一种新的自适应窄带干扰抑制在直扩超宽带系统中的应用  

A Novel Adaptive Narrowband Interference Mitigation Scheme for DS-UWB Systems

作　　者：梁中华[1] 朱世华[1] 王绍鹏[1] 

机构地区：[1]西安交通大学电子与信息工程学院,西安710049

出　　处：《电子与信息学报》2006年第10期1842-1845,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60372055);国家"863"项目(2003AA123320);博士点基金(20020698024;20030698027)资助课题

摘　　要：基于目标函数的最优化问题与求解线性方程组的等价性,该文针对直扩超宽带(DS-UWB)系统提出了一种新的自适应窄带干扰抑制方案。该方案把最优化模型转化为线性方程组的形式,并用一种有效的迭代方法即共轭梯度(ConjugateGradient,CG)算法来实现自适应滤波。理论分析及计算机仿真结果表明,与现有的窄带干扰抑制方案相比,该文提出的方案具有更高的性价比,因此在低功耗、低成本及简易实用的室内超宽带应用场合,适合作为一种可选的折衷方案。An adaptive NarrowBand Interference （NBI） suppression approach is proposed for DS-UWB systems. Based on the equivalence between the objective function optimization and linear equations, the proposed scheme translates the optimization model into linear equations and then performs adaptive filtering by employing an effective iterative method for linear equations, namely Conjugate Gradient （CG） algorithm. Theoretical analysis and simulation results show that, compared with the traditional NBI mitigation schemes, the proposed scheme can achieve a superior performance-to-cost ratio, and therefore can be considered as a compromised candidate for low cost, low power consumption and low complexity indoor UWB application scenarios.

关 键 词：超宽带(UWB) 窄带干扰(NBI) 自适应滤波 共轭梯度(CG) 

分 类 号：TN92[电子电信—通信与信息系统]