matlab cic滤波器实现

您可以使用以下的MATLAB程序来实现CIC滤波器的信号抽取：

% 设计5级的CIC滤波器
R = 2; % 抽取率
M = 5; % 滤波器级数
L = R^M; % 累积数
N = 1000; % 输入信号的长度

% 生成输入信号
x = randn(1, N);

% 初始化滤波器的累积器
y = zeros(1, N);

% CIC滤波器的实现
for n = 1:N
    y(n) = sum(x(1:n)) / L; % 对输入信号进行累加并除以累积数
end

% 绘制输入信号和滤波后的输出信号
subplot(2,1,1);
plot(x);
title('输入信号');
subplot(2,1,2);
plot(y);
title('滤波后的输出信号');

这个程序实现了一个5级的CIC滤波器，采样速率在积分器之后降低。您可以根据需要修改参数和输入信号来进行实验和验证。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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