摘要
针对数字滤波的信号处理特点 ,将截短的滤波器冲击响应波形进行二维分解 ,得到滤波器的多相结构。通过对多相结构的分析 ,给出了一种较为精简实用的基于滤波器系数查询表模式的FPGA实现结构 ,该结构具有实现简单、占用资源少等特点。仿真结果表明 ,该结构完全可以达到实际应用的要求。
Accordingtothe signal processingcharaterisitics ofthe digitized filtering,the2-dimension decomposition forthe trunˉcated impulse response wave is made,and the poly-phase structure for the filter is derived By analyzing the poly-phase strucˉture,a simple and feasible structure implemented byFPGAis proposed,whichis based on the look-up table ofthe filter's coeffiˉcients.The structure has the advantages of simplicity in implementation and saving in hardware.The computer simulation results showthat the implementation method can meet the practical need.
