计算机科学 ›› 2015, Vol. 42 ›› Issue (3): 42-46.doi: 10.11896/j.issn.1002-137X.2015.03.009
张晓蓉,吴成茂,李文学
ZHANG Xiao-rong, WU Cheng-mao and LI Wen-xue
摘要： 针对传统扩频码周期短及安全性差的不足,提出混沌映射与自编码相融合的扩频码构造方法。该方法首先将Logistic混沌映射产生的序列进行同态均匀映射以获取高平衡度伪随机序列,其次与其不等长子序列复合重复迭代并生成长度随迭代次数呈几何级数增加的复合符号序列,最后与自编码序列经二维Henon映射相融合产生高质量复合随机序列。以混沌和自编码为基础分析该方法的有效性,并与现有扩频码进行仿真测试比较,结果表明新扩频码具有良好的相关特性和较高的复杂性,并能获得较低的扩频误码率。
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