摘要
为了解决超宽带与窄带系统共存问题,基于认知无线电的思想,采用Hermite矩阵特征向量方法和Ray-leigh信号提出了一种认知超宽带(UWB)正交脉冲序列设计方法,从而达到抑制窄带干扰的目的.分析了基于认知UWB脉冲序列的2PPM-TH和2PAM-TH UWB系统的抗多用户干扰以及窄带干扰性能.仿真结果表明,提出的自适应脉冲序列的功率谱密度分布符合FCC关于室内和室外UWB应用的频谱规范,可以实现任意频段陷波,具有灵活的认知避免能力;认知UWB脉冲序列具有较强的窄带干扰抑制能力.
By the aid of cognitive radio technology, a novel cognitive ultra-wideband (UWB) orthogonal pulses designing method based on the eigenvector of Hermite matrix and Rayleigh signal is presented for narrow band interference suppression. Simulation results show that the power spectral density (PSD) distribution of proposed adaptive UWB pulses can meet the FCC UWB indoor and outdoor spectral norms and realize adaptive spectral notches. Finally, through the analysis and simulation of suppressing multi-user interference (MUI) and narrow-band interference (NBI) in 2PPM-TH and 2PAM-TH UWB systems, it could be proved that the cognitive UWB pulses have predominant anti-interference performance.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2011年第5期583-588,共6页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(60772021)
国家"八六三"计划项目(2009AA01Z262)
国家科技重大专项资助项目(2009ZX03006-006/-009)