IX European Signal Processing Conference ( EUSIPCO - 98 ) , Sept . 1998 , Rhodes , Greece , pp . 1245 - 1248 PERFORMANCE LIMITATIONS OF SUBBAND ADAPTIVE FILTERS
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چکیده
In this paper, we e v aluate the performance limitations of subband adaptive lters in terms of achievable nal error terms. The limiting factors are the aliasing level in the subbands, which poses a distortion and thus presents a l o wer bound for the minimum mean squared error in each subband, and the distortion function of the overall lter bank, which in a system identiication setup restricts the accuracy of the equivalent fullband model. Using a generalized DFT modulated lter bank for the subband decomposition, both errors can be stated in terms of the underlying prototype lter. If a source model for coloured input signals is available, it is also possible to calculate the power spectral densities in both subbands and reconstructed fullband. The predicted limits of error quantities compare favourably with simulations presented.
منابع مشابه
IX European Signal Processing Conference ( EUSIPCO - 98 ) , Sept . 1998 , Rhodes , Greece , pp . 1245 - 1248 PERFORMANCE LIMITATIONS OF SUBBANDADAPTIVE
PERFORMANCE LIMITATIONS OF SUBBAND ADAPTIVE FILTERS S. Wei , R.W. Stewart Signal Processing Division, Dept. of EEE University of Strathclyde Glasgow G1 1XW, Scotland fweiss,[email protected] A. Stenger, R. Rabenstein Lehrstuhl f ur Nachrichtentechnik Universit at Erlangen-N urnberg Erlangen, Germany fstenger,[email protected] ABSTRACT In this paper, we evaluate the p...
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