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Coherence Based Sufficient Condition for Support Recovery Using Generalized Orthogonal Matching Pursuit

Aravindan Madhavan1,*, Yamuna Govindarajan1, Neelakandan Rajamohan2

1 Department of Electronics and Communication Engineering, Annamalai University, Chidambaram, 608002, Tamil Nadu, India
2 School of Electrical Sciences, Indian Institute of Technology, Farmgudi, Ponda, Goa, India

* Corresponding Author: Aravindan Madhavan. Email: email

Computer Systems Science and Engineering 2023, 45(2), 2049-2058. https://doi.org/10.32604/csse.2023.031566

Abstract

In an underdetermined system, compressive sensing can be used to recover the support vector. Greedy algorithms will recover the support vector indices in an iterative manner. Generalized Orthogonal Matching Pursuit (GOMP) is the generalized form of the Orthogonal Matching Pursuit (OMP) algorithm where a number of indices selected per iteration will be greater than or equal to 1. To recover the support vector of unknown signal ‘x’ from the compressed measurements, the restricted isometric property should be satisfied as a sufficient condition. Finding the restricted isometric constant is a non-deterministic polynomial-time hardness problem due to that the coherence of the sensing matrix can be used to derive the sufficient condition for support recovery. In this paper a sufficient condition based on the coherence parameter to recover the support vector indices of an unknown sparse signal ‘x’ using GOMP has been derived. The derived sufficient condition will recover support vectors of P-sparse signal within ‘P’ iterations. The recovery guarantee for GOMP is less restrictive, and applies to OMP when the number of selection elements equals one. Simulation shows the superior performance of the GOMP algorithm compared with other greedy algorithms.

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Cite This Article

A. Madhavan, Y. Govindarajan and N. Rajamohan, "Coherence based sufficient condition for support recovery using generalized orthogonal matching pursuit," Computer Systems Science and Engineering, vol. 45, no.2, pp. 2049–2058, 2023.



cc This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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