intertry.m

多径信道下的ofdm仿真系统

load channel_es.mat channel_es
%channel_es1=[channel_es -0.257989244580412 + 0.0677937890616791i]
channel1=[];
M=100;
N=800;
coff=pi*M/N
channel2=zeros(length(channel_es),1)
for i=1:100
    channel=channel_es((i-1)*8+1)
    channel1=[channel1 channel]
end
t=(1:100)'
channel2=randn(size(t));
ts=linspace(1,100,800)'
tt=exp(-j*(ts(:,ones(size(t))) - t(:,ones(size(ts)))')*coff)
ys=sinc((ts(:,ones(size(t))) - t(:,ones(size(ts)))'))%.*tt
y=ys*channel1';
y1=interp(channel1,8)
subplot(311)
plot(abs(y))
subplot(312)
plot(abs(y1));
subplot(313)
plot(abs(channel_es));
err1=0
for j=1:800
    if (y(i)-channel_es(i))>20e-2
        err1=err1+1
    end
end
err2=0
for j=1:800
    if (y1(i)-channel_es(i))>17e-2
        err2=err2+1
    end
end
err3=0
for j=1:800
    if (y(i)-y1(i))>8e-2
        err3=err3+1
    end
end