Robust Recovery of Jointly-Sparse Signals Using Minimax Concave Loss Function

Kyohei Suzuki, Masahiro Yukawa

研究成果: Article査読

3 被引用数 (Scopus)

抄録

We propose a robust approach to recovering jointly sparse signals in the presence of outliers. The robust recovery task is cast as a convex optimization problem involving a minimax concave loss function (which is weakly convex) and a strongly convex regularizer (which ensures the overall convexity). The use of the nonconvex loss makes the problem difficult to solve directly by the convex optimization methods even with the well-established firm shrinkage. We circumvent this difficulty by reformulating the problem via the Moreau decomposition so that the objective function becomes a sum of convex functions that can be minimized by the primal-dual splitting method. The parameter designs/ranges for the present specific case are derived to ensure the convergence. We demonstrate the remarkable robustness of the proposed approach against outliers by extensive simulations to the application of multi-lead electrocardiogram as well as synthetic data.

本文言語English
論文番号9296314
ページ(範囲)669-681
ページ数13
ジャーナルIEEE Transactions on Signal Processing
69
DOI
出版ステータスPublished - 2021

ASJC Scopus subject areas

  • 信号処理
  • 電子工学および電気工学

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