Higher order spectral analysis of nonlinear behavior in /spl Sigma/-/spl Delta/ modulator

Higher order spectral properties of /spl Sigma/-/spl Delta/ sequences are studied. For this purpose a first-order single stage /spl Sigma/-/spl Delta/ modulator is considered having as input a pure sinusoid. The nonlinear behavior of the /spl Sigma/-/spl Delta/ modulator is examined by means of the...

Full description

Saved in:
Bibliographic Details
Main Authors: Dokas, I., Tsagaris, V., Anastassopoulos, V.
Format: Conference Proceeding
Language:English
Subjects:
Delta modulation
Flip-flops
Frequency
Laboratories
Phase noise
Physics
Probability density function
Quantization
Spectral analysis
Transfer functions
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Higher order spectral properties of /spl Sigma/-/spl Delta/ sequences are studied. For this purpose a first-order single stage /spl Sigma/-/spl Delta/ modulator is considered having as input a pure sinusoid. The nonlinear behavior of the /spl Sigma/-/spl Delta/ modulator is examined by means of the bispectrum and the bicoherence. These functions reveal the statistical properties of the quantization noise, its dependence on the signal as well as the phase coupling between the signal and the noise. The quantizer and the integrator of the /spl Sigma/-/spl Delta/ modulator have been studied, using different functions, to simulate the deviations from the ideal behavior.
DOI:10.1109/ICDSP.2002.1028270