Week 14 Matlab project, ELEN420/Prof. Kraimeche In this assignment, we use Matla

Question

Week 14 Matlab project, ELEN420/Prof. Kraimeche

In this assignment, we use Matlab to plot basic digital signal pulses: NRZ polar, RZ polar, half-sinusoid polar, and raised-cosine, and generate eye diagrams. The Matlab programs to be used are given on page 437 of the textbook. Run the Matlab programs to generate and plot:

NRZ, RZ, half-sinusoid, and raised cosine pulses

The eye diagrams for the 4 types of pulses above

The original Matlab programs are reproduced below:

% (pnrz.m)

% generating a rectangular pulse of width T

% Usage function pout=pnrz(T);

function pout=prect(T);

% ----------------------------------------------------

% (prz.m)

% generating a rectangular pulse of width T/2

% Usage function pout=prz(T);

function pout=prz(T);

pout=[zeros(1,T/4) ones(1,T/2) zeros(1,T/4)];

% -------------------------------------------------------

% (psine.m)

% generating a sinusoid pulse of width T

function pout=psine(T);

% --------------------------------------------------------

% (prcos.m)

function y=prcos(rollfac,length, T)

% rollfac = 0 to 1 is the rolloff factor

% length is the onesided pulse length in the number of T

% length = 2T+1;

% T is the oversampling rate

y=rcosfir(rollfac, length, T,1, ’normal’);

% -------------------------------------------------------------

% (binary_eye.m)

% generate and plot eyediagrams

data = sign(randn(1,400));% Generate 400 random bits

dataup=upsample(data, Tau); % Generate impulse train

ynrz=conv(dataup,pnrz(Tau)); % Non-return to zero polar

yrcos=conv(dataup,prcos(0.5,Td,Tau)); % rolloff factor = 0.5

yrcos=yrcos(2*Td*Tau:end-2*Td*Tau+1); % generating RC pulse train

eye1=eyediagram(yrz,2*Tau,Tau,Tau/2);title(’RZ eye-diagram’);

eye2=eyediagram(ynrz,2*Tau,Tau,Tau/2);title(’NRZ eye-diagram’);

eye3=eyediagram(ysine,2*Tau,Tau,Tau/2);title(’Half-sine eye-diagram’);

eye4=eyediagram(yrcos,2*Tau,Tau); title(’Raised-cosine eye-diagram’);

Program codes for Matlab and Include Plots

Explanation / Answer

%h=[1 0 0 1 1 0 1 0 1 0]; %AMINRZ(h) clf; n=1; l=length(h); h(l+1)=1; ami=-1; while nn); else if ami==1 y=-(t==n); else y=(t==n); end end d=plot(t,y);grid on; title('Line code AMI NRZ'); set(d,'LineWidth',2.5); hold on; axis([0 length(h)-1 -1.5 1.5]); disp('zero'); else ami=ami*-1; if h(n+1)==0 if ami==1 y=(t

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