thanku sir...only one output is not showing otherwise its worthy..
half of the progarm showing error
1 view (last 30 days)
Show older comments
clc clear
% Generation of bit pattern s=round(rand(1,25)); signal=[]; carrier=[]; t=[0:2*pi/119:2*pi] for k=1:25 if s(1,k)==0 sig=-ones(1,120); else sig=ones(1,120); end c=cos(t); carrier=[carrier c]; signal=[signal sig]; end subplot(4,1,1); plot(signal); axis([-100 3100 -1.5 1.5]); title('\bf\it Original Bit Sequence');
bpsk_sig=signal.*carrier; subplot(4,1,2); plot(bpsk_sig) axis([-100 3100 -1.5 1.5]); title('\bf\it BPSK Modulated Signal');
t1=[0:2*pi/9:2*pi]; t2=[0:2*pi/19:2*pi]; t3=[0:2*pi/29:2*pi]; t4=[0:2*pi/39:2*pi]; t5=[0:2*pi/59:2*pi]; t6=[0:2*pi/119:2*pi]; c1=cos(t1); c1=[c1 cc1c1c1c1c1c1c1c1 c1]; c2=cos(t2); c2=[c2 c2c2c2c2 c2]; c3=cos(t3); c3=[c3 c3c3 c3]; c4=cos(t4); c4=[c4 c4 c4]; c5=cos(t5); c5=[c5 c5]; c6=cos(t6);
spread_signal=[]; for n=1:25 c=randint(1,1,[1 6]); switch(c) case(1) spread_signal=[spread_signal c1]; case(2) spread_signal=[spread_signal c2]; case(3) spread_signal=[spread_signal c3]; case(4) spread_signal=[spread_signal c4]; case(5) spread_signal=[spread_signal c5]; case(6) spread_signal=[spread_signal c6]; end end subplot(4,1,3) plot([1:3000],spread_signal); axis([-100 3100 -1.5 1.5]); title('\bf\it Spread Signal with 6 frequencies');
freq_hopped_sig=bpsk_sig.*spread_signal; axis([-100 3100 -1.5 1.5]); title('\bf\it Frequency Hopped Spread Spectrum Signal');
figure,subplot(2,1,1) plot([1:3000],freq_hopped_sig); axis([-100 3100 -1.5 1.5]); subplot(2,1,2); plot([1:3000],abs(fft(freq_hopped_sig)));
2 Comments
Accepted Answer
Iman Ansari
on 13 Apr 2013
Edited: Iman Ansari
on 13 Apr 2013
Hi. you need to correct these lines:
c1=[c1 cc1c1c1c1c1c1c1c1 c1];
c2=cos(t2);
c2=[c2 c2c2c2c2 c2];
I edited it:
clc
clear
% Generation of bit pattern
s=round(rand(1,25));
signal=[];
carrier=[];
t=[0:2*pi/119:2*pi]
for k=1:25
if s(1,k)==0
sig=-ones(1,120);
else
sig=ones(1,120);
end
c=cos(t);
carrier=[carrier c];
signal=[signal sig];
end
subplot(4,1,1);
plot(signal);
axis([-100 3100 -1.5 1.5]);
title('\bf\it Original Bit Sequence');
bpsk_sig=signal.*carrier;
subplot(4,1,2);
plot(bpsk_sig)
axis([-100 3100 -1.5 1.5]);
title('\bf\it BPSK Modulated Signal');
t1=[0:2*pi/9:2*pi];
t2=[0:2*pi/19:2*pi];
t3=[0:2*pi/29:2*pi];
t4=[0:2*pi/39:2*pi];
t5=[0:2*pi/59:2*pi];
t6=[0:2*pi/119:2*pi];
c1=cos(t1);
c1=[c1 c1 c1 c1 c1 c1 c1 c1 c1 c1 c1 c1];
c2=cos(t2);
c2=[c2 c2 c2 c2 c2 c2];
c3=cos(t3);
c3=[c3 c3 c3 c3];
c4=cos(t4);
c4=[c4 c4 c4];
c5=cos(t5);
c5=[c5 c5];
c6=cos(t6);
spread_signal=[];
for n=1:25
c=randint(1,1,[1 6]);
switch(c)
case(1)
spread_signal=[spread_signal c1];
case(2)
spread_signal=[spread_signal c2];
case(3)
spread_signal=[spread_signal c3];
case(4)
spread_signal=[spread_signal c4];
case(5)
spread_signal=[spread_signal c5];
case(6)
spread_signal=[spread_signal c6];
end
end
subplot(4,1,3)
plot([1:3000],spread_signal);
axis([-100 3100 -1.5 1.5]);
title('\bf\it Spread Signal with 6 frequencies');
freq_hopped_sig=bpsk_sig.*spread_signal;
axis([-100 3100 -1.5 1.5]);
title('\bf\it Frequency Hopped Spread Spectrum Signal');
figure;
subplot(2,1,1)
plot([1:3000],freq_hopped_sig);
axis([-100 3100 -1.5 1.5]);
subplot(2,1,2);
plot([1:3000],abs(fft(freq_hopped_sig)));
0 Comments
More Answers (0)
See Also
Categories
Find more on Lighting, Transparency, and Shading in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!