function gauss_t=Gauss_generator(c,f,theta,T_interval,T)

N=ceil(T/T_interval);
t=(0:N-1)*T_interval;
gauss_t=0;
for k=1:length(f);
    gauss_t=gauss_t+c(k)*cos(2*pi*(f(k)*t+theta(k)));
end