Constraint-Based Local Search for the Costas Array Problem

Abstract

TheCostasArrayProblemisahighlycombinatorialproblem linked to radar applications. We present in this paper its detailed mod- eling and solving by Adaptive Search, a constraint-based local search method. Experiments have been done on both sequential and parallel hardware up to several hundreds of cores. Performance evaluation of the sequential version shows results outperforming previous implemen- tations, while the parallel version shows nearly linear speedups w.r.t. the sequential one, for instance 120 for 128 cores and 230 for 256 cores.