Linear Regression without Correspondences via Concave Minimization
Abstract
Linear regression without correspondences concerns the recovery of a signal in the linear regression setting, where the correspondences between the observations and the linear functionals are unknown. The associated maximum likelihood function is NP-hard to compute when the signal has dimension larger than one. To optimize this objective function we reformulate it as a concave minimization problem, which we solve via branch-and-bound. This is supported by a computable search space to branch, an effective lower bounding scheme via convex envelope minimization and a refined upper bound, all naturally arising from the concave minimization reformulation. The resulting algorithm outperforms state-of-the-art methods for fully shuffled data and remains tractable for up to -dimensional signals, an untouched regime in prior work.
Cite
@article{arxiv.2003.07706,
title = {Linear Regression without Correspondences via Concave Minimization},
author = {Liangzu Peng and Manolis C. Tsakiris},
journal= {arXiv preprint arXiv:2003.07706},
year = {2020}
}