OTFS Anti-Jamming via Delay-Doppler Domain Equalization

The ubiquitous electromagnetic jamming in the operational environment severely degrades the performance of communication systems. In traditional multi-carrier systems, antijamming techniques typically mitigate jamming by attenuating the affected frequency components. However, in OTFS systems, such approaches introduce significant pseudo-peak distortion, resulting in overall performance degradation. To address this issue, this paper proposes an iterative search method based on the minimum bit error rate (BER) criterion. By optimizing the filter tap coefficients in the Delay-Doppler (DD) domain, the proposed approach effectively balances the impact between residual jamming and pseudo-peak distortion, thereby maximizing system transmission performance. Simulation results validate the effectiveness of the proposed anti-jamming scheme in enhancing system reliability.