The Study Of Frequency-hopping Synchronization Based On Beidou Navigation System

The frequency-hopping synchronization technology based on Beidou navigation system is a method of using Beidou precision timing signals as a precise clock synchronization to achieve frequency-hopping synchronization. This synchronization method has the advantages such as short synchronized time, long synchronization maintain time and high synchronous reliability. It will certainly become an important way of frequency-hopping synchronization.Parts of the existing frequency-hopping radios have been using the method of precise clock to achieve frequency-hopping synchronization. However, due to the confidentiality of technology, almost no information is open。And all of them use the timing signal of GPS navigation system to carry out the synchronization. The key of precision clock synchronization method is on two field:One is the precision clock extraction, the other one is the realization of encryption algorithm。In this paper, the acquisition of the Beidou precision clock signal, the compounds of precision frequency hopping as well as its application in frequency-hopping synchronization are introduced. The method of using Beidou precision clock and frequency standard signals to obtain accurate TOD signal is talked。As the complexity of the encryption algorithm, this paper didn't do research on complex encryption algorithm. In this paper, two kinds of packet encryption algorithm are introduced, and the TOD algorithm is simulated with m-sequences. 6-bit frequency control characters are output to control frequency hopping patterns. The diagram which is based on the Beidou navigation system to achieve synchronization of frequency hopping is given, and the further analysis and study are talked. The results show that the frequency hopping synchronization scheme based on Beidou navigation system can easily achieve the synchronization of frequency-hopping systems. There is a quite good future of it in application.Finally, we propose the possible problems in the application of frequency hopping synchronization technology based on Beidou navigation system and the corresponding solutions to these problems. The application of the use of the Beidou timing signal's precision clock synchronization method to achieve frequency hopping was analyzed.