Application of improve subspace projection technique in anti-jam of GNSS space-time receiver

It is well known that the characters of interference signal is stronger than noise and satellite signals in the GNSS receiver. We apply subspace projection to space-time process. We improve the method of subspace projection based on the CCS-MSWF structure. The new method can estimate space-time two-dimensional subspace more quickly and exactly in the case of the limited data precision, further obtain the optimal weight. Compared with the original method, the accuracy of interference subspace estimate is improved without additional computational cost. The performance of anti-jamming is excellent and stable. This method is also suitable for small samples and signal changing scene. Numerical simulation demonstrates that the improved method is effective and efficient to both narrowband and wideband interference.