A system to measure LOS atmospheric transmittance at 19 GHz
Abstract
The principles of a wideband test system for measuring the complex transmittance of a line-of-sight (LOS) microwave radio link subject to fading and multipath are discussed. The technique which uses cross-correlation between pseudo-binary random sequences falls into the realm of spread spectrum techniques. The system described is designed cover 1 GHz bandwidth at 19 GHz and has the objective of measuring both co-polar and cross-polar transmittance thus generating the complex transmittance matrix. Computer simulations and preliminary experimental results are presented together with a brief initial comparison with other systems.
- Publication:
-
In AGARD Characteristics of the Lower Atmosphere Influencing Radio Wave Propagation 16 p (SEE N84-24943 15-32
- Pub Date:
- February 1984
- Bibcode:
- 1984clai.agar.....V
- Keywords:
-
- Atmospheric Attenuation;
- Electromagnetic Measurement;
- Line Of Sight Communication;
- Microwave Transmission;
- Transmittance;
- Computerized Simulation;
- Cross Correlation;
- Cross Polarization;
- Multipath Transmission;
- Signal Fading;
- Spread Spectrum Transmission;
- Transfer Functions;
- Communications and Radar