BPSK,QPSK demodulation code in matlab...Quite urgent plz..

Please share with me BPSK and QPSK mosulation and demodulation code if u have.
I need it quite urgent.
Thank you.

Re: BPSK,QPSK demodulation code in matlab...Quite urgent plz

Hi,

check this one, it include some code stuff

need help with designing QPSK modulator/demodulator

Does any one have code for MSK and the code for displaying the spectrum of BPSK,QPSK and MSK on a single figure???

Re: BPSK,QPSK demodulation code in matlab...Quite urgent plz

hanif said:

Hi,

check this one, it include some code stuff

need help with designing QPSK modulator/demodulator

Click to expand...

thanku...but its all in HDL...i want in MATLAB

Re: BPSK,QPSK demodulation code in matlab...Quite urgent plz

Searching for "qpsk simulink" etc in Matlab Central https://www.mathworks.com/matlabcentral/ gives several hits.

Re: BPSK,QPSK demodulation code in matlab...Quite urgent plz

clc;
clear all;
disp('M-Array ASK 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-ASK modulation to produce y
y=modulate(modem.qammod(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.qamdemod(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)
%%