This paper introduces a class of oversampled complex-modulated causal IIR filter banks for flexible frequency-band reallocation networks. In the simplest case, they have near perfect magnitude reconstruction (NPMR), but by adding a phase equalizer they can achieve near-PR.
['Linnea Rosenbaum', 'Håkan Johansson', 'Per Löwenborg']
Oversampled complex-modulated causal IIR filter banks for flexible frequency-band reallocation networks