for i = 2:length(x)
    if x(i) == 0
       len = len + 1;
    else
        if x(i-1) == 0
            pulses(1,ini) = start;
            pulses(2,ini) = len;
            ini = ini + 1;
            start = i;
            len = 0;
            previous_state = current_state;
        end
end
end