DESIGN AND SIMULATION OF A SECURE WIRELESS NETWORK AGAINST JAMMING ATTACKS

This project presents the design and simulation of a secure wireless network aimed at mitigating jamming attacks using the Frequency-Hopping Spread Spectrum (FHSS) technique. The simulation evaluates network performance across four receivers by comparing scenarios with and without FHSS under targeted jamming conditions. In the static (non-FHSS) configuration, Packet Delivery Ratio (PDR) remains at 100% when the fixed channels used by receivers do not overlap with the jammer's targeted channels. Conversely, when FHSS is employed, the PDR decreases to approximately 70%, consistent with theoretical predictions based on the 30% probability of hopping onto jammed channels. Despite the performance reduction, FHSS demonstrates improved resilience by maintaining packet delivery even when the jammer is active. Bit Error Rate (BER) analysis reveals a similar trend: 0% BER without FHSS and around 25–30% BER with FHSS, attributed to packet corruption when hopping into jammed channels. While FHSS introduces a performance trade-off in unjammed scenarios, it significantly enhances security and robustness in environments with active jamming threats. The findings underscore FHSS’s effectiveness in securing wireless networks against jamming attacks while maintaining acceptable communication quality.