Abstract:

This paper proposes a narrowband frequency hopping (FH) synchronization system without time difference restriction.FH synchronization will be partitioned into two waveforms: net entry waveform and communication waveform.The net entry waveform adopts 9 synchronization frequencies,of which 3 frequencies are independent of time.The communication waveform adopts 7 synchronization frequencies based on the Time of Day (TOD) after correction of time in the net.However,in the case of any time difference,the transceiver can achieve reliable and efficient synchronization even if 70% bandwidth is interfered.

Key words: frequency hopping;synchronization system;time difference;TOD