Abstract: Signal processing of fractional sampling rate conversion is discussed in frequency spectrum.In order to meet the performance of realtime system，a polyphase structure based efficient implementation scheme of the fractional sampling rate converter is presented.Applying the converter to one dimensional signal sampling rate conversion，the simulation results show that the error between the output signal and its actual value is very small，demonstrating the validity of the proposed fractional polyphase converter.

摘要： 在频域上分析分数倍抽样率转换信号处理过程，为适用于实时系统，对其实现结构进行优化，给出一种高效的分数倍抽样率变换器多相结构优化实现方法，并将其应用于一维信号抽样率变换。仿真结果表明，抽样输出的一维序列信号与实际理想信号误差较小，所设计的分数抽样率变换器是有效可行的。