Scicos Diagram
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Integrated diagram of base band QPSK transmission chain

\epsfig{file=qpsk_teb_int_diagr.eps,width=400pt}

Module


Contents

Context 


Te       = 0.1;
Nu       = 128;
Nech     = 15;
N        = Nu*Nech;
Nbit     = 2;
nb_coef  = 127;  
r        = 0.35; 
fe       = Nech; 
gain_em  = 1; 
gain_rec = 1/Nech; 
p        = filter_tap(1,nb_coef,Nech,r,1);
m1       = 2^(int(log(N+nb_coef-1)/log(2))+1);
Nb_vec   = 3; 
nb_event = 3
Tfin     = Te*Nb_vec;
sigma    = 0.2;

Scope Results

\begin{figure}\begin{center} \epsfig{file=qpsk_teb_int_scope_1.eps,width=330.00pt} \end{center}\end{figure}
Figure : (a) Eye diagram before the AWGN channel.

\begin{figure}\begin{center} \epsfig{file=qpsk_teb_int_scope_2.eps,width=330.00pt} \end{center}\end{figure}
Figure : (b) Eye diagram after the AWGN channel.

Used blocks

Authors

A. Layec