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Block Sparse Signals Recovery Algorithm for Distributed Compressed Sensing Reconstruction

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초록

Distributed compressed sensing (DCS) states that we can recover the sparse signals from very few linearmeasurements. Various studies about DCS have been carried out recently. In many practical applications, thereis no prior information except for standard sparsity on signals. The typical example is the sparse signals haveblock-sparse structures whose non-zero coefficients occurring in clusters, while the cluster pattern is usuallyunavailable as the prior information. To discuss this issue, a new algorithm, called backtracking-based adaptiveorthogonal matching pursuit for block distributed compressed sensing (DCSBBAOMP), is proposed. Incontrast to existing block methods which consider the single-channel signal reconstruction, the DCSBBAOMPresorts to the multi-channel signals reconstruction. Moreover, this algorithm is an iterative approach, whichconsists of forward selection and backward removal stages in each iteration. An advantage of this method isthat perfect reconstruction performance can be achieved without prior information on the block-sparsitystructure. Numerical experiments are provided to illustrate the desirable performance of the proposed method.

Abstract

Distributed compressed sensing (DCS) states that we can recover the sparse signals from very few linearmeasurements. Various studies about DCS have been carried out recently. In many practical applications, thereis no prior information except for standard sparsity on signals. The typical example is the sparse signals haveblock-sparse structures whose non-zero coefficients occurring in clusters, while the cluster pattern is usuallyunavailable as the prior information. To discuss this issue, a new algorithm, called backtracking-based adaptiveorthogonal matching pursuit for block distributed compressed sensing (DCSBBAOMP), is proposed. Incontrast to existing block methods which consider the single-channel signal reconstruction, the DCSBBAOMPresorts to the multi-channel signals reconstruction. Moreover, this algorithm is an iterative approach, whichconsists of forward selection and backward removal stages in each iteration. An advantage of this method isthat perfect reconstruction performance can be achieved without prior information on the block-sparsitystructure. Numerical experiments are provided to illustrate the desirable performance of the proposed method.

참고문헌 (29)

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