function [x,t] = GeraSinal(N,Ta)

t = [0 : (N-1)]*Ta;
phi = (random('normal',0,pi,N,1));
phi_i1 = zeros(N,1);

for n=2:N
       phi_i1(n) = phi_i1(n-1) + (phi(n)+phi(n-1))*Ta/2;
end

phi = (random('normal',0,pi,N,1));
phi_i2 = zeros(N,1);

for n=2:N
       phi_i2(n) = phi_i2(n-1) + (phi(n)+phi(n-1))*Ta/2;
end


% o sinal ruido e gerado pela funcao
x = 0.5*sin(20*pi*t + 10*phi_i1) + 0.5*sin(24*pi*t + 10*phi_i2);

plot(t,x)

end