一种新的混沌扩频序列及其性能分析

摘要

结合传统的混沌映射,提出一种组合式混沌映射模型.给出了产生新的混沌扩频序列的方法.首先由给定初值代入组合式混沌映射进行迭代,并且通过随机的参数切换选择不同的组合混沌映射,再将迭代产生的序列进行预处理,最后将预处理后的序列进行L比特选择得到新的混沌扩频序列.对得到的混沌扩频序列进行平衡性、保密性和相关性分析,并与现有的混沌扩频序列的性能进行比较.结果表明,该混沌扩频序列具有与现有的混沌扩频序列相近的相关性,而且其平衡性、保密性更好.%By the research of the original chaotic map, a new method to generate a chaotic spread spectrum sequence based on the combined chaotic model is proposed. The basic contents of this method are as follows. Firstly, put original given data into the mixed model to iterate. Then preprocess the result, a sequence, generated by(1). Finally, make a bit-L-selection from the sequence generated by. Then, to obtain a new sequence. Justifying this new method is to analyze the balance property, security property and correlation of this new sequence. By the analysis and the comparison with the properties of the current sequence, it is proved that this new method is effective on the grounds that the sequence generated by it has a similar correlation, better balance and security property.