Wideband Elliptical Arrays for DoA and ToA Estimation in Multipath Environments

In this paper, we present a phase-mode method for the estimation of time-of-arrival (ToA) and direction-of-arrival (DoA) in smart wireless channels via concentric elliptical arrays with wideband characteristics. The method can be efficiently applied in line-of-sight (LoS) and non-line-of-sight (NLoS) radio environments including multipath components. It generalizes former developments based on wideband circular arrays, as circular and linear geometries are particular cases contained in this approach. In addition, it allows for the implementation of quasi-arbitrary array patterns formed by the superposition of elliptical arrays with different geometries (size, eccentricity, rotation). Finally, some simulations and experimental results in the millimeter-wave range are carried out to illustrate the correct performance of the wideband method.