*     Radio Engineering Services

 

 

This Website

 

Home

 

HERALD Sw

 

Video Courses

 

Consulting Services

 

Demo & Presentation Sw

 

 

Contact

 

Tell a Friend

­­­­­­­­­­­­­­­­­­

_­­­___________________

 

Our Tips

 

View HERALD Videoclip

 

Download Free E-Book on “Point-to-Point Radio Link Engineering”

 

_­­­___________________

 

Useful Links

 

International Telecommunication Union (ITU)

 

ITU Bookshop

 

ETSI

 

European Radiocommunication Organization (ERO)

 

Federal Communications Commission

 

SRTM Maps (NASA)

1arcsec   3arcsec

 

SRTM Maps (ViewFinder)

_­­­___________________

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

If you find

this Course useful

please consider . . .

 

  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.

 

 

 

 

­­­­­­­­­­­­­­­­­­­­­­­­_______________________

 

Copyright © Luigi Moreno 1998-2022, All rights reserved

E-mail : info(at)radioengineering.it