zoukankan      html  css  js  c++  java
  • 【转】成型滤波与匹配滤波的MATLAB实现

    转载自:https://blog.csdn.net/yuan1164345228/article/details/45919315

    Fd=1;  
    Fs=8;   
    Delay=3;   
    R=0.5;   
    [yf,tf]=rcosine(Fd,Fs,'fir/sqrt',R,Delay);  
    figure(1);
    plot(yf); grid;title('根升余弦滤波器时域波形')
    x=randint(100,1)*2-1;%原始输入信号为+1,-1码    
    xt=zeros(1,800);    
    xt(1:8:end)=x; %%插值后信号
    y1=filter(yf,tf,xt); %%成型滤波  
    y2=filter(yf,tf,y1); %%用与发送端相同的根升余弦匹配滤波
    yt=y2((size(yf)+1)/2:8:end);%%匹配滤波后抽取        
    figure(2);    
    stem(x(1:40)); grid;title('原始信号输出');
    figure(3);
    plot(y1(1:100));grid;title('成型信号输出');
    figure(4);
    plot(y2(1:100));grid;title('匹配滤波信号输出');
    figure(5);    
    stem(yt(1:40)); grid;title('抽取后信号输出') ;
    

      

    滤波器的截止频率是Fd/2;Fs/Fd是内插倍数;其频响可以由滚降系数和窗长(FIR阶数)确定。 
    delay * (Fs / Fd) * 2 + 1就是滤波器的阶数

  • 相关阅读:
    Mybatis专栏文章整理成册《Mybatis进阶》!!!
    Mybatis的几种传参方式,你了解吗?
    HDU 1890
    POJ 2186
    HDU 2896
    POJ 1322
    POJ 1276
    POJ 1208
    POJ 1189
    POJ 1178
  • 原文地址:https://www.cnblogs.com/waimen/p/9774730.html
Copyright © 2011-2022 走看看