Null-steering GPS dual-polarised antenna arrays

Abstract

In this paper, the use of polarisation diversity in GPS adaptive antenna arrays is considered. The best way of applying the simple “null-steering” or “power inversion” criterion previously applied to non-polarimetric arrays is investigated. Two recently proposed approaches for applying null-steering techniques to polarimetric antenna arrays are reviewed and a new approach is introduced. Simulation results from an ideal polarimetric antenna array are used to compare the performance of the different techniques. Overall, the new approach maintains the best GPS satellite visibility in all interference scenarios studied in this paper.