Design, Simulation and Evaluation of One Anti-Jamm Frequency Hopping Communication System in Multi-Path Channels

One of the main concerns in communication systems is transmission and data security which implies immunity against interferences and security against eavesdroppers. Nowadays, frequency hopping is considered as a powerful technique in communication systems for combating intentional and non-intentional interference which provide transmission security. Implementation of these systems in multipath communication channels along with low bit error rate is of most importance. In this paper, regarding to jamming effects on transmitted signals in multi path channels, a pair of receiver and transmitter of a frequency hopping communication system are designed for defeating interference and preserving synchronization. A survey on bit error rate of the transmitter and receiver pair in synchronization and operational modes is carried out via Simulating designed system and testing it in different channels including AWGN, Rayleigh fading and multipath channels. Bit error rate graphs of our design simulation shave less than 0.5 dB variation with the best existing results for same BER. As for good operation of time and frequency synchronization blocks, practical implementation of suggested frequency hopping system is justified for multipath channels.