You know the power of the signal; what is the face?

TBD.

See, e.g. phasemax

## Refs

- BaRo16
- Bahmani, S., & Romberg, J. (2016) Phase Retrieval Meets Statistical Learning Theory: A Flexible Convex Relaxation.
*arXiv:1610.04210 [Cs, Math, Stat]*. - GoSt16
- Goldstein, T., & Studer, C. (2016) PhaseMax: Convex Phase Retrieval via Basis Pursuit.
*arXiv:1610.07531 [Cs, Math]*. - HaVo16
- Hand, P., & Voroninski, V. (2016) An Elementary Proof of Convex Phase Retrieval in the Natural Parameter Space via the Linear Program PhaseMax.
*arXiv:1611.03935 [Cs, Math]*. - JaEH15
- Jaganathan, K., Eldar, Y. C., & Hassibi, B. (2015) Phase Retrieval: An Overview of Recent Developments.
*arXiv:1510.07713 [Cs, Math]*. - RGKD17
- Rajaei, B., Gigan, S., Krzakala, F., & Daudet, L. (2017) Robust Phase Retrieval with the Swept Approximate Message Passing (prSAMP) Algorithm.
*Image Processing On Line*, 7, 43–55. DOI.