MANIFOLD INTERPOLATION FOR DIVERSELY POLARIZED ARRAYS

Antenna arrays need to be calibrated to produce reliable direction-of- arrival (DOA) estimates. During the calibration process, the array res ponse vector (also called the array manifold) is measured and stored, for a finite number of directions. Most DOA estimators are based on ev aluating a specific cost function at all of the directions for which t he array manifold was stored. The direction which minimises (or maximi ses) the cost function is the initial DOA estimate. Interpolation betw een adjacent directions is then used to obtain a more accurate estimat e. The authors examine the interpolation problem for diversely polaris ed arrays and propose interpolation techniques that provide precise DO A and polarisation estimates.