Composite optimization for robust rank one bilinear sensing
Composite optimization for robust rank one bilinear sensing
复制标题
稳健的一级双线性传感的复合优化
DOI:
10.1093/imaiai/iaaa027
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Drusvyatskiy, Dmitriy
中科院分区:
文献类型:
--
作者:
Charisopoulos, Vasileios;Davis, Damek;Díaz, Mateo;Drusvyatskiy, Dmitriy
We consider the task of recovering a pair of vectors from a set of rank one bilinear measurements, possibly corrupted by noise. Most notably, the problem of robust blind deconvolution can be modeled in this way. We consider a natural nonsmooth formulation of the rank one bilinear sensing problem and show that its moduli of weak convexity, sharpness and Lipschitz continuity are all dimension independent, under favorable statistical assumptions. This phenomenon persists even when up to half of the measurements are corrupted by noise. Consequently, standard algorithms, such as the subgradient and prox-linear methods, converge at a rapid dimension-independent rate when initialized within a constant relative error of the solution. We complete the paper with a new initialization strategy, complementing the local search algorithms. The initialization procedure is both provably efficient and robust to outlying measurements. Numerical experiments, on both simulated and real data, illustrate the developed theory and methods.
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