Investigation on Anti-Jamming Techniques for a robust and reliable Communication Electronic Warfare System

Jamming-resistant communication is crucial for safety-critical applications such as emergency alert broadcasts or the dissemination of navigation signals in adversarial conditions. Interference due to intentional/unintentional jamming, co-channel and adjacent channel users can cause severe performance degradation to the communication receivers. Several studies on Electronic Attacks (EAs) to the communication network carried out worldwide reveal that the modern communication can have catastrophe effect wherein a wireless security threats can be effectively disrupted using jammers causing the loss of communication signal or unreliable RF communication under wireless network. By emitting noise-like signals arbitrarily on the shared wireless medium, a jammer can easily disturb the network. Existing Anti-Jam (AJ) and interference mitigation techniques can be applied to reduce the impact of the jammer or interferer to a receiver by determining the characteristics of the interference, then jointly optimizing signal processing to mitigate the characterized jammer or interferer. Depending on the time-frequency nature of the strong interference signal, it may be possible to achieve relatively good anti-jam performance by applying certain signal processing techniques. In this paper, work has been carried out on the application of anti-jamming techniques to QPSK signals.