Multiple Informaition Transmission Based On Chaotic Synchronization

In the era of big data, the explosive growth of the amount of information makes the demand for efficient information getting higher and higher. It has become an urgent need to find a way to transmit information efficiently and safely. Since the dynamic behavior of chaotic system is highly sensitive to initial conditions and its trajectory is unpredictable,chaos has been widely applied to the field of secure communication. In the traditional chaotic secure communication, chaos synchronization theory is one of the core theoretical basis. During the short twenty years, the theory of chaotic synchronization have a widely application in secure communication. However, due to some limitations, the amount of information transmitted by traditional secure communication schemes based on chaotic synchronization are very limited. To break this limitation,this paper improves the traditional chaotic secure communication scheme,and puts forward a new multiple information transmission scheme based on chaos synchronization.First of all, this paper investigates the theory and application of chaotic synchronization and studies the current situation of chaotic synchronization at home and abroad. And this paper comprehensively presents the correlative theories of chaos and chaotic synchronization.Walsh function is introduced in this paper to make it possible to realize multiple transmission. And some instructions of Walsh function is presented in this paper.Secondly, a novel chaotic communication scheme based on Walsh function is designed, where a great quantity of messages can be modulated into the drive system. At first, the original information are modulated together by Walsh function, and then multiple such modulated information are modulated into the chaotic signal, then sent into the channel. At the receiving end, a parameter estimation method is used to estimate the Walsh function modulated information, and then the original information is recovered by a Walsh function demodulation algorithm.At last, we design a simulation system to simulate the real chaotic communication system by using the software Matlab. Experimentally, a series of simulations are performed to explore the feasibility and the effectiveness of the proposed scheme. And the maximum amount of information transmitted by a chaotic signal is investigated in these simulation experiments. Both theoretical and experimental results show that this scheme is better than the traditional chaotic secure communication scheme.