McDonnell, Mark D., Amblard, Pierre-Olivier and Stocks, Nigel G. (2010) Bio-inspired communication: performance limits for information transmission and compression in stochastic pooling networks with binary quantizing nodes. Journal of Computational and Theoretical Nanoscience, Vol.7 (No.5). pp. 876-883. doi:10.1166/jctn.2010.1434

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Abstract

A general framework for modeling surprising nonlinear interactions between redundancy and two forms of 'noise'-lossy compression and randomness is discussed. This 'stochastic pooling network' (SPN) model arose from studies of signal transduction by populations of biological sensory neurons, but is also applicable for several modern communications and computing approaches. SPNs are networks that simultaneously exhibit noise-averaging effects caused by redundancy, and lossy signal compression. Here we illustrate some interesting features of a special case of SPN, where individual network nodes are extremely lossy, and transmit single-bit observations of an analog signal. Mutual information is used to quantify the gain obtained from N such observations, which is shown to be limited by quantization noise for large input SNRs, but only by the size of the network for small input SNRs. We show that this means extreme local compression is close to optimal for small SNRs, by a comparison with the mutual information for the case of no compression. Interpretations of these results in terms of rate-distortion theory and probability of error are given indicating that requantization of the output of an SPN can lead to low bit-error-rate communication.

Item Type:	Journal Article
Subjects:	Q Science > QD Chemistry T Technology T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics
Divisions:	Faculty of Science > Engineering
Journal or Publication Title:	Journal of Computational and Theoretical Nanoscience
Publisher:	American Scientific Publishers
ISSN:	1546-1955
Official Date:	May 2010
Dates:	Date Event May 2010 Published
Volume:	Vol.7
Number:	No.5
Number of Pages:	8
Page Range:	pp. 876-883
DOI:	10.1166/jctn.2010.1434
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Funder:	Australian Research Council, Engineering and Physical Sciences Research Council (EPSRC)
Grant number:	DP0770747, EP/C523334/1 (EPSRC)

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