The SRICOM probabilistic model of communication system performance. A user's manual for engineers, applications programmers and systems programmers
Abstract
SRI International developed a communication system performance model, SRICOM, which predicts the probability of a successful communication for a VHF or UHF radio system operating over irregular terrain in the presence of man-made non-Gaussian environmental radio noise. The model can be used for groundwave predictions on frequencies down to 1 MHz when noise from lightning is negligible, but the accuracy is reduced below 20 MHz. Also, the model can be used on frequencies as high as 20 GHz. All of the radio system, propagation, and noise parameters are treated as random variables except frequency, path length, and the antenna heights. The model computes the probability that a user-specified required signal-to-noise ratio is either met or exceeded as a function of any of the variables (e.g., communications range, antenna height). The model can loop back on the following variables: path length, frequency, receiving antenna height, transmitting antenna height, terrain roughness (interdecile range), and the percent of nearby locations where communications must be achieved in the presence of Rayleigh fading.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- May 1982
- Bibcode:
- 1982STIN...8318995H
- Keywords:
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- Computer Programs;
- Mathematical Models;
- Performance Prediction;
- Radio Communication;
- Ultrahigh Frequencies;
- User Manuals (Computer Programs);
- Very High Frequencies;
- Computerized Simulation;
- Prediction Analysis Techniques;
- Radio Transmission;
- Signal To Noise Ratios;
- Telecommunication;
- Communications and Radar