A novel chaos oscillation and its application in wireless communication

Chaotic communication has become research hotspot in recent years. But in high speed data transmission communication, due to the restriction of chaos synchronization, its communicating effect is not superior to the traditional methods (such as Quadrature Phase Shift Keying). In this paper a novel spatiotemporal chaos Hamilton oscillator is discussed in detail, and a new chaos M-ary digital modulation and demodulation method based on Hamilton oscillator is proposed. By using region controllable characteristics of chaos Hamilton oscillator in phase plane and chaos unique characteristic, which is sensitive to initial value, zone mapping method is proposed. Thus the M-ary information chaos modulation is realized. In addition, zone partition demodulation method is proposed based on the structure characteristic of Hamilton modulated information. Finally the communication system based on the two methods is constructed on the computer. The simulation shows that in high speed transmission communications and with no chaos synchronization circumstance, the proposed chaos M-ary modulation and demodulation method has outperformed some conventional M-ary modulation methods, such as QPSK in bit error rate. Besides, it has performance improvement in bandwidth efficiency, transmission efficiency and anti-noise performance, and the system complexity is low and chaos signal is easy to be generated.