北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2006, Vol. 29 ›› Issue (4): 61-64.doi: 10.13190/jbupt.200604.61.zhanghx

• 论文 • 上一篇    下一篇

利用小波函数生成UWB正交成形脉冲序列的方法

张洪欣, 吕英华, 贺鹏飞, 王野秋, 徐 勇   

  1. 北京邮电大学 电子工程学院,北京100876
  • 收稿日期:2005-08-24 修回日期:1900-01-01 出版日期:2006-08-30 发布日期:2006-08-30
  • 通讯作者: 张洪欣

A New Orthogonal Pulses Shaping Method for UWB

ZHANG Hong-xin ,LU Ying-hua, HE Peng-fei, WANG Ye-qiu, XU Yong   

  1. School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876,China
  • Received:2005-08-24 Revised:1900-01-01 Online:2006-08-30 Published:2006-08-30
  • Contact: ZHANG Hong-xin

摘要:

基于小波函数和Hermite矩阵特征向量,提出了一种产生超宽带(UWB)正交成形脉冲序列的方法。首先利用小波函数产生小于1 ns的脉冲波形,然后构造Hermite矩阵,根据其特征向量和Gram-Schmidt过程得到UWB正交成形脉冲序列。仿真结果表明,利用这种方法产生的UWB正交成形脉冲的功率谱密度分布满足美国联邦通信委员会 (FCC)频谱模板的要求,具有优良的频谱利用率和很好的自相关与互相关特性,可以满足UWB对于减小多用户间干扰的要求。

关键词: 超宽带技术, 成形脉冲, 功率谱密度, 小波

Abstract:

A method to numerically generate orthogonal ultra wide band (UWB) shaping pulse series is proposed based on wavelet and Hermitian matrix eigenvectors. In order to construct the Hermitian matrix, an appropriate pulse in less than 1 ns duration time was first generated based on wavelet. Then, the orthogonal pulse series are produced through Gram-Schmidt process using the Hermitian eigenvectors given by Hermitian matrix. The simulation results show that the power spectral density (PSD) distribution of the short time pulses generated with this method is constrained to the Federal Communications Commission (FCC) spectral mask for UWB, and the pulses have the characteristics of higher spectral utility rate, excellent autocorrelation and cross-correlation properties compared to the usual ones. This can meet the requirement for UWB to suppress the interference between multi-users.

Key words: ultra wideband, shape impulse, power spectral density, wavelet

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