Spherical Propagation Models for Multipath-Propagation Predictions
Abstract
Multipath fading leads to a limitation in the availability and/or reliability of microwave links. To study the propagation mechanism under fading conditions propagation models, based on ray theory, above a spherical earth have been developed and compared to the well-known planar propagation model above a 'flattened earth'. The reasons for studying spherical propagation models are (a) to avoid the limitation of small elevation angles in planar propagation models, (b) to investigate the computed and measured path delay on the microwave line of sight links, and (c) to set up an analytical approach for the spherical propagation model without numerical difficulties and computing-time intensive procedures. In this paper computational results of the models are shown, including an accuracy analysis, and the use of spherical propagation models is illustrated for surface duct layers above water.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1984
- Accession Number
- ADP003893
Entities
People
- L. P. Ligthart
Organizations
- Delft University of Technology