The atomic norm provides a generalization of the ℓ 1 -norm to continuous parameter spaces. When applied as a sparse regularizer for line spectral estimation the solution can be obtained by solving a convex optimization problem. This problem is known as atomic norm soft thresholding (AST).It can be cast as a semidefinite program and solved by standard methods. In the semidefinite formulation there are O(N 2 ) dual variables which complicates the implementation of a standard primal-dual interior-point method ba…
scite is a Brooklyn-based startup that helps researchers better discover and evaluate scientific articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by researchers from dozens of countries and is funded in part by the National Science Foundation and the National Institute of Drug Abuse of the National Institutes of Health.