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

Authors:
M. A. A. Pinheiro;P. B. Batalheiro;A. Petraglia;M. R. Petraglia
Affiliations:
Dept. of Electr. Eng., COPPE, Rio de Janeiro, Brazil;-;-;-
Venue:
ICASSP '01 Proceedings of the Acoustics, Speech, and Signal Processing, 200. on IEEE International Conference - Volume 02
Year:
2001

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Wideband, bandpass, and versatile hybrid filter bank A/D conversion for software radio

IEEE Transactions on Circuits and Systems Part I: Regular Papers - Special section on 2008 custom integrated circuits conference (CICC 2008)

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Abstract

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.