Fading and inter-modulation-noise statistics from a 14 GHz L.O.S. propagation experiment
Abstract
Statistics of fadings and IM-noise in the frequency band of 13.6 to 14.9 GHz from a 45 km L.O.S. propagation path are presented. The statistics cover the period July 1974 to July 1975. Both monthly and diurnal variations of the fading are given as well as the distribution of the fading durations. Separate statistics are made for multipath propagation and for precipitation attenuation. Distributions of the 1 minute mean and the 1 hour mean values of total noise power for the whole period, and for the worst month are presented. The monthly variation of these values are also presented. Based on the data it is concluded that this propagation path will satisfy the relevant part of the CCIR recommendation 395-1, concerning the transmission quality in the worst month - provided the antennas are protected against wet snow and the system uses some type of diversity to cope with multipath propagation.
- Publication:
-
Union Radio Scientifique Internationale, Open Symposium
- Pub Date:
- 1977
- Bibcode:
- 1977ursi.symp..453M
- Keywords:
-
- Atmospheric Attenuation;
- Intermodulation;
- Line Of Sight Communication;
- Microwave Transmission;
- Random Noise;
- Signal Fading;
- Diurnal Variations;
- Microwave Attenuation;
- Multipath Transmission;
- Precipitation (Meteorology);
- Reception Diversity;
- Signal Measurement;
- Statistical Distributions;
- Superhigh Frequencies;
- Communications and Radar