Inverse DFT and the DFT Filter Bank Sum
The Length inverse DFT is given by [264]
(10.16) |
This suggests that the DFT Filter Bank can be inverted by simply remodulating the baseband filter-bank signals , summing over , and dividing by for proper normalization. That is, we are led to conjecture that
(10.17) |
This is in fact true, as we will later see. (It is straightforward to show as an exercise.)
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DFT Filter Bank