IMPROVEMENT OF SPECTRAL PROPERTIES OF QUANTIZATION NOISE BY MULTIRESOLUTION QUANTIZATION
Abstract
In the area of electromagnetic interference (EMI) time-domain EMI measurement systems significantly reduce measurement time. As EMI measurements require high dynamic range or signal-to-noise ratio and wide frequency range, a multiresolution structure of available fast sampling analog-to digital converters (ADC) is used inside such systems. The combination of several ADCs allows to increase overall dynamic range of measuring device. In the paper spectral properties of the quantization noise of system with two ADCs are analyzed by simulations as well as experimentally for harmonic input signal. Multiresolution measurements were realized by two channels of data acquisition card and PC postprocessing. The noise suppression achieved by experiments is presented.
Event details
- Event
- IWADC 2011
- Technical Committee
- TC4
- Place
- Orvieto, ITALY
- Time
- 30 June 2011 - 1 July 2011
- Website
- http://www.iwadc2011.diei.unipg.it/Sito/IWADC2011.html