This paper considers the question of recovering the phase of an object from intensity-only measurements, a problem which naturally appears in X-ray crystallography and related disciplines. We study a physically realistic setup where one can modulate the signal of interest and then collect the intensity of its diffraction pattern, each modulation thereby producing a sort of coded diffraction pattern. We show that PhaseLift, a recent convex programming technique, recovers the phase information exactly from a number of random modulations, which is polylogarithmic in the number of unknowns. Numerical experiments with noiseless and noisy data complement our theoretical analysis and illustrate our approach.
Phase Retrieval from Coded Diffraction Patterns
E. Candès,Xiaodong Li,M. Soltanolkotabi
Published 2013 in arXiv: Information Theory
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- Publication year
2013
- Venue
arXiv: Information Theory
- Publication date
2013-10-11
- Fields of study
Mathematics, Physics, Computer Science
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