I have developed my own window function for pre-processing signals prior to a DFT (FFT). How do I measure the performance of the window so that I can specify how good (or bad) it is? Maybe other people would be interested in the window but only if I can quantify its performance I think.
If I can give an example... When I use a Blackman Harris window on a pure dc synthetic signal using a 48,000 sample DFT (with 1Hz resolution), the Blackman Harris window measures around 4dB below for the 1Hz bin. A Hanning window output is around 6dB down. My window gives a 1Hz bin value of around -170dB.