基于认知无线电的超宽带系统中窄带干扰抑制技术  

Narrowband interference suppression in UWB system based on cognitive radio theory

作　　者：周刘蕾[1] 朱洪波[1] 张乃通[2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]哈尔滨工业大学电子与信息技术研究院,黑龙江哈尔滨150001

出　　处：《通信学报》2008年第3期135-140,共6页Journal on Communications

基　　金：国家自然科学基金重点资助项目(60432040);国家自然科学基金资助项目(60572024);教育部博士点基金资助项目(20050293003)~~

摘　　要：基于认知无线电的思想,在满足联邦通信委员会(FCC)频谱限制的基础上,提出一种能避开多个无线电台工作频段的UWB脉冲波形设计算法,从而达到抑制窄带干扰的目的。仿真结果表明,提出的脉冲比通常使用的Scholtz脉冲的性能更优,抗干扰能力更强。且此方法不需要在整个频段内降低UWB脉冲的功率谱密度,为提高UWB脉冲发射功率,增大UWB系统的通信距离,提供了一种灵活易行的方案。A novel adaptive UWB pulse shaping algorithm was presented for producing the expected spectral notches right in the frequency band occupied by the nearby wireless devices. Simulation results show that the proposed UWB waveform has a better single-link BER performance in AWGN channel and stronger anti-jamming abilities than other conventional waveforms such as Scholtz＇s monocycle, etc. Besides, the power spectral density of UWB pulse does not need to be reduced over the whole frequency band. Therefore, it is possible to expand the communication range of UWB systems by increasing the transmitted power of UWB pulse.

关 键 词：认知超宽带无线电 频谱感知 脉冲波形设计 干扰抑制 

分 类 号：TN929.5[电子电信—通信与信息系统]