Title :
On the performance analysis of the subband adaptive digital filter
Author :
Yang, Yoon Gi ; Cho, Nam Ik ; Lee, Sang Uk
Author_Institution :
Dept. of Control & Instrum. Eng., Seoul Nat. Univ., South Korea
Abstract :
A performance analysis of the subband adaptive digital filter (SBADF) is presented, and some examples are given which show that SBADF yields better convergence properties than the full band adaptive digital filter (FBADF). The optimum filter in the subband and the relationship between the transfer function of the SBADF and that of the FBADF after convergence are derived. The error surface of the SBADF is derived and compared with that of the FBADF. The autocorrelation functions of signals in the subband are derived, from which the convergence behavior of the filter coefficients and mean square error can be examined. Computer simulation results show that the analysis presented is in close agreement with the experiment. It is shown that the SBADF provides better convergence properties than the FBADF in the case of adaptive line enhancer (ALE) and adaptive channel equalizer for severely distorted channels
Keywords :
adaptive filters; band-pass filters; convergence of numerical methods; correlation methods; digital filters; transfer functions; SBADF; adaptive channel equalizer; adaptive line enhancer; autocorrelation functions; convergence behavior; convergence properties; error surface; filter coefficients; mean square error; performance analysis; severely distorted channels; subband adaptive digital filter; transfer function; Autocorrelation; Computer errors; Computer simulation; Convergence; Digital filters; Equalizers; Line enhancers; Mean square error methods; Performance analysis; Transfer functions;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.393658
