一种高性能内插滤波器的设计  

Design of a High Performance Interpolation Filter

作　　者：吴明钦 WU Mingqin(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2018年第3期350-355,共6页Telecommunication Engineering

摘　　要：在全数字接收机系统中,随着高阶调制解调技术的应用,传统内插滤波器的性能已不能满足要求。为此,通过研究一种多项式函数的频率响应,提出了一种高性能内插滤波器的设计方法。该方法在频域逼近的基础上,以线性加权的最小均方误差(MMSE)为优化准则,利用Matlab系统函数进行线性约束条件下的最优化迭代,设计非常灵活。仿真结果表明,该方法设计的内插滤波器性能明显优于常用的内插滤波器,尤其适合于高阶正交幅度调制(QAM)信号。The performances of traditional interpolation filters cannot meet the requirements with the development of high order modulation and demodulation technology in all digital receivers.Thus,a method for designing a high performance interpolation filter is proposed by researching the frequency responses of polynomial functions.This design is based on approximation in the frequency domain response.It is more flexible especially by using linear weighting Minimum Mean Square Error(MMSE)algorithm and optimization iterating under linear constraints by using Matlab own function.Simulation results show that the performances of interpolation filters designed by this approach are better than those of filters designed by traditional methods.It is particularly well suitable for the high order Quadrature Amplitude Modulation(QAM)signal.

关 键 词：全数字接收机 高阶正交幅度调制信号 内插滤波器 多项式插值 频域逼近 

分 类 号：TN919[电子电信—通信与信息系统]