基于多相滤波的数字正交变换

Digital Orthogonal Transformation Based on Multiphase Filtering

对多相滤波法实现数字正交变换的原理进行详细的分析,用多相滤波器组中的子滤波器实现内插滤波器的设计。仿真结果表明,所设计的内插时延滤波器的相频特性和幅频特性均满足要求。最后,用所设计的多相滤波器实现了数字正交,成功的分解出了同相分量和正交分量,并校正了它们之间的延时,证明了该理论的可实施性。

This paper investigates the principle of the digital orthogonal transformation based on multiphase filtering,and proved that the interpolation delay filters could be replaced with branch filters from a multiphase filter according to the theory of multi-sampling rate signal processing.Simulation results demonstrate that the magnitude and phase response of the designed interpolation delay filters can meet the demands.The counteract design multiphase filter bank carried out a reality is used to successful decomposite the same phase and orthogonal components and corrected when they postpone,proving should can be carried out theoretically.