The Design of Chaos M-ary Communication Demodulator Based on Hamilton Oscillator

Previously a novel chaos M-ary digital communication method based on spatiotemporal chaos Hamilton oscillator has been proposed. Without chaos synchronization circumstance, It has performance improvement in bandwidth efficiency, transmission efficiency and anti-whitenoise performance compared with traditional communication method. In this paper, the formula for the design of the boundary of zone dividing demodulator in additive white Gaussian noise is derived, besides, the problem about how to determine the boundary of zone dividing demodulator in additive colored noise is deeply studied; Then a solution to construct anti-colored-noise chaos M-ary communication system is proposed, in which a pre-distortion filter is added after the chaos baseband modulator in the transmitter and whitening filter is added before zone dividing demodulator in the receiver. Finally, the chaos M-ary communication system based on Hamilton oscillator is constructed and simulated in different channel noise. The result shows that the proposed method in this paper can improve the anti-colored-noise performance of the whole communication system.