University of Oulu

M. Leinonen, M. Codreanu and M. Juntti, "Distributed Distortion-Rate Optimized Compressed Sensing in Wireless Sensor Networks," in IEEE Transactions on Communications, vol. 66, no. 4, pp. 1609-1623, April 2018. doi: 10.1109/TCOMM.2018.2790385

Distributed distortion-rate optimized compressed sensing in wireless sensor networks

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Author: Leinonen, Markus1; Codreanu, Marian1; Juntti, Markku1
Organizations: 1Centre for Wireless Communications - Radio Technologies, University of Oulu, University of Oulu, 90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.7 MB)
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Language: English
Published: Institute of Electrical and Electronics Engineers, 2018
Publish Date: 2018-04-19


This paper addresses lossy distributed source coding for acquiring correlated sparse sources via compressed sensing (CS) in wireless sensor networks. Noisy CS measurements are separately encoded at a finite rate by each sensor, followed by the joint reconstruction of the sources at the decoder. We develop a novel complexity-constrained distributed variable-rate quantized CS method, which minimizes a weighted sum between the mean square error signal reconstruction distortion and the average encoding rate. The encoding complexity of each sensor is restrained by pre-quantizing the encoder input, i.e., the CS measurements, via vector quantization. Following the entropy-constrained design, each encoder is modeled as a quantizer followed by a lossless entropy encoder, and variable-rate coding is incorporated via rate measures of an entropy bound. For a two-sensor system, necessary optimality conditions are derived, practical training algorithms are proposed, and complexity analysis is provided. Numerical results show that the proposed method achieves superior compression performance as compared with baseline methods, and lends itself to versatile setups with different performance requirements.

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Series: IEEE transactions on communications
ISSN: 0090-6778
ISSN-E: 1558-0857
ISSN-L: 0090-6778
Volume: 66
Issue: 4
Pages: 1609 - 1623
DOI: 10.1109/TCOMM.2018.2790385
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
Funding: This research was financially supported by the Academy of Finland, Emil Aaltonen Foundation, HPY Research Foundation, Infotech Oulu Doctoral Program, Nokia Foundation, Riitta ja Jorma J. Takanen Foundation, Tauno Tönning Foundation, and Walter Ahlström Foundation.
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