Motivation
Why this Training (Video Lesson) Complementary Notes (pdf)
Preliminary Test
Session 2 :
Basic Radio Link Equation
How EM Waves propagate in Free
Space ((Video Lesson)
Complementary Notes (pdf)
Preliminary Test
Session 3 :
Link Budget & Fade Margin
From Free Space to Terrestrial
Radio Links ((Video Lesson)
Complementary Notes (pdf)
Preliminary Test
Design Exercise (HERALD Lab)
Radio
Hop Configuration, Link Budget (Video Demo)
Final Test
Get Your Score
Certificate Form
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.
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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