基于高斯脉冲导函数的组合脉冲系数设计  

Coefficient design for combination pulse based on the Gaussian pulse derivatives

作　　者：杨娜[1] 颜彪[1] 刘敏[1] 张慧[1] 杨银霞[1] 

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《扬州大学学报（自然科学版）》2009年第1期40-43,共4页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省高校自然科学基金资助项目(07KJD510247)

摘　　要：超宽带信号的脉冲形成须使得波形逼近管理权威所制定的辐射掩蔽.为了设计满足频谱要求的脉冲,选取高斯导函数为基函数进行线性组合.分别利用随机系数选择和基于最小均方误差准则的系数选择选取组合系数,再依据美国通信委员会(FCC)室内频谱规范选择一组最佳系数.仿真结果表明,两种系数选择方法所得组合脉冲的功率谱密度均能较好地接近FCC室内频谱规范,且基于最小均方误差准则的系数选择能更好地逼近频谱规范,实现频谱资源的充分利用.Pulse shaping of the UWB signal makes the pulse waveform meet the emission mask ruled by the administration government. The derivatives of Gaussian pulse are used as base functions of the linear combination to design the pulse, which accords with the power spectrum density requirement. Two different approaches, such as random coefficient combination and the coefficient combination based on I.SE, are employed to choose the combination coefficients, the best combination coefficient is made certain according to the FCC UWB indoor spectral mask. The simulation results show that the power spectrum density of the combined pulses, which is obtained through two coefficient combination ways, approaches to the FCC UWB indoor spectral mask. Furthermore, the coefficient combination based on LSE has a better approaching effect and makes full use of the spectrum.

关 键 词：超宽带脉冲 高斯脉冲 组合脉冲 室内频谱规范 最小均方误差 

分 类 号：TN929.5[电子电信—通信与信息系统]