基于小波变换的OFDM-CDMA高速电力线通信系统  

Wavelet Transform-based OFDM-CDMA High-speed Power Line Communications Systems

作　　者：周乐荣[1] 郭经红[2] 韦岗[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640 [2]国家电力公司南京电力自动化研究院,江苏南京210003

出　　处：《华南理工大学学报（自然科学版）》2004年第11期10-14,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (6 0 0 72 0 4 8)

摘　　要：在电力线上实现可靠的高速数据传输一直是电力通信和电力系统自动化的难题 .文中基于小波变换推导了OFDM传输系统的等效M带离散小波传输模型 ,提出了新的基于正交M带离散小波变换的用于高速电力线通信的OFDM CDMA通信系统 .仿真结果表明 ,该系统适合于高速电力线通信 ,具有很好的抵抗信道间干扰、码间干扰、多用户干扰及噪声干扰的性能 .The implementation of high-speed data communication through power lines is always a difficulty in the fields of power communications and power system automation. In this paper, the equivalent M-band discrete wavelet transmission mode of OFDM transmission systems was derived based on wavelet transform. A new OFDM-CDMA communications system for high-speed power line communications was then presented on the basis of orthogonal M-band discrete wavelet transform. The computer simulation results indicate that the proposed system is of much better ability to suppress inter-channel interference, inter-symbol interference, multi-user interference and noise interference, and is applicable to the high-speed power line communications.

关 键 词：小波变换 电力线通信 正交频分复用 码分多址 

分 类 号：TM73[电气工程—电力系统及自动化] TN914.4[电子电信—通信与信息系统]