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• W2765477068 abstract "A recently proposed convex formulation of the phase retrieval problem estimates the unknown signal by solving a simple linear program. This new scheme, known as PhaseMax, is computationally efficient compared to standard convex relaxation methods based on lifting techniques. In this paper, we present an exact performance analysis of PhaseMax under Gaussian measurements in the large system limit. In contrast to previously known performance bounds in the literature, our results are asymptotically exact and they also reveal a sharp phase transition phenomenon. Furthermore, the geometrical insights gained from our analysis led us to a novel nonconvex formulation of the phase retrieval problem and an accompanying iterative algorithm based on successive linearization and maximization over a polytope. This new algorithm, which we call PhaseLamp, has provably superior recovery performance over the original PhaseMax method." @default.
• W2765477068 created "2017-11-10" @default.
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• W2765477068 date "2017-10-14" @default.
• W2765477068 modified "2023-09-27" @default.
• W2765477068 title "Phase Retrieval via Linear Programming: Fundamental Limits and Algorithmic Improvements" @default.
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