摘要
针对超宽带(Ultra—WideBand,UWB)多用户干扰问题,正交脉冲的产生是超宽带无线应用中关键技术。采用Rayleigh信号作为UWB基函数,使用Hermite矩阵特征向量分解方法,设计了UWB正交脉冲序列,从而达到抑制多用户干扰的目的。该方法产生的正交成形脉冲序列功率谱符合美国联邦通信委员会频谱规范,自相关性强,互相关性弱,利于多址检测。最后,分析了跳时脉位调制UWB系统的干扰抑制性能,仿真结果表明正交成形脉冲序列抗多用户干扰能力优于Gram-Schmidt过程得到的Scholtz正交脉冲序列。
The orthogonal pulses generation is a crucial technology in Ultra-WideBand （UWB） wireless application to avoid Multi-User Interference （MUI）. UWB orthogonal pulses design method based on Hermite matrix eigenvectors and Rayleigh signal is proposed for MUI suppression. The power spectral density of orthogonal shaped pulses meets with federal communications commission spectral mask, furthermore, it has many characteristics in favor of multi-access detection, such as high auto-correlation and weak cross-correlation. According to analysis and simulation of MUI suppression for pulse position modulation-time hopping UWB systems, the proposed UWB orthogonal pulses generation has better MU1 suppression performance than that of Seholtz orthogonal pulses through Gram-Schmidt process.
出处
《北京电子科技学院学报》
2012年第4期77-81,103,共6页
Journal of Beijing Electronic Science And Technology Institute
基金
北京电子科技学院基本科研业务费资助项目:混沌超宽带检测避让技术研究(BESTI-JBKY-201106)
关键词
超宽带
多用户干扰抑制
厄米特矩阵
瑞利信号
跳时脉位调制
Ultra-WideBand
Multi-User Interference Suppression
Hermite Matrix
Rayleigh Signal
Pulse Position Modulation-Time Hopping
