摘要
提出了一种新的超宽带脉冲设计方法。采用不同幅度和延迟的高斯脉冲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。该方法产生的脉冲波形具有实现简单、持续时间短、容易进行时域或频域调节等特点。同时具有良好的带内(窄带或宽带)干扰抑制的能力,能够和带内的其他通信系统更好地共存。文中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,使其满足频谱屏蔽规范的要求。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-PPMUWB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 monoeyele pulses with different amplitude and different delay, a new ultra-wideband （UWB） pulse design method for Inband （either narrowband or wideband） Interference suppression is presented. With a short duration and a simple implement, 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 UWB 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, similar designs are made for Inband Interference suppression in the existance of the presuming inband interference. In the end, the communication performance of the TH-PPM UWB pulse 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.
出处
《微波学报》
CSCD
北大核心
2008年第6期92-96,共5页
Journal of Microwaves
基金
宁波市自然科学基金资助项目(2006A610009)
关键词
超宽带
脉冲波形
干扰抑制
功率谱密度
频谱屏蔽
Ultra-wideband, Pulse shape, Interference suppression, Power spectral density, Spectral mask
