摘要
提出一种基于组合映射模型产生混沌扩频序列的方法.根据扩频序列的特性要求和多址干扰性能指标,给出了一种混沌扩频序列的优选算法;将得到的优选序列应用于直扩码分多址系统,在不同信道条件下进行仿真,并与优选的Logistic混沌扩频序列进行性能比较,结果表明本方法产生的混沌扩频序列具有和Logistic混沌扩频序列相近的良好性能,而且保密性更好.
A method for generating chaotic spread-spectrum sequences based on the combined chaotic map is proposed. An optimized selection algorithm based on the property requirement of spread-spectrum sequences and the performance index of multiple access interference is also presented. Simulation is performed for the optimized chaotic sequence, and an optimized logistic sequence is applied to a direct sequence spread-spectrum CDMA system under different channel conditions. The results show that the chaotic spread-spectrum sequences generated by the proposed method have similar performance as the logistic spread-spectrum sequences and have better security.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第3期1409-1415,共7页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60572025)
教育部新世纪优秀人才基金(批准号:NCET-04-0813)
教育部重点项目(批准号:105137)
广东省自然科学基金(批准号:07006496
04205783)资助的课题~~
