CAJ | 학술논문

针对超宽带（U1tra—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Seholtz正交脉冲序列。
침대초관대（U1tra—WideBand，UwB）다용호간우문제，정교맥충적산생시초관대무선응용중관건기술。채용Rayleigh신호작위UWB기함수，사용Hermite구진특정향량분해방법，설계료UWB정교맥충서렬，종이체도억제다용호간우적목적。해방법산생적정교성형맥충서렬공솔보부합미국련방통신위원회빈보규범，자상관성강，호상관성약，리우다지검측。최후，분석료도시맥위조제UwB계통적간우억제성능，방진결과표명정교성형맥충서렬항다용호간우능력우우Gram—Schmidt과정득도적Seholtz정교맥충서렬。
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.