matlab code for equation error method

[hol_jensen]

I want to design an equalizer for a channel the is IIR and with equation error method.can anyone help me with the matlab code for equation error method??? please i need it really soon and thank you in advance

 

[farzad_m]

heres what you want i hope u understand how it works,however if you're familiar with equation error concept you'll get it.and dont forget to press helped me button.

clc
clear all
iter=10000;delay=1;runs=100;
h=[0.25 1 0.25 ];
for r=1:runs
randn('state',sum(100*clock));
s=sign(randn(iter,1)); %Bpsk modulated symbol sequence
u0=filter(h,1,s);%channel output
x=u0+sqrt(0.01)*randn(iter,1);%equalizer input
%.........LMS algorithm for equation error method...........
mau=0.001;
w=zeros(3,1);
d=[zeros(delay,1); s(1:iter-delay)];
for n=2:iter
u_e=[x ;x(n-1) ;d(n-1)];
y=w'*u_e;
e=d-y;
w=w+mau*e*u_e;
s_error(r,n-1)=e*conj(e);
end
end
fvtool([w(1) w(2)],[1 -w(3)]);
MSE=mean(s_error);
w_final=abs(w);
disp(' a0 a1 b1 ')
disp(w_final')
sim_error=mean(MSE(round(iter/2):iter-2))
semilogy(MSE)
ylabel('E[(output error)^2]')
xlabel('No.of iterations')

 

[radar99]

I want to design an equalizer for a channel the is IIR and with equation error method.can anyone help me with the matlab code for equation error method??? please i need it really soon and thank you in advance