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Accession Number:
AD0481738
Title:
HF COMMUNICATION EFFECTS: PREDICTION OF PROPAGATION PARAMETERS AFFECTING ERROR RATE.
Corporate Author:
STANFORD RESEARCH INST MENLO PARK CA
Report Date:
1965-08-01
Abstract:
This report discusses a proposed method of predicting error rate for HF communication systems. The method is based on the long-term HF propagation prediction methods of CRPL and USARPA, and on estimates of the channel-scattering function. This function provides a basis for determining the time-and frequency-selective fading effects caused by variations in the propagation medium. Performance predictions have previously been made by computing only the SN of the received signal. It is recommended that time spread multipath, Doppler frequency spread, and diversity correlation also be considered. The sources of error in predicting field strength are investigated, and measurements on two paths for one year are compared with predictions. No improvement in the method of predicting field strength can be recommended. Emphasis is given to the problem of predicting all significant modes of propagation, including those associated with sporadic E. High-latitude effects are also treated briefly. Author
Descriptive Note:
Final rept.,
Pages:
0049
Contract Number:
DA-36-039-SC-87197
File Size:
0.00MB
