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

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE