DocumentCode :
3663047
Title :
On joint recovery of sparse signals with common supports
Author :
Xiaochen Zhao;Wei Dai
Author_Institution :
Department of Electrical and Electronic Engineering, Imperial College London, United Kingdom
fYear :
2015
fDate :
6/1/2015 12:00:00 AM
Firstpage :
541
Lastpage :
545
Abstract :
This work is motivated by a distributed compressed sensing (DCS) scenario where multiple sensors independently perform compressed sensing and the sparse signals share a common support. The heterogeneous case is considered where the numbers of measurements and the noise levels at different sensors may be different. To analyse the performance, we focus on a probability model for sparse signals and use the state evolution tool developed for the approximate message passing (AMP) technique. In the noise free case, we are able to quantify the asymptotic rate region for exact recovery. The rate region has a shape that is significantly different from that by information theoretic analysis and provides a guidance for resource allocation in practice. It shows that an equal allocation of the number of measurements across sensors is strictly suboptimal. Finally, we also study the effect of the correlation among nonzero components from different sparse signals, which appears in many practical scenarios.
Keywords :
"Sensors","Decoding","Joints","Compressed sensing","Noise","Algorithm design and analysis","Noise measurement"
Publisher :
ieee
Conference_Titel :
Information Theory (ISIT), 2015 IEEE International Symposium on
Electronic_ISBN :
2157-8117
Type :
conf
DOI :
10.1109/ISIT.2015.7282513
Filename :
7282513
Link To Document :
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