Reseach Of Security Technology In Ultra Short Wave Wireless Communication

In the paper discusses the characteristics of m sequence, Gold sequence and chaotic sequence, at the same apply them to FH communication system and analyze the result. Based on the queuing theory, Logistic mapping and Tent mapping, this paper presents a new method for generating the chaotic FH sequences through mixed mapping in order to increase the linear complexity and anti-prediction of chaotic FH sequence. The study and the simulation results show that the FH sequence in this paper not only improve the anti-prediction of the system, but also have an ideal balance. Hamming correlation and FH distance. Moreover, a variety of those sequences can be easily implemented. It adapt to the ultra-short wave communication. Based on ultra-short wave communication, author discusses the channel equalizer. A fast channel estimation Decision-Feedback Equalizer (DFE) algorithm is introduced, which is based on the training sequences. The algorithm is given.This paper 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 ultra-short wave frequency-hopping communication to carry out the in-depth privacy communication function and id 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 communication system to realize easily and the security performance is outstanding.