Abstract: For utilizing the characters of high-security and ant-intercepting about chaotic sequence, this paper designs a scheme of chaotic spread- spectrum communication based on phase offset. In the sending end, the data is sent in the format of frame. The information of phase offset is periodically sent to the receiver by differential chaotic phase-shifting keying. The receiver demodulates the information of phase-offset. By comparing the phase offset-difference of the two chaotic sequences, the receiving sequence and the local sequence, the receiver accelerates or delays the local chaotic iteration in order to achieve synchronization and demodulation. Simulation results show that chaotic spread-spectrum signal can be received at any time by the scheme and correctly demodulated, and the spread-spectrum system has good ant-jamming performance.

Key words: non-periodic, chaotic spread-spectrum communication, phase offset, frame format, differential chaotic phase-shifting keying, matched receiving

摘要： 为充分利用混沌序列的高保密性和抗截获性，设计一种基于相位偏移量同步的混沌扩频通信方案。系统的发送端采用数据帧格式，定时地将混沌扩频序列的相位偏移信息通过差分混沌相移键控的方式发送到接收端，接收端通过比较本地序列与接收序列的相位差，加速或延缓本地混沌迭代，从而实现非周期扩频序列的同步与解调。仿真实验结果表明，该方案可实现混沌扩频信号在任意时刻的接收与解调，具有较好的抗噪声性能。

关键词: 非周期, 混沌扩频通信, 相位偏移量, 帧格式, 差分混沌相移键控, 匹配接收

CLC Number: 

• TP393