FIR滤波器(实现) [英] FIR filter (implementation )

问题描述

我想制作一个FIR滤波器.我有一个系数数组(buffer [size])和一个数据数组(filter [size_filter]).我必须在两个数组之间进行卷积:

I want to make a FIR filter. I have an array of coefficients (buffer[size]) and an array of data (filter[size_filter]). I have to do a convolution between the two arrays:

for(j = 0;j < size+size_filter;j++)
{
  output[j] = 0;
  for(i = 0;i < size_filter;i++)
  {         
    output[j] += buffer[i]*filter[j-i];
  }
}

output [size + size_filter]是结果.我哪里错了?

output[size+size_filter] is the result. Where I'm wrong?

推荐答案

output[j] += filter[i]*buffer[j-i];

并确保j-i不会为负

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