A Low-Complexity Hybrid Interference Suppression Scheme Using Spectral Self-Coherence Property For GNSS Receivers

Global navigation satellite system (GNSS) receivers are vulnerable to hostile interference threads, such as jamming and spoofing. A novel low-complexity scheme based on multistage wiener filter(MWF) based space-time adaptive processing (STAP) is proposed to suppress hybrid interference by using the cross spectral self-coherence property. An orthogonal complement space of spoofing signals is estimated to constructed auxiliary weight vector. Simultaneously, spoofing number is also estimated with minimum description length (MDL) criterion and spatial spectrum. The primary weight vector is built based on the relationship between both channels derived with minimum mean square error (MMSE) criterion. Analytical results and some numerical examples are presented to demonstrate the effectiveness of the proposed scheme in terms of beam pattern and the output signal-to-interference-plus-noise ratio (SINR).