摘要
本文提出了一种基于小波包变换的多载波子信道并行传输的CDMA 系统模型和利用不同小波包子空间进行分集接收的概念,结合多径信道,进行了理论分析,利用GSM-TU6 信道模型对所提出的系统进行了性能仿真。
In this paper we proposed a new multicarrier(MC) CDMA(code division multiple access)system based on wavelet packet transform(WPT)and gave the idea of the diversity reception in wavelet packet subspaces.We looked into the performance of the proposed system in the multipath environment and have found that the nature of close support in time domain and localization in frequency domain of the wavelet packet function makes the system superior to conventional ones.The computer simulation shows that the WPT CDMA system outperforms the DFT(discrete Fourier transform)based MC CDMA system in the channel specified by GSM TU6.In the meantime the diversity reception with equal combining of different wavelet packet subspaces can improve the performance of the proposed system remarkably.
出处
《通信学报》
EI
CSCD
北大核心
2000年第1期13-21,共9页
Journal on Communications
基金
863 基金资助项目
关键词
小波包变换
MC-CDMA
移动通信
multicarrier
code division multiple access
wavelet packet transform