Direct Position Determination of Emitters using Single Moving Coprime Array

Abstract

The direct position determination (DPD) is a single-step method that is considered to achieve better positioning performance than that of the two-step method. In contrast to the ordinary positioning method which uses a moving uniform linear array (ULA), in this work, we consider the DPD of emitters using a single moving coprime array. The coprime array can be regarded as two subarrays with different spacing, and the initial estimates of the emitters' positions are obtained separately through these two moving subarrays respectively. The final positions are obtained by combining the results of the two subarrays, respectively. The simulation of this study indicates that the proposed DPD method has better performance than the two-step method. Moreover, the method using coprime array can achieve better results compared to the method using ULA with the same number of antenna elements.