【摘要】Thispaperestablishesnewboundsontherestrictedisometryconstantswithcoherenttightframesincompressedsensing.ItisshownthatifthesensingmatrixAsatisfiestheD-RIPconditionδk<1/3orδ2k<2~(1/2)/2,thenallsignalsfwithD*farek-sparsecanberecoveredexactlyviatheconstrained1minimizationbasedony=Af,whereD*ist
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