Robust Interference-plus-Noise Covariance Matrix Reconstruction Algorithm for GNSS Receivers Against Large Gain and Phase Errors

A novel robust interference-plus-noise covariance (INC) matrix reconstruction algorithm is proposed for global navigation satellite system (GNSS) receivers. Instead of using the presumed interference steering vectors (SVs) to reconstruct the INC matrix, the SVs projected onto the interference subspace are utilized so as to mitigate large SV mismatches caused by gain and phase errors. Simulation results indicate that the proposed algorithm performs better than the other INC matrix reconstruction algorithms in output carrier-to-noise (C/N\(_0\)) ratio. Moreover, the effectiveness of the proposed algorithm is validated by the GNSS software receiver.