Chaotic Pulse Position Modulation Without Chaos Synchronization Secure Communication System Developed

Based on the theory of nonlinear dynamics system, this paper discusses the theory about wireless chaos security communications and its history and status quo of development, then emphasizes the new communication technology-chaotic pulse position modulation, and the realization of non-chaos synchronization wireless security communication system using the technology. This system based on Logisitic map. It designs a chaos sequence generator and realizes the modulation and demodulation of chaotic pulse position by hardware. In the send site, binary message sequence is modulated between pulse sequences, then took it into wireless channel. In the receive site, we operate non-chaos synchronization in reverse and resume binary message sequence by the correlated rule of the sender.This system realize the chaos arithmetic directly by hardware and non-chaos synchronization communication by chaotic pulse position modulation technology. The system is running ok in the laboratory.The success of this system proves the non-chaos synchronization communication feasibility. The system has a good security and can prevent the pervasion of mistake code, has a well anti-jamming ability and so on. Some substantial and groping work has been done in the process of using chaos security communication in pulse wireless system and the multi-access communication of chaotic pulse position modulation.