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中国科学院大学学报 ›› 2006, Vol. 23 ›› Issue (6): 787-792.DOI: 10.7523/j.issn.2095-6134.2006.6.011

• 论文 • 上一篇    下一篇

一种基于时频分析的超宽带脉冲构造方法

王 俊; 宫 勋; 吴微威; 王卫东; 王东进   

  1. 中国科学技术大学电子工程与信息科学系,230027
  • 收稿日期:1900-01-01 修回日期:1900-01-01 发布日期:2006-11-15

Waveform Design for UWB Communications Based on Time-frequency Analyses

WANG Jun, GONG Xun, WU Wei-Wei, WANG Wei-Dong, WANG Dong-Jin   

  1. Department of electronic engineering and information science
    University of Science and Technology of China, Hefei, Anhui, 230027
  • Received:1900-01-01 Revised:1900-01-01 Published:2006-11-15

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。

关键词: 超宽带, 脉冲设计, 升余弦滚降, 正交脉冲

Abstract: 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 extant 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.

Key words: ultra-wideband, pulse design, raised cosine roll-off, orthogonal pulse

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