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
![$ y_k(n)$](http://www.dsprelated.com/josimages_new/sasp2/img1599.png)
![$ k$](http://www.dsprelated.com/josimages_new/sasp2/img49.png)
![$ N$](http://www.dsprelated.com/josimages_new/sasp2/img61.png)
![]() |
(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