基于FPGA的FIR滤波器的误差分析

Error analysis of FIR filter based on FPGA

数字滤波器作为数字信号处理技术的重要组成部分之一,已广泛应用于信号分离、恢复、整形等重要场合。在工程实践中,往往要求对信号处理要有实时性和灵活性,而基于FPGA的FIR滤波器因其严格的线性相位和简单的设计步骤而应用广泛。本文不仅对基于FPGA设计的FIR滤波器进行了简单的误差分析,包括绝对误差与相对误差分析;而且还做出了该滤波器的频谱,通过与MATLAB中仿真出的频谱进行比较分析,验证了该滤波器在工程应用中是适应的,满足了设计的要求。

As one of the important components of digital signal processing technology,digital filter has been widely applied to separation,recovery,and plastic,and other important occasions.In engineering practice,often required to signal processing to have real-time and flexibility,and based on FPGA FIR filters are wide application for its strict linear phase and simple design procedure.This paper not only based on FPGA design of FIR filters simple error analysis,including the absolute error and relative error analysis,But also made the filter of spectrum,with MATLAB simulation through the comparison and analysis of spectrum,and verified the filter in engineering application is adaptive to meet the design requirements.