Accession Number:
AD0256675
Title:
INFORMATION TRANSMISSION IN RF SYSTEMS WITH MULTI-PATH PROPAGATION
Descriptive Note:
Corporate Author:
WASHINGTON UNIV SEATTLE
Personal Author(s):
Report Date:
1960-12-01
Pagination or Media Count:
1.0
Abstract:
Multi-path propagation is considered as a f nction of the differences in propagation times for the several paths. The percent of time that a transmitted signal of constant a plitude will exceed a threshold level is determined for systems with small propagation-time differences. The effect of the antenna pattern on this statistic is considered. In addition, the envelope auto-correlation function for the received signal is determined as a function of the phase stability of the various signals making up the received signal. For systems having large but fixed propagation-time differences between the received components, and with thermal noise at the receiver, the information capacities of the systems are determined to lie within ce tain limits. A means for attaining the upper limit is determined. Numerical results are obtai ed for systems where there are only two propagation paths. Author