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Example: Polyphase Analysis of the Weighted Overlap Add Case: 50% Overlap, Zero-Padding, and a Non-Rectangular Window

We may convert the previous example to a weighted overlap-add (WOLA) (§8.6) filter bank by replacing each $ w(m)$ by $ \sqrt{w(m)}$ and introducing these gains also between the $ \hbox{\sc IDFT}$ and upsamplers, as shown in Fig.11.27.

Figure 11.27: Polyphase representation of STFT using Weighted OverLap Add (WOLA).
\includegraphics[width=\twidth]{eps/polyNchanWinZPWOLA}

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Example: Polyphase Analysis of the STFT with 50% Overlap, Zero-Padding, and a Non-Rectangular Window