Abstract
We study the convolutional phase retrieval problem, which considers recovery of an unknown signal x ∈ ℂn from m measurements consisting of the magnitudeofits cyclic convolution withaknown kernel a of lengthm. This model is motivated by applications to channel estimation, optics, and underwater acoustic communication, where the signal of interest is acted on byagiven channel/filter, and phase informationisdifficultorimpossible to acquire. We show that when a is random and m is sufficiently large, x can be efficiently recovered up to a global phase using a combination of spectral initialization and generalized gradient descent. The main challenge is coping with dependencies in the measurement operator; we overcome this challenge by using ideas from decoupling theory, suprema of chaos processes and the restricted isometry property of random circulant matrices, and recent analysis for alternating minimizing methods.
| Original language | English |
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| Title of host publication | NIPS'17: Proceedings of the 31st International Conference on Neural Information Processing Systems |
| Editors | UV Luxburg, I Guyon, S Bengio, H Wallach, R Fergus |
| Pages | 6088–6098 |
| Number of pages | 11 |
| ISBN (Electronic) | 9781510860964 |
| DOIs | |
| State | Published - Dec 2017 |
| Externally published | Yes |
| Event | 31st Conference on Neural Information Processing Systems - Long Beach Convention Center, Long Beach, United States Duration: 4 Dec 2017 → 9 Dec 2017 Conference number: 31st |
Publication series
| Name | Advances in Neural Information Processing Systems |
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| Volume | 30 |
| ISSN (Print) | 1049-5258 |
Conference
| Conference | 31st Conference on Neural Information Processing Systems |
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| Abbreviated title | NIPS'17 |
| Country/Territory | United States |
| City | Long Beach |
| Period | 4/12/17 → 9/12/17 |