Reseach On Differential Chaos Shift Keying Communication And Ultrashot Wave System

Ultrashort wave with the superior transmission performance,is widely used in civilian communications.Moreover,it is playing an important role in military communications.The security of the system can be improved by Differential Chaos Shift Keying in the process of researching ultrashort wave system.Therefore,the in-depth study and exploration on the subject can enhance our defense business.In this paper,the ultrashort wave system is encrypted by Differential Chaos Shift Keying.Firstly, the paper analyze the statistical properties of chaotic sequences Tent mapping and Logistic mapping generated respectively,and it indicates the one-dimensional Logistic chaotic sequences are more suitable for Differential Chaos Shift Keying because of more randomness and traversing the limited space entirely.Comparing with various chaotic communications technology,the paper propose an improved differential chaos shift keying scheme by combining traditional differential chaos shift keying scheme.The paper displays the schematic diagram and calculate the bit error rate.It indicates the scheme improves the resistance to Decryption.Finally, the paper analyze doppler shift and multipath delay spread in Ultrashort wave Channel,and design the Ultrashort Wave system of Chaos Shift Keying Communication,which includes a modified differential chaotic encryption module, encoding module and Ultrashort wave transceivers module.The experimental results show that the transmission rate of improved Differential Chaos Shift Keying scheme is twice as that of traditional scheme.The scheme is excellent in security and can improve the bit Error rate effectively.