一种改进型整数倍多相滤波器在FPGA中的应用

在现代通信系统中,到处都有数字信号处理（DSP）的应用。DSP设计人员的主要工具之一是有限脉冲响应（FIR）滤波器。为提高系统性能要求,所需要的FIR滤波器系数越多（有大量的抽头）,当然滤波器的响应也越好。由于大量的抽头增加了对逻辑资源的需求、增加了计算的复杂性,增加了功耗。在多速率信号处理系统中,特别是高倍数的抽取和...

A Improved Integral Polyphase Filter Application in FPGA

In modern communication system,digital signal processing is applied in many aspects.FIR filter is one of the main tools which DSP designer used.In order to enhance the system performance,the FIR filter order has to be increased to get the better frequency response.With the increasement of filter orders,the amount of logical resources,the complexity of arithmetic and power dissipations are also increased.In multirate signal processing system,specially in high filter orders application used in interpolation and decimation,it＇s a really challenge to realize a DSP system in FPGA.The resampling filter using the polyphase form can achieve the same performance levels as the prototype FIR filter but using less logical resource,more simple arithmetic and less power disspation.Taking advantage of the special DSP architecture in Spartan6 and using the polyphase form and symmetry filter coefficient simultaneity,the modified polyphase filter can consume less resource then prototype polyphase filter to get the same performance.