Polarization Direction Finding Method of Interfering Radio Emission Sources

Rapid growth of radio emission sources (RES) leads to the interference of signals from various transceivers and thus complicates its positioning based on direction finding (DF). Traditional DF use structural-statistical redundancy to resolve multi-signal and multipath situations, which makes impossible to implement it in compact direction finders. The aim of current work is to investigate possibilities of polarization DF accounting interference conditions. It is proposed to use frequency and phase differences of received rays in the interference mixture of signals in tri-orthogonal antenna system (TOAS). The solution to polarization DF task of RES during interference utilize methods of search for normals to planes that are envelopes from a family of curves, which use the resultant field, induced in TOAS. The novelty of presented solution is in the realization of the idea that in the case of RES interference with frequency or phase differences in TOAS, the resulting field vector forms three-dimensional shape, which contains spatial parameters of the rays. Contribution of current investigation validates the use of relatively simple DF techniques in a complex interference environment, both for several sources and separation of rays from one source.