| 利用小波函数生成UWB正交成形脉冲序列的方法 |
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| 引用本文： | 邹卫霞,聂晶,周正.利用小波函数生成UWB正交成形脉冲序列的方法[J].北京邮电大学学报,2006,29(4):61-64. |
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| 作者姓名： | 邹卫霞 聂晶 周正 |
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| 作者单位： | 北京邮电大学 电子工程学院，北京100876 |
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| 基金项目： | 国家自然科学基金，教育部重点实验室基金 |
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| 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。
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| 关 键 词： | 超宽带技术 成形脉冲 功率谱密度 小波 |
| 文章编号： | 1007-5321（2006）04-0061-04 |
| 收稿时间： | 2005-08-24 |
| 修稿时间： | 2005年8月24日 |
Optimal Design for UWB Pulse |
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| ZOU Wei-xia,NIE Jing,ZHOU Zheng.Optimal Design for UWB Pulse[J].Journal of Beijing University of Posts and Telecommunications,2006,29(4):61-64. |
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| Authors: | ZOU Wei-xia NIE Jing ZHOU Zheng |
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| Affiliation: | School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876,China |
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| 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. |
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| Keywords: | ultra wide band shape impulse power spectral density wavelet |
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