Anti-chirp-jamming communication based on the cognitive cycle

Conventional wireless communication systems are hardly reliable in a chirp-jamming environment. Thus, an anti-chirp-jamming communication (ACJC) scheme based on the cognitive cycle is proposed in this paper. The scheme includes three main modules, namely, chirp-jamming sensing, anti-chirp-jamming decision-making, and adaptive adjustment of communication frequency and transmission power which compose the cognitive cycle for chirp jamming. The chirp jamming sensing module detects and predicts the parameters of chirp jamming by periodogram and Kalman filter. Based on the estimated chirp-jamming parameters, the anti-chirp-jamming decision-making module makes decisions on communication frequency and transmission power by simple arithmetical computation. Finally, the ACJC system communicates with the given communication frequency and transmission power. Simulation results show that the ACJC scheme can function even with strong chirp jamming in the same band, and enable reliable communication, effectively avoiding attacks from malicious jammers.