Title :
Noise-aided processing: revisiting ditheringin a ΣΔ quantizer
Author :
Zozor, Steeve ; Amblard, Pierre-Olivier
Author_Institution :
Groupe Non-lineaire, Lab. des Images et des Signaux, St. Martin d´´Heres, France
Abstract :
In this paper, we show that a particular ΣΔ quantizer, which is a strongly nonlinear dynamical system, can provide noise-enhanced processing effects in some sense. In particular, we will show that quantizing a sine, which means adding a small amount of noise in the input, can improve the quantization process. In particular, the output local signal-to-noise ratio (SNR) exhibits a maximum when plotted against the noise amplitude.
Keywords :
nonlinear dynamical systems; quantisation (signal); signal processing; ΣΔ quantizer; SNR; noise-aided processing; noise-enhanced processing; nonlinear dynamical systems; revisiting dithering; sigma-delta quantization; signal-to-noise ratio; Detectors; Information processing; Noise level; Nonlinear dynamical systems; Quantization; Signal processing; Signal to noise ratio; Simulated annealing; Stochastic resonance; Switches; Local signal-to-noise ratio; noise-enhanced processing; sigma-delta quantization;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2005.851119
