MULTIPATH TRANSMISSION FROM AN INACCESSIBLE SOURCE,
Abstract
The problem of obtaining reliable reception from an inaccessible transmitter under multipath propagation conditions is considered in terms of the following two problems: The derivation of a filter for the elimination or reduction of multipath effects; and, the estimation of the multipath channel parameters necessary for the implementation of this filter from a knowledge of the received signal alone. This report assumes that the more important phenomena associated with ionospheric propagation may be described in terms of a simple model of the transmission medium. This model serves as a starting point for the derivation of a filter, the purpose of which is the elimination of waveform distortion introduced by the medium. The autocorrelation function of the received signal is used to estimate the filter parameters corresponding to the prevailing channel structure. The operation of the filter in both time and frequency domains is described and some limiting features of the method of filter parameter estimation are discussed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1964
- Accession Number
- AD0605680
Entities
People
- F. C. Ogg Jr.
- P. J. Butterly
Organizations
- Johns Hopkins University