基于Polycycle信号的UWB正交脉冲序列设计

UWB orthogonal pulses design based on polycycle signal

正交脉冲的产生是超宽带无线应用中的关键技术,采用Hermite矩阵特征向量分解方法,提出了一种基于Polycycle信号的UWB正交脉冲序列设计方法.该方法产生的正交成形脉冲功率谱密度分布符合FCC关于室内和室外UWB应用的辐射限制,有较高的频谱利用率,脉冲函数自相关性强,互相关性弱,利于多址检测.最后,分析了2PPM-THMA UWB系统的传输性能,仿真结果表明正交成形脉冲抗多用户干扰能力优于Scholtz脉冲.

The generation of orthogonal pulses is a crucial technology in UWB wireless application. A novel design algorithm to generate orthogonal UWB shaped pulses is proposed based on the eigen-;ector of Hermite matrix and polycycle signal. The power spectral density （PSD） of the proposed orthogonal UWB pulses meets the FCC UWB indoor and outdoor spectral mask, furthermore, it has many characteristics in favor of multi-access detection, such as high spectral occupation rate, high auto-correlation m,d very weak cross-correlation. Finally, through the analyses and simulation of suppressing multi-user interference （MUI） in 2PPM-THMA UWB systems, the proposed orthogonal UWB pulses could be proved to have more predominant anti-interference performance than Scholtz pulse.