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A Radiometer Employing Frequency‐Domain Coding
Author(s) -
Aitken G. J. M.,
Mills R. J.
Publication year - 1970
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs005i003p00535
Subject(s) - radiometer , remote sensing , noise (video) , computer science , signal (programming language) , environmental science , physics , optics , geology , artificial intelligence , image (mathematics) , programming language
A radiometer has been developed in which the spectrum of the noise‐like signal is shaped (spectral coding) so that it can be distinguished from the receiver noise by a simple correlation process. This radiometer has a small‐signal sensitivity comparable to that of the Dicke (temporally coded) system and an output insensitive to variations in the system gain or front‐end temperature. An advantage of the system is the simplicity of the required hardware, leading to the possibility of high reliability. A practical radiometer was constructed to demonstrate the technique.