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Partial spectrum reconstruction using digital filter banks

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1 Author(s)
Nguyen, T.Q. ; MIT Lincoln Lab., Lexington, MA, USA

The problem of reconstructing a part of the spectrum is reduced to designing the filter bank to satisfy a set of conditions. For the case considered here, these conditions cannot be satisfied simultaneously, so perfect reconstruction is not possible. The necessary and sufficient conditions on the filters so that the resulting filter bank cancels most alias components are found. Such filter banks are called partial alias cancellation filter banks. The product of the polyphase transfer matrices of these filter banks must be a block pseudocirculant matrix. An algorithm design procedure is discussed, and examples are given to demonstrate the theory

Published in:

Signal Processing, IEEE Transactions on  (Volume:41 ,  Issue: 9 )

Date of Publication:

Sep 1993

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