基于数字编码器的混沌序列发生器

A Generator of Chaos Based on Digital Ecoder

针对单一映射产生的混沌序列系统复杂度低，容易通过反向逆推估计出系统初值的缺点。提出了一种基于数字编码器的混沌序列产生方法。该方法容易用数字电路实现，且具有较高的系统复杂度；该序列由数字滤波器产生，具有较高的安全性。对产生的混沌序列初值敏感性、自相关性、互相关性能进行了分析，研究结果表明这种方法产生的序列具有较高的初值敏感性，优良的自相关性、互相关性和伪随机性。是一种有效和可靠的扩频序列。

A research is done in my paper on chaotic sequence. Aimed at overcoming the shortcoming that chaotic sequence generated by single map have low system complexity and that initial value is easily estimated by anti-deduct, a new method is constructed, based on digital encoder. This pattern can be realized easily by digital circuit, and have high system complexity also. The chaotic sequence is easily generated and have more secure for communication. The sensitivity to initial conditions properties, auto correlation properties and cross correlation properties of the new sequences are analyzed. It is indicated that the new sequences sensitivity to initial conditions, have better correlation characters and excellent pseudo randomness. A practical spread spectrum scheme is simulated in this paper, which based on the new-style chaos sequences. Simulation results show the effectiveness and reliable of the new-style chaos sequences.