Impact on Anti-jamming Performance of GNSS Signal Bandwidth under Channel Mismatch Used Antenna Arrays

The performance of anti-jamming is limited by channel mismatch in antenna arrays navigation receivers. Under the same radio frequency (RF) channel characteristic, this paper has analyzed the influence on anti-jamming performance in different global navigation satellite system (GNSS) signal bandwidth. Increasing the bandwidth of signal is an effective way to improve the positioning accuracy in satellite navigation. According to the simulation and experiment in the case of channel mismatch, increasing the signal bandwidth would lead to anti-jamming performance degradation, which is seriously lack of theoretical support. In this paper, we derive the weight value of space-time adaptive processor (STAP) and the transfer function, and the influence of signal bandwidth to anti-jamming performance is analyzed. The theoretical analysis shows that increasing signal bandwidth would lead to anti-jamming performance degradation under the condition of channel mismatch.