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EXTENDED CYCLIC COORDINATE DESCENT FOR ROBUST ROW-SPARSE SIGNAL RECONSTRUCTION IN THE PRESENCE OF OUTLIERS
			- Citation Author(s):
 - Submitted by:
 - huiping huang
 - Last updated:
 - 14 May 2020 - 3:52am
 - Document Type:
 - Presentation Slides
 - Document Year:
 - 2020
 - Event:
 - Presenters:
 - Huiping Huang
 - Paper Code:
 - SAM-P3.7
 
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The problem of row-sparse signal reconstruction for complex-valued data with outliers is investigated in this paper. First, we formulate the problem by taking advantage of a sparse weight matrix, which is used to down-weight the outliers. The formulated problem belongs to LASSO-type problems, and such problems can be efficiently solved via cyclic coordinate descent (CCD). We propose an extended CCD algorithm to solve the problem for complex-valued measurements, which requires careful characterization and derivation. Numerical simulation results show that the proposed algorithm is robust against outliers and has a higher empirical probability of exact recovery compared with other tested methods.