Lab Project of Digital Communication

[nayeem]

Write a Matlab code code to implement the BPSK modulation.

 

[ckshivaram]

its very simple.... just check help of Matlab you'll now what to do

or
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---------- Post added at 11:45 ---------- Previous post was at 11:43 ----------

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[nayeem]

please Write a Matlab code code to implement the BPSK modulation with which user can give input.

 

[ckshivaram]

clc;
clear all;
disp('M-Array PSK Modulation')
%create a random digital message
M=input ('M= '); %alphabet size
x=randint(input('Number of binary bit stream = '),1,M);

nsample=40; %oversampling rate.
%%

%%
%use M-PSK modulation to produce y
y=modulate(modem.pskmod(M),x);
%%
%follow with rectangular pulse shaping.
ypulse=rectpulse(y,nsample);
stem(y(1:10),'filled'),grid;
%%
%%transmit signal through an AWGN Channel
ynoisy=awgn(ypulse,input('SNR in dB = '),'measured');
%%
%Create scattet plot from noisy data
scatterplot(ynoisy),grid;
%%
%Downsample at the reciever.
ydownsample=intdump(ynoisy,nsample);
%%
%Demodulate ynoisy to recover the message.
z=demodulate(modem.pskdemod(M),ydownsample);
figure;
subplot(2,1,1);
stem(x(1:10),'filled'),grid;
subplot(2,1,2);
stem(z(1:10),'filled'),grid;
%%
%Check symbole erroe rate.
[num ty]=symerr(x,z)

this program written in matlab 2008, u need to run it on this version.

 

[nayeem]

I don't have Matlab 2008 version. Please send me the code Matlab 7 version.