Research on Space-Frequency Two-Dimensional Joint Anti-Jamming Technology Based on GNSS Systems

With the rapid development of jamming technology, jamming methods have become increasingly diverse, and jamming waveforms are increasingly difficult to distinguish. Meanwhile, the signals received by GNSS systems are extremely weak due to path attenuation. Therefore, GNSS systems operating in such electromagnetic environments require strong anti-jamming capabilities to function stably. This paper proposes a space-frequency two-dimensional joint domain anti-jamming technology based on a multi-antenna and multi-channel navigation system. By jointly iterating in the spatial and frequency domains of multiple antennas, the optimal weights that simultaneously satisfy signal enhancement and interference nulling are obtained for space-frequency joint domain filtering, thereby achieving effective suppression of powerful power-suppression jamming.