Prediction of Equivalent System Temperature: A Computer Methodology

Award Information
Agency: Department of Commerce
Branch: N/A
Contract: 201
Agency Tracking Number: 30875
Amount: $200,000.00
Phase: Phase II
Program: SBIR
Awards Year: 1996
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Applied Data Trends, Inc.
P.O. Box 4445, Huntsville, AL, 35815
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Derrick T. Copeland
 Chief Executive Officer
 () -
Business Contact
Phone: () -
Research Institution
There is a global trend towards utilization of satellite communications for information services. Equivalent system temperature, Ts, is a significant parameter in quantifying the antenna system/link performance, because it represents the noise power spectral density in antenna system figures-of-merit, such as receiver gain/system temperature (G/T), and end-to-end Signal to Noise Ratio (SNR). Unfortunately, Ts is dependent on many parameters. This presents a significant problem in predicting system performance in the operational environment (indoors - the antenna sees roughly the ambient temperature, outdoors - the antenna sees many other noise sources that may vary significantly over time). An innovative computer methodology is proposed that uses a novel application of noise theory and an integration of new and existing algorithms to estimate a statistical "worst case" in the operating environment based upon a desired availability. The specific objectives of the Phase I effort are to: develop a method to measure the composite system noise fugure; develop a statistical method for predicting system ambient operating temperature; develop a method to statistically estimate equivalent antenna temperature; and select supporting computer algorithms. The technical approach is to resolve each objective by addressing the individual uncertainties and unknowns of the methodology.

* information listed above is at the time of submission.

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