rrc_rom.m

全数字调制解调器设计的matlab程序 有CIC FIR等滤波器

%按照纯查表，不作简化的方式作发送滤波器的改进型，可以减少一半的存储器使用量。
%BY YEGANHUA 
%REV. 2004-4-4
clc;
clear;
load D:\叶琻化\数字滤波器设计实例\Matlab\rrc12bit.mat;

for i=1:2^8
    x(i,:)=de2bi(i-1,8);
    for j=1:8
        y(i,j)=x(i,9-j);        
        if y(i,j)==0
        end;            
            y(i,j)=-1;
    end;
end;

for i=1:8
    h1(i)=rrc12bit((i-1)*8+1);
    h2(i)=rrc12bit((i-1)*8+2);
    h3(i)=rrc12bit((i-1)*8+3);
    h4(i)=rrc12bit((i-1)*8+4);
end;

for i=1:2^8
    s1(i)=sum(h1.*y(i,:));
    s2(i)=sum(h2.*y(i,:));
    s3(i)=sum(h3.*y(i,:));
    s4(i)=sum(h4.*y(i,:));
end;

for i=1:2^8
    s(i*4-3)=s1(i);
    s(i*4-2)=s2(i);
    s(i*4-1)=s3(i);
    s(i*4)=s4(i);
end;

s=s/max(s);

s=round(s*(2^7-1));
for i=1:length(s)
    if s(i)<0
        s(i)=2^8+s(i);
    end;
end;

j=0:length(s)-1;
j_s=[j;s];
fid = fopen('dsssrrc.txt','w');
fprintf(fid,'%5d: %5d;\n',j_s);
fclose(fid);