Nearly optimal bounds for the global geometric landscape of phase retrieval

Jian-Feng Cai, Meng Huang, Dong Li +1

The phase retrieval problem is concerned with recovering an unknown signal $\mathbf{x}\in {\mathbb{R}}^{\mathbf{n}}$ from a set of magnitude-only measurements $y_j=|\langle \bf{a}_j,\bf{x} \rangle…