Journal
PHYSICS LETTERS A
Volume 379, Issue 38, Pages 2277-2283Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2015.05.032
Keywords
Suprathreshold stochastic resonance; Binary quantizer; Mean square error distortion; Stochastic quantization; Least squares regression; Information transmission
Categories
Funding
- Science and Technology Development Program of Shandong Province [2014GGX101031]
- Australian Research Council from Australian Research Council [DP1093425]
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We investigate an array of stochastic quantizers for converting an analog input signal into a discrete output in the context of suprathreshold stochastic resonance. A new optimal weighted decoding is considered for different threshold level distributions. We show that for particular noise levels and choices of the threshold levels optimally weighting the quantizer responses provides a reduced mean square error in comparison with the original unweighted array. However, there are also many parameter regions where the original array provides near optimal performance, and when this occurs, it offers a much simpler approach than optimally weighting each quantizer's response. (C) 2015 Elsevier B.V. All rights reserved.
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