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  4. Phase retrieval in high dimensions: Statistical and computational phase transitions
 
conference paper

Phase retrieval in high dimensions: Statistical and computational phase transitions

Maillard, Antoine
•
Loureiro, Bruno  
•
Krzakala, Florent  
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2020
Proceeding of the 2020 Advances in Neural Information Processing Systems
Advances in Neural Information Processing Systems

We consider the phase retrieval problem of reconstructing a n -dimensional real or complex signal X ⋆ from m (possibly noisy) observations Y μ = | ∑ n i = 1 Φ μ i X ⋆ i / √ n | , for a large class of correlated real and complex random sensing matrices Φ , in a high-dimensional setting where m , n → ∞ while α = m / n = Θ ( 1 ) . First, we derive sharp asymptotics for the lowest possible estimation error achievable statistically and we unveil the existence of sharp phase transitions for the weak- and full-recovery thresholds as a function of the singular values of the matrix Φ . This is achieved by providing a rigorous proof of a result first obtained by the replica method from statistical mechanics. In particular, the information-theoretic transition to perfect recovery for full-rank matrices appears at α = 1 (real case) and α = 2 (complex case). Secondly, we analyze the performance of the best-known polynomial time algorithm for this problem --- approximate message-passing--- establishing the existence of statistical-to-algorithmic gap depending, again, on the spectral properties of Φ . Our work provides an extensive classification of the statistical and algorithmic thresholds in high-dimensional phase retrieval for a broad class of random matrices.

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Type
conference paper
Author(s)
Maillard, Antoine
Loureiro, Bruno  
Krzakala, Florent  
Zdeborová, Lenka  
Date Issued

2020

Publisher

Curran Associates, Inc.

Published in
Proceeding of the 2020 Advances in Neural Information Processing Systems
Series title/Series vol.

Advances in Neural Information Processing Systems; 33

Volume

33

Start page

11071

URL

Paper

https://papers.nips.cc/paper/2020/file/7ec0dbeee45813422897e04ad8424a5e-Paper.pdf
Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
IDEPHICS1  
IDEPHICS2  
SPOC1  
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Event nameEvent date
Advances in Neural Information Processing Systems

Dec 6, 2020 – Dec 12, 2020

Available on Infoscience
March 5, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/175775
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