一种基于时频分析的超宽带脉冲构造方法  

Waveform Design for UWB Communications Based on Time-frequency Analyses

作　　者：王俊[1] 宫勋[1] 吴微威[1] 王卫东[1] 王东进[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《中国科学院研究生院学报》2006年第6期787-792,共6页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家"863"计划项目(2005AA123310);中国科学院国防科技创新基金项目(CXJJ-127);安徽省优秀青年科技基金项目(06042085)资助

摘　　要：频谱共存和兼容是超宽带无线通信系统的一个关键问题.为避免该系统与现有无线通信系统之间的相互干扰,同时尽可能地利用频谱资源,有必要对脉冲波形进行合理设计.本文在脉冲信号的时频分析基础上,设计了一种具有升余弦滚降频谱的超宽带脉冲波形,该脉冲波形时域持续时间短,频域上满足FCC的规定;并构造出具有正交特性的时域脉冲波形,使之适用于高阶调制下的超宽带系统.Coexistence and compatibility of spectrum are important aspects needed to be considered in impulse radio ultra-wideband （IR-UWB） communications. The proper waveforms of signal can decrease the influence of interference between the IR-UWB and existing systems, and improve the efficiency of spectrum resources. In this paper, based on time-frequency analyses, a novel method to design the waveforms of IR-UWB signals is proposed. The constructed waveforms are with raised cosine roll-off frequency spectrum and less time duration. Furthermore, series of time domain waveforms with orthogonal properties constructed by this method can be adopted at high-level modulated UWB systems.

关 键 词：超宽带 脉冲设计 升余弦滚降 正交冲 

分 类 号：TN929.5[电子电信—通信与信息系统]