Rearranged Coprime Array to Increase Degrees of Freedom and Reduce Mutual Coupling

International audienceCoprime array for direction of arrivals nding has attracted increasing interest since it can provide enhanceddegrees of freedom. However, due to the holes in the dierence coarray, the available information is notfully exploited. In this paper, we propose a rearranged coprime array conguration to ll the holes inthe coprime dierence coarray. The proposed new array allows lling the holes and reducing the mutualcoupling eect at the same time. We classify all the holes in a holes-triangle as a design guideline for theproposed rearranged coprime array. Few redundant sensors of the generalized coprime array are rearrangedat sparse positions, which are determined by the position of holes. By doing so, the consecutive part of theconventional coprime dierence coarray can be signicantly increased. Meanwhile, the mutual coupling canalso be dramatically reduced because the redundant sensors are relocated at remote positions. Simulationresults verify the superiority of the proposed array compared with other sparse arrays