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Complex cross correlators with three‐level quantization: Design tolerances
Author(s) -
D'Addario L. R.,
Thompson A. R.,
Schwab F. R.,
Granlund J.
Publication year - 1984
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/rs019i003p00931
Subject(s) - quantization (signal processing) , computer science , autocorrelator , algorithm , quadrature (astronomy) , mathematics , physics , statistics , autocorrelation , optics
Digital correlators have been analyzed in considerable detail for cases in which the components behave ideally. Here we consider the effects of the major deviations from ideal behavior which are encountered in practice. Attention is restricted to three‐level quantization, but the fairly general case of the complex cross correlator is studied. (The real autocorrelator, for example, is a special case of this.) The errors analyzed include quantization threshold errors, quantizer indecision regions, sampler timing skews, quadrature network errors, and numerical errors in algorithms for converting digital measurements to equivalent analog correlations.