基于小波包变换的多载波CDMA系统  

A MC-CDMA system based on wavelet packet

作　　者：刘梅[1] 许荣庆[1] 杨太星[1] 栾少华[1] 董英凝[1] 张馨[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《哈尔滨工业大学学报》2004年第2期215-217,222,共4页Journal of Harbin Institute of Technology

基　　金：哈尔滨工业大学校科学技术基金(HIT.2003.09).

摘　　要：从2带滤波器组的完全重构条件入手,研究了基于小波包变换的多载波调制,给出了快速算法,并构建了基于小波包变换的多载波CDMA系统,对系统性能进行了模拟仿真。结果表明,当选择性能优良的小波包时,基于小波包变换的多载波CDMA系统性能要优于传统的基于OFDM的多载波CDMA系统。A 2-band filter banks' perfect reconstruction condition is presented, a multicarrier modulation based on the wavelet packet is provided for a fast arithmetic. A MC - CDMA system based on the wavelet packet was designed, and the capability of the system was simulated. The results indicate that when the optimal wavelet packet is seleuted, the MC - CDMA based on the wavelet packet is better than the OFDM MC -CDMA.

关 键 词：小波包变换 CDMA系统 多载波调制 快速算法 

分 类 号：TN929.533[电子电信—通信与信息系统] TN911.3[电子电信—信息与通信工程]