The Research Of The Chaos Sequence And Its Application In Privacy Commumication System

Through to the chaos mapping research in this paper, aimed at overcoming the shortcoming that spread spectrum sequence generated by single map has low system complexity and that initial value is easily estimated by anti-decode, the chaos sequence which produces by the Logistic mapping and the Cai electric circuit. There is a new chaos sequence according to the chaos producer of series structure, and has studied this chaos sequence randomness, the balanced state, the tourist itinerary characteristic, the autocorrelation and the cross-correlation function and so on, finally indicated this sequence extremely suitablly uses in the chaos privacy communication.It has analyzed theoretically the chaos privacy communication system in this paper, further has studied the frequency-hopping communications system and the application of the chaos sequence, and indicated the frequency-hopping communication system comparing with other communication systems to have the multi-sites and the high frequency band use. The tool bag of SIMULINK structures a frequency-hopping communications system in MATLAB, and the chaos sequence substitutes the pseudo-random sequence of the frequency-hopping communication to carry out the in-depth privacy communication function and is analyzed its feasibility. The result indicated that the chaos producer of series structure produces the chaos spread spectrum sequence which has the good autocorrelation and the mutual correlation characteristics, moreover it constructs the frequency-hopping communications system to realize easily and the security performance is outstanding.