Securing space communication systems against reactive cognitive jammer

In this paper, we propose an anti-jamming game for space communication systems where a cognitive jammer reactively senses channels using energy detection and jams the channel using 'detect and jam' strategy while the legitimate transmitter-receiver pair uses a joint frequency hopping and power/rate adaptation approach to avoid the impact of the jamming. Jamming and anti-jamming process between legitimate satellite link and a jammer is formulated as a zero-sum game. The proposed game takes into account of the signal propagation delay, detection performance (signal detection and jamming start time) of a jammer, received jamming power from the jammer, and hopping and jamming costs. Performance of the proposed approach is evaluated with the help of simulations and the proposed approach outperforms other existing methods.