easy, I do at least know that much about what squaring is ;) 

2017-03-23 19:27 GMT-03:00 Christof Ressi <christof.ressi@gmx.at>:

F(1) (= the sum after a full period) is 0.5. That's the reason why the Hanning window in this case is twice as large to bring the sum to 1. weighting a constant(!) signal with such a Hanning window will yield the same sum as with a non-weighted signal.

thanks for trying again,I figured something like that happened, but I still can't get my head around the math ;) - I'll just be happy knowing it works for some reason... haha