Statistical considerations of modified two bit sampling for astronomical correlators
AuthorDowd, Andrew Vernon, 1962-
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PublisherThe University of Arizona.
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AbstractWhen applied to radio astronomy instrumentation, practical limitations on circuitry restrict digital correlators to extremely coarse quantization. This paper examines non-linear effects of modified two-bit quantization on astronomical correlators. Equations are presented to correct quantization bias in estimates. The degradation due to quantization is given and plotted. The necessary tolerance in threshold levels is established to avoid systematic errors in power spectrum measurement. An alternative method of measuring power is derived that reduces parameter sensitivity.
Degree ProgramGraduate College
Electrical and Computer Engineering