An Enhanced Anti-jamming Capability Method for Frequency Hopping Synchronization System

The key issue of FH systems is the frequency-hopping patterns of sender and receiver can be accurately synchronized. Therefore, receiving reliable synchronization information is very important for whether the FH system can be accurately, rapidly synchronized and normally worked. This paper provided an effective anti-jamming method for synchronization of frequency hopping (FH) system. According to this method, the TOD (time of date) message for FH synchronization is transmitted with both error correction code and direct sequence (DS) spread spectrum. The method has good performance both in fixed broadband jamming and tracing jamming environment. The method makes the system be quickly synchronized even in the stronger interference condition, and thereby improve the performance of system.