The estimation performance of nonlinear least squares for phase retrieval

Meng Huang, Zhiqiang Xu

Suppose that $\mathbf{y}=|A{\mathbf{x}}_0|+\eta$ where ${\mathbf{x}}_0\in {\mathbb{R}}^d$ is the target signal and $\eta \in {\mathbb{R}}^m$ is a noise vector. The aim of phase retrie…