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Simulation program of nonlinearities applied to telecommunication systemsIn any satellite communication system, the problems of distorsion created by nonlinear devices or systems must be considered. The subject of this paper is the use of the Fast Fourier Transform (F.F.T.) in the prediction of the intermodulation performance of amplifiers, mixers, filters. A nonlinear memory-less model is chosen to simulate amplitude and phase nonlinearities of the device in the simulation program written in FORTRAN 4. The experimentally observed nonlinearity parameters of a low noise 3.7-4.2 GHz amplifier are related to the gain and phase coefficients of Fourier Service Series. The measured results are compared with those calculated from the simulation in the cases where the input signal is composed of two, three carriers and noise power density.
Document ID
19800011042
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Thomas, C. (NASA Headquarters Washington, DC United States)
Date Acquired
September 4, 2013
Publication Date
December 1, 1979
Subject Category
Communications And Radar
Report/Patent Number
CNES-NT-81
NASA-TM-75511
Accession Number
80N19320
Funding Number(s)
CONTRACT_GRANT: NASW-3198
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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