摘要
本文由混沌映射产生用于直扩码分多址（ＤＳ／ＣＤＭＡ）系统的四相扩频序列，证明了周期为Ｎ的此类扩频序列的四种广义奇相关均服从均方值为Ｎ的瑞利分布。混沌四相序列的相关峰值较混沌二相序列有显著的下降，多址性能与传统四相扩频序列相同。
In this paper, we generate 4 phase sequences for DS/CDMA by chaotic maps. The generalized odd correlations of such sequences of length N are Rayleigh distributed, with mean square correlation N . The peak correlation of chaotic 4 phase sequences is reduced considerably in comparison with chaotic biphase sequences. The performance of chaotic spreading sequences is shown to be identical to conventional sequences in CDMA systems.
出处
《通信学报》
EI
CSCD
北大核心
1998年第3期40-44,共5页
Journal on Communications
基金
江苏省自然科学基金
东南大学移动通信国家重点实验室资助
