Phase Center Correction for GNSS Adaptive Anti-Jamming Antenna Array

To implement precise position and measurement of location and attitude in the presence of interference, the error induced by antenna array phase center offset should be reduced as much as possible. A phase center compensation model was established for anti-jamming antenna array. Taking every element of the array as antenna of the multiple phase center, a calculation method was derived to get the equivalent phase center position of adaptive anti-jamming antenna array. And the error induced by phase center offset in anti-jamming RTK system was analyzed. Phase center offset of antenna array was corrected by compensating carrier phase observable. Simulation results show that the position of equivalent phase center of antenna array varies with interference and adopted algorithms. Correspondingly, error induced by phase center offset cannot be compensated using fixed lookup table, but can be compensated with the carrier phase observable corrected by the anti-jamming calculation result in real time.