Scicos Diagram
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Base band single user QPSK spread-spectrum transmission chain

\epsfig{file=qpsk_etal_teb_cos.eps,height=9cm}

Context


Te=0.1;
Nu=4;
Nbit=2;
l_g=5;
Nc=(2^l_g)-1;
ci_g1=[21;21];ci_g2=[13;10]
coef_g1=[9;9];coef_g2=[15;15]
nb_coef=127;
Nech=15;
N=Nu*Nc;
N1=N*Nech
r=0.35; 
fe=Nech; 
gain_em=1; 
gain_rec=1/Nech; 
pulse=zeros(1,1); 
t_Ts=1/fe*(-nb_coef/2:nb_coef/2-1); 
pulse = 4*r/%pi*(cos((1+r)*%pi*t_Ts) + (sin((1-r)*%pi*t_Ts)./(4*r*t_Ts)))./(1-(4*r*t_Ts).^2); 
Nb_vec=3; 
nb_event=4;
Tfin=Te*Nb_vec;
sigma=0.4;

 

Scope Results

\begin{figure}\begin{center}
\epsfig{file=qpsk_etal_teb_scope_1.eps,width=300.00pt}
\end{center}\end{figure}
Figure : Scope results

Mod_num blocks

Authors

IRCOM Group Alan Layec