[sim, EstMean, EstSigma] = ld_WindowedMean(sim, events, in, weight, WindowLen)
ld_WindowedMean - Calculte the average of the input singal for a floating window
in * - input signal
weight * - weight for the current sample
EstMean * - the calculated average
EstSigma * - the calculated standard deviation
WindowLen - length of floating window
If weight is less than 0 the filter update is prevented. E.g. if in contains an invalid sample that
shall not be counted in the calculation of the Mean and Variance