窄带干扰抑制的一种新型频率编码正交UWB脉冲设计  

A New Frequency Coded Orthogonal UWB Pulse Design for Narrow-band Interference Suppression

作　　者：洪利[1] 马俊飞[1] 刘玮[2] 周正[2] 

机构地区：[1]中国石油大学(华东)计算机与通信工程学院,山东东营257061 [2]北京邮电大学泛网无线实验室,北京100876

出　　处：《通信技术》2007年第11期91-93,99,共4页Communications Technology

基　　金：北京邮电大学泛网无线通信教育部重点实验室资助项目(2007102);中国石油大学(华东)研究生创新基金资助项目(S2007-24)

摘　　要：文中提出一种基于正交载波和伪随机序列的新型频谱编码正交UWB脉冲设计方法,该方法是在频域中利用PN序列对经过频移的子脉冲进行编码来产生正交脉冲。在IR-UWB(脉冲无线电超宽带)中引入了正交载波和PN序列,使其不仅具有传统IR-UWB和多频带CB-UWB(基于载波的超宽带)优点,而且提高了UWB信号发射的瞬时频谱和瞬时能量的效率。脉冲的自相关和互相关特性皆优于传统的脉冲。另外,借助于认知无线电技术,可保证发送信号满足FCC的UWB频谱规划,避免与其他传统窄带系统干扰。仿真结果表明该脉冲设计方法能够有效的抑制窄带干扰,并降低复杂度。A new frequency coded orthogonal UWB pulse design method based on orthogonal carriers and PN （Pseudo Noise） sequence is presented, in which the frequency-shifted sub-pulses are coded with PN sequence in frequency domain, thus generating the orthogonal pulses. The orthogonal carriers and PN codes are introduced into IR-UWB （Impulse Radio UWB）, the method not only has the advantages of both the traditional IR-UWBand Multi-banded CB-UWB （Carrier Based UWB）, but also improves the efficiency of the instantaneous spectrum and energy of the transmitting UWB signal. Furthermore, the Auto-correlation and Cross-correlation characteristics of the proposed pulses are better than those of conventional pulses. In addition, by the aid of Cognitive Radio technology, the transmitting signal can be guaranteed in accordance with FCC spectral mask and coexistence, and in avoidance of interference with other traditional narrow band system. And simulation result shows that the proposed pulse could reduce the effect of narrow-band interference on UWB system, including complexity.

关 键 词：冲激无线电 多频带UWB 认知无线电 干扰抑制 

分 类 号：TN914.2[电子电信—通信与信息系统]