Novel demodulation scheme of antipodal chaos shift keying communication system

作者：Li Hui^*; Feng Sifeng; Sun Yingpei

来源：Journal of Information and Computational Science, 2010, 7(14): 3283-3290.

• Chaos communications
• Chaos shift keying communication systems
• Chaos-shift keying
• Chaotic signal
• Coherent demodulation
• Extended Kalman filter algorithm
• High bit error rates
• Modulated signal
• Particle filter
• Particle filter algorithms
• Received signals
• Tracking signals

For the antipodal chaos shift keying communication system, a problem of high bit error rate caused by coherent demodulation scheme exists when the synchronization is not ideal. A novel demodulation scheme was proposed. This scheme synchronizes the received modulated signal by two different chaotic signal trackers and judges the sent data by comparing the two mean square error between the different tracking signals and the received signal. Extended Kalman filter algorithm and particle filter algorithm are adopted to track the chaotic signal in the simulation. The results show that compared to the traditional coherent demodulation scheme, the proposed scheme can low the bit error rate when the synchronization is not ideal, and particle filter algorithm has better performance than extended Kalman filter algorithm.

• 出版日期2010
• 单位Polytechnic university