Length L FIR Frame Filters
To avoid time aliasing, we restrict the filter length to a maximum of samples. Since is an arbitrary multiplicative weighting of the th spectral frame, the frame filter need not be causal. For odd , the filter impulse response indices may run from to , where
(9.43) |
This gives
This is the general length time-varying FIR filter convolution sum for time , when is odd.
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