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Iteratively reweighted sparse reconstruction in impulsive noise | IEEE Conference Publication | IEEE Xplore

Iteratively reweighted sparse reconstruction in impulsive noise


Abstract:

Most of the existing sparse recovery methods are based on the squared error criterion, i.e., ℓ2-norm metric, by appropriately adding to a sparsity-promoting regularizer. ...Show More

Abstract:

Most of the existing sparse recovery methods are based on the squared error criterion, i.e., ℓ2-norm metric, by appropriately adding to a sparsity-promoting regularizer. This criterion is, however, statistically optimal only when the noise are Gaussian distributed. In fact, non-Gaussian impulsive noise with heavy tailed distribution has been reported in a variety of practical applications. To guarantee outlier-resistant sparse reconstruction for impulsive noise, in this paper we instead employ the generalized ℓp-norm (1 ≤ p <; 2) to quantify the residual error metric. By heuristically leveraging the sparsity-encouraging log-sum penalty, two iteratively reweighted algorithms are proposed for approximately solving the ℓp - ℓ0 sparse recovery problem, where the reweighted matrices constructed from the previous iterative solution are considered both for ℓp and ℓ0 metrics. Simulation results demonstrate the efficiency and robustness of the proposed algorithms.
Date of Conference: 12-15 July 2015
Date Added to IEEE Xplore: 03 September 2015
ISBN Information:
Conference Location: Chengdu, China

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