Design Of Chaotic FH Signal Prediction And Tracking System

Chaotic signal processing is an important nonlinear science branches,and is gainingextensive attention at home and abroad.According to the practical demands ofcommunication countermeasure, processing method of chaotic signal and itsimplementation technology.This paper mainly studies the problem of prediction ofhopping frequency,the chaotic FH codeprediction research of nonlinear theory,realizethe tracking interference infrequency hopping codes,and use the software simulation,there are the following contents.1. This paper analyzes the dynamics of hopping code, and use software for thesimulation, while a variety of frequency-hopping signals measured properties arestudied and simulated,We find that the frequency hopping sequence, chaotic time seriesgenerated by many real hopping frequency codes have chaotic characteristics.2. According to the basic principles for the communication system, Chaotic noisehas found Gauss white noise interference performance similar, chaotic noise withdifferent initial values of error on the system transmission rate has little effect on thenoise is easily realizated and control through the software and hardware little effect.wesimulate the communication transmission effect around the chaotic noise;and drawchaotic FH tracking system structure and the experimental system structure.3. About frequency prediction problem of hopping code, four different predictionmethods are experimental simulated, Volterra adaptive algorithm, phase space methodbased on proximal point method, BP neural network and RBF neural network method.4. In this paper, a fast frequency measurement algorithm using piecewise linear functioninstead of the complex nonlinear function. We save the time for frequency measurement and fastimplementation on FPGA By the MATLAB simulation experiments.The assessment method forchaos interference system are studied, and made simulation study on influence of chaoticinterference in communication.5. It designs the hopping communication signal prediction and trackingexperimental demonstration system, including user interface design, data transfer, dataexchange, etc. The demonstration system is to study the chaotic forecasting methods inhigh-speed digital signal processor implementations.The FH set and the frequency agile radar bring forward challenge to conventional jamming technology, and cause that the jamming model is changed from narrowbandspot jamming to wide band barrage jamming. The method not only wastes the jammingresource but also reduces the jamming effects. The required time of frequency measureis very strict in the conventional in-phase spot jamming, so the jamming is leaded to faileasily. For resolving these problems, the corresponding method is that we can find theFH rule or the frequency agile rule according to the intercepted frequency information.The method can establish theoretic and technical foundation for inducting narrowbandspot jamming.While the rapid development of computer skills and the software technology, theapplication software and hardware technologies will combine with each other at large,and it has a broader space for development and a more profound impact in thecommunications field.