1.txt

psk调制源程序

n=1:8192;
m=1:128;x(n)=randint(1,8192,2);x=[x(n)]';
y(n)=zeros(1,8192);z(m)=zeros(1,128);
for n=1:8192
    for m=1:128
    if n==64*m-63
    z(m)=x(n);  
    if m==ceil(n/64)
        y([(64*m-63):(64*m)]')=z(m);
    end
end
end
end
n=1:8192;
rm2=y(n);
x2=rm2;
x0=cos(n.*0.1*1.6);
x1=cos(n.*0.1*1.6+pi);
x=x1.*x2+x0.*~x2;
figure(1)
subplot(2,1,1);plot(n,x2);title('基带信号');
axis([0,640,-0.2,1.2]);grid
subplot(2,1,2);plot(n,x);title('PSK已调信号');
axis([0,640,-1.2,1.2]);grid
bit_in = randint(1e3, 1, [0 1]);
data_in=-2*bit_in+1;
data_in1=repmat(data_in',20,1);%data_in'为data_in的共轭转置
for i=1:1e4
    data_in2(i)=data_in1(i);
end;
t=0:0.1:1e3-0.1;
f=0:0.1:1;
xrc=0.5+0.5*cos(pi*f);
data_in2_rc=conv(data_in2,xrc)/5.5;