干扰抑制的UWB脉冲设计与性能分析

Design and performance analysis of UWB pulse with interference suppression

提出了一种新的带内(窄带或宽带)干扰抑制的超宽带脉冲的设计方法。采用不同幅度和延迟的高斯脉冲的组合来拟合抽样函数脉冲,实现了超宽带频谱屏蔽的高效逼近,并能够和带内的其他通信系统更好地共存。在介绍设计原理的基础上,给出了设计时域波形的具体实现及波形所对应的功率谱密度图,使其满足FCC频谱屏蔽的要求。同时,对于假设存在的带内干扰对波形进行类似的设计,使其具备抑制干扰的能力。最后,分析了TH-PSKUWB系统的传输性能,并和最佳单周期高斯波形进行了详细的比较,结果表明:其误码性能远远优于最佳单周期高斯波形。

Using the combination of Gaussian monocycles pulse with different amplitude and different delay, a new ultra-wideband（UWB）pulse design method for inband（either narrowband or wideband）interference suppression is presented. The obtained UWB pulse not only meet Federal Communications Commission （FCC） spectral mask, but dramatically suppress the mutual interferences and successfully solves the coexistence problem between UWt3 system and others existing communication system. We first explained the theory of the method, then through the examples and simulations, gave the detail pulse shape and its power spectral density （PSD） that satisfy the FCC mask. Simultaneously, a similar design that suppressing interference is made that supposing some interference exists. In the end, the communication performance of TH-PSK UWB system is analyzed in the paper. Comparing with optimal Gaussian-based monocycle, our pulse has an obvious advantage over the optimal Gaussian-based monocycle on Bits Error Rate.