摘要
Given the measurement matrix A and the observation signal y,the central purpose of compressed sensing is to find the most sparse solution of the underdetermined linear system y=Ax+z,where x is the s-sparse signal to be recovered and z is the noise vector.Zhou and Yu[Front.Appl.Math.Stat.,5(2019),Article 14]recently proposed a novel non-convex weighted l_(r)-l_(2)minimization method for effective sparse recovery.In this paper,under newly coherence-based conditions,we study the non-convex weighted l_(r)-l_(2)minimization in reconstructing sparse signals that are contaminated by different noises.Concretely,the results reveal that if the coherenceμof measurement matrix A fulfillsμ<k(s;r,α,N),s>1,α^(1/r)N(1/2)<1,then any s-sparse signals in the noisy scenarios could be ensured to be reconstructed robustly by solving weighted l_(r)-l_(2)minimization non-convex optimization problem.Furthermore,some central remarks are presented to clear that the reconstruction assurance is much weaker than the existing ones.To the best of our knowledge,this is the first mutual coherence-based sufficient condition for such approach.
基金
supported in part by the National Natural Science Foundation of China(Grant Nos.12101454,12101512,12071380,62063031)
by the Chongqing Normal University Foundation Project(Grant No.23XLB013)
by the Fuxi Scientific Research Innovation Team of Tianshui Normal University(Grant No.FXD2020-03)
by the National Natural Science Foundation of China(Grant No.12301594)
by the China Postdoctoral Science Foundation(Grant No.2021M692681)
by the Natural Science Foundation of Chongqing,China(Grant No.cstc2021jcyj-bshX0155)
by the Fundamental Research Funds for the Central Universities(Grant No.SWU120078)
by the Natural Science Foundation of Gansu Province(Grant No.21JR1RE292)
by the College Teachers Innovation Foundation of Gansu Province(Grant No.2023B-132)
by the Joint Funds of the Natural Science Innovation-driven development of Chongqing(Grant No.2023NSCQ-LZX0218)
by the Chongqing Talent Project(Grant No.cstc2021ycjh-bgzxm0015).
