GPS信号模拟器中x/sin(x)数字滤波器的设计和实现

Design and Implementation of x/sin(x)Digital Filter in A GPS Signal Simulator System

结合一个实际 GPS信号模拟器数字中频系统的指标要求 ,介绍用 matlab设计窄带 x/sin( x)数字滤波器的方法 ,并在 Xilinx公司的 FPGA中实现所设计的 7阶 FIR滤波器 ,所设计的滤波器输出延迟为 8个时钟周期 ,后仿真的最高速度大于 1 2 0

A narrow band FIR digital filter for compensating the x/sin(x) spectrum distortion occurring in D/A converters has been designed with the help of matlab.This filter was designed according to the requirement of a GPS signal simulator system.The designed 7-tap filter was implemented in a Xilinx's FPGA.The simulation results show that the sampling rate could be over 120MHz,and the latency of the filter was only 8 clock cycles.