Title :
Performance of stochastic and deterministic dithered quantizers
Author :
Carbone, Paolo ; Petri, Dario
Author_Institution :
DIEI, Perugia Univ., Italy
fDate :
4/1/2000 12:00:00 AM
Abstract :
In this paper, the authors discuss the use of deterministic and stochastic dither sequences in analog-to-digital conversion including data postprocessing. Properties of both types of dither signals are highlighted, and a performance comparison is carried out by considering residual bias and mean square error. It is concluded that superior performance can be attained by deterministic dither in terms of system resolution and accuracy, at the expense of worse spectral characteristics. Experimental results are provided to support simulations and theoretical analysis
Keywords :
discrete time systems; mean square error methods; probability; quantisation (signal); sequences; signal resolution; signal sampling; stochastic processes; analog-to-digital conversion; conversion error signal; data postprocessing; data truncation; deterministic dither sequences; deterministic dithered quantizers; discrete-time system; mean square error; nonlinear systems; performance comparison; probability density function; quantization; residual bias; small oversampling ratios; spectral characteristics; stochastic dither sequences; stochastic dithered quantizers; system resolution; time-varying signal; whitening; Analog-digital conversion; Analytical models; Instruments; Mean square error methods; Psychoacoustic models; Quantization; Signal processing; Signal resolution; Stochastic processes; Switches;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
