UWB-OFDM系统的实现结构  

Implementation Structures for UWB-OFDM Systems

作　　者：徐斌[1] 毕光国[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《电子学报》2004年第F12期157-160,共4页Acta Electronica Sinica

基　　金：国家 8 63计划 (No .2 0 0 3AA1 2 32 30 )

摘　　要：超宽带 (UWB)技术与正交频分复用 (OFDM)调制相结合的UWB- OFDM系统可能成为短距离、高数据率无线网络理想的传输 接入方案之一 .然而 ,随着带宽增加 ,UWB- OFDM系统的实现难度也随之增大 .为此 ,本文系统地研究了频域直扩、多支路分集、多支路频域均衡、双层多载波频分复用、双层多载波频率分集、双层多载波跳频等几种典型的实现结构 ,以及它们的组合 .分析了不同实现结构的特点及相互关系 ,为UWB -OFDM系统的设计提供一定的理论参考 .An ultra-wideband orthogonal frequency division multiplexing system (UWB-OFDM) may be an ideal transmission/access solution for short-range,high data rate,wireless networks. As the occupied bandwidth increases,however,its implementation becomes more and more difficult.To solve this problem,we investigate a few of typical implementation structures,frequency-domain direct spreading (FDDS),multi-branch diversity (MBD),multi-branch frequency-domain equalization (MBFDE),double-layer multi-carrier frequency division multiplexing (DLMC-FDM),double-layer multi-carrier frequency diversity (DLMC-FD),double-layer multi-carrier frequency-hopping (DLMC-FH),and their combinations,for UWB-OFDM systems.The analysis focuses on the characteristics of each structure and the relationship between any two structures. The findings try to provide a theoretical foundation for the design of UWB-OFDM systems.

关 键 词：超宽带 正交频分复用 频率分集 实现结构 并行处理 

分 类 号：TN914[电子电信—通信与信息系统] TN92[电子电信—信息与通信工程]