Comparisons of observed propagation loss with predictions from multiple knife-edge attenuation
Abstract
Comparisons of theoretical attenuation based on multiple knife edge diffraction with measured values of median propagation loss are presented for a number of different propagation paths. In general the knife edge predictions tend to overestimate received signal strength with most of the differences between predicted and observed values lying in the range -12 to +7 dB. Use of a computerized topographic data base to generate path profiles for the knife edge attenuation result in predicted/observed loss differences of about the same magnitude, although spurious results sometimes arise.
- Publication:
-
Inst. for Telecommunication Sciences. National Telecommunications and Information Administration
- Pub Date:
- October 1982
- Bibcode:
- 1982itsn.rept.....V
- Keywords:
-
- Radio Waves;
- Transmission Loss;
- Wave Attenuation;
- Wave Propagation;
- Diffraction Paths;
- Topography;
- Communications and Radar