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Improving the near-perfect hybrid filter bank performance in the presence of realization errors

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4 Author(s)
M. A. A. Pinheiro ; Dept. of Electr. Eng., COPPE, Rio de Janeiro, Brazil ; P. B. Batalheiro ; A. Petraglia ; M. R. Petraglia

Hybrid filter banks have received increasing attention in the literature, for applications such as high-speed, high-resolution A/D and D/A converter design. In the manufacturing process, however, the, filter coefficients of a hybrid filter bank are plagued with some errors due to technological limitations, particularly those of the analog filters, leading to degradation of the system performance. This work presents a novel method for improving the mean signal-to-noise-ratio of near-perfect reconstruction filter banks, taking into account such realization errors. The method consists in minimizing the total noise energy derived in an accurate way by a theoretical expression

Published in:

Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on  (Volume:2 )

Date of Conference:

2001