Study on the Influence of Space–Time Adaptive Processor on Single Point Position and Real‐Time Kinematic for GNSS Antenna Array Anti‐jamming Receiver

ABSTRACT Space‐time adaptive processor (STAP) has been widely used in the GNSS antenna array anti‐jamming receiver. The cost of STAP algorithms, including the minimum variance distortion‐less response (MVDR) algorithm and power inversion (PI) algorithm, is introducing measurement errors. However, there is no systematic answer to the principle of error introduction, the magnitude of error and its influence on single point position (SPP) and real‐time kinematic (RTK). We have conducted a systematic study on the above‐mentioned issues. Firstly, the principle of error introduction was theoretically studied. Then, a large number of simulations were conducted to evaluate the magnitude of the error. Finally, simulated errors are introduced into the B1I and B3I real measurements to implement SPP and RTK to evaluate the influence of the STAP algorithms on SPP and RTK. Results show that for SPP, the influence of STAP algorithms on the B1I + B3I dual‐frequency ionosphere‐free combination SPP is larger than that on the B1I single‐frequency SPP; for RTK, the influence of STAP algorithms on the B1I + B3I dual‐frequency uncombined RTK is smaller than that on the B1I single‐frequency RTK. In addition, the influences of the MVDR algorithm on SPP and RTK are smaller than those of the PI algorithm.