资源简介
使用PTS方法降低PAPR,子载波数为128,4倍过采样,并将原始信号与PTS后的CCDF曲线进行比较。
代码片段和文件信息
% PTS方法的CCDF曲线 pts_ccdf.m
clear all;
close all;
n1=10;
c1=128;
v=8;
Fs=10^3;
NN=0:.1:13; % CCDF的门限值
ccdf0=zeros(1131);
ccdf2=ccdf0;
for m=1:n1;
% generate QAM signal
x(:1)=randsrc(c11[1-13-3]);
x(:2)=randsrc(c11[1-13-3]);
y=squeeze(x);
x1=amodce(yFs‘qam‘);
y1=x1.‘;
% oversample 4
z1=[y1(1:c1/2)zeros(13*c1)y1(c1/2+1:c1)];
z2=ifft(z1)*c1;
x0=abs(z2).^2;
v3=max(x0);
m3=mean(x0);
papr3(m)=10*log10(v3/m3);
l1=length(z1);
% divided into v sets
x2=zeros(1l1);
x4=x2;
x6=x4;
b=ones(1v);
for k=1:v;
z(k:)=[zeros(1(k-1)*l1/v)z1((k-1)*l1/v+1:k*l1/v)zeros(1(v-k)*l1/v)];
iz(k:)=ifft(z(k:));
iz(k:)=iz(k:)*c1;
x2(1:)=x2(1:)+b(k)*iz(k:);
end
x3=abs(x2).^2;
m0=mean(x3);
v0=max(x3);
papr0(m)=10*log10(v0/m0);
index=1;
while index b(index)=-1;
for n=1:v;
x4(1:)=x4(1:)+b(n)*iz(n:);
end
x5=abs(x4).^2;
m1=mean(x5);
v1=max(x5);
papr1(m)=10*log10(v1/m1);
if papr1(m) papr0(m)=papr1(m);
else
b(index)=1;
end
index=index+1;
end
for l=1:131;
if papr3(m)>NN(l);
ccdf0(l)=ccdf0(l)+1;
end
if papr0(m)>NN(l);
ccdf2(l)=ccdf2(l)+1;
end
end
end
ccdf1=ccdf0./n1;
ccdf3=ccdf2./n1;
% NN=4:.5:10;
semilogy(NNccdf1NNccdf3‘b-*‘);
xlabel(‘PAPR门限值/dB‘); ylabel(‘CCDF‘);
legend(‘原始信号‘‘PTS后‘0);
title(‘PTS方法的CCDF曲线‘);
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 1729 2010-05-07 21:25 pts_ccdf.m
----------- --------- ---------- ----- ----
1729 1
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