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An efficient approach to noncausal filtering

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2 Author(s)
Chok-Ki Chan ; Chinese University of Hong Kong, Shatin, Hong Kong ; Chih-Fan Chen

A new method for designing digital noncausal filters is introduced. The design is based on well developed analog filter approximations and their Wiener-Lee decomposition forms. The resulting filter is linear phase in the passband and suitable for sample-by-sample processing. Comparing with conventional two-pass noncausal recursive filters, the proposed filter has the advantages of a small basic group delay and a small memory size requirement. Moreover, the magnitude and phase responses are exactly known.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:32 ,  Issue: 3 )