Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

8-2015

Abstract

Compressive sensing has been successfully used for optimized operations in wireless sensor networks. However, raw data collected by sensors may be neither originally sparse nor easily transformed into a sparse data representation. This paper addresses the problem of transforming source data collected by sensor nodes into sparse representation with a few nonzero elements. Our contributions that address three major issues include: 1) an effective method that extracts population sparsity of the data, 2) a sparsity ratio guarantee scheme, and 3) a customized leaerning algorithm of the sparsifying dictionary. We introduce an unsupervised neural network to extract an intrinsic sparse coding of the data. The sparse codes are generated at the activation of the hidden layer using a sparsity nomination constraint and a shrinking mechanism. Our analysis using real data samples shows that the proposed method outperforms conventional sparsity-inducing methods.

Keywords

Sparse coding, compressive sensing, sparse autoencoders, wireless sensor newtworks.

Discipline

OS and Networks | Software Engineering

Research Areas

Software and Cyber-Physical Systems

Publication

2015 IEEE 40th Conference on Local Computer Networks (LCN), Clearwater, Florida, USA, 2015, October 26

ISBN

9781467367714

Publisher

IEEE

City or Country

Florida, Clearwater, USA

Additional URL

http://worldcat.org/isbn/9781467367714

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