Examples
Consider the Haar filter bank discussed in §11.3.3, for which
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(12.92) |
The paraconjugate of

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(12.93) |
so that
![]() |
(12.94) |
Thus, the Haar filter bank is paraunitary. This is true for any power-complementary filter bank, since when


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Polyphase Analysis of Portnoff STFT
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Properties of Paraunitary Filter Banks