A Novel Translated Coprime Array Configuration for Moving Platform in Direction-of-Arrival Estimation

This paper proposes a novel coprime array configuration, which achieves more degrees of freedom (DOFs) than the existing coprime arrays for half wavelength array motion in direction-of-arrival estimation. Generally, in a moving coprime array, there exists a large number of redundant lags in its difference coarray, which limits the number of achievable DOFs. In the proposed configuration, we place the sensors of the array strategically so that the redundant lags decrease. The mathematical expression for the number of consecutive lags of the proposed moving coprime array is provided in the paper. There will be a substantial improvement in the number of consecutive DOFs of the proposed moving coprime array over the existing moving coprime arrays. Simulations are carried out to demonstrate the effectiveness of the proposed coprime array over the existing coprime arrays in moving platform.