Accession Number : ADA298868

Title :   Mathematical Modelling of Errors on a Satellite Channel: Theory and Practice.

Descriptive Note : Rept. for Jan 92-Dec 94,

Corporate Author : ROME LAB GRIFFISS AFB NY

Personal Author(s) : Rosen, J. D.

PDF Url : ADA298868

Report Date : JUN 1995

Pagination or Media Count : 31

Abstract : This report details a cooperative RL/AFOSR project to provide a laboratory environment for test and evaluation of equipments/protocols that are or will be used in DOD/Federal/Commercial networks utilizing disadvantaged' communications links with higher error rates than copper or fiber. One way is to utilize Error Injector Units (EIU) previously developed under another Rome Lab Effort: "Markov Models for Data Communications." The EIUs are inserted between communication networking equipments to emulate the errors seen over these links, giving the user an idea of actual equipment/protocol performance. Accurate, reliable, transition matrices must be generated for the Markov models used in the ElUs, based on bit error sequences collected by observing live, over-the-air channels during operation. The report focusses on identifying metrics to evaluate the fidelity of a suggested model and proposing methods of generating models which attempt to optimize one or more of these metrics. A procedure is outlined for the use of these models and metrics in a testing environment. (AN)

Descriptors :   *COMMUNICATIONS NETWORKS, *SATELLITE COMMUNICATIONS, MATHEMATICAL MODELS, COMMERCE, HIGH RATE, INFORMATION TRANSFER, DATA TRANSMISSION SYSTEMS, ASYNCHRONOUS SYSTEMS, MAXIMUM LIKELIHOOD ESTIMATION, MATRICES(MATHEMATICS), AUTOCORRELATION, ERRORS, DATA LINKS, DIGITAL COMMUNICATIONS, COMMUNICATION SATELLITES, MARKOV PROCESSES, MULTICHANNEL COMMUNICATIONS.

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE