Title :
Performance analysis of adaptive filter structures based on subband decomposition
Author :
Petraglia, Mariane R. ; Mitra, Sanjit K.
Author_Institution :
Dept. of Electr. Eng., Catholic Univ. of Rio de Janeiro, Brazil
Abstract :
The properties of adaptive finite impulse response (FIR) filters in subbands are investigated, where the input signal is first decomposed in subband signals which are then modified at a lower rate by shorter adaptive filters. Two structures, with different coefficient adaptations, are studied. Expressions for the errors introduced by the nonideal characteristics of the filter banks are found, and a method for the optimal design of the analysis and synthesis banks for the adaptive filtering context is presented. The effect of the non-ideal filter bank characteristics in the adaptation speed of the multirate structures is investigated. The results of computer simulations considering an acoustic echo canceller application are presented
Keywords :
FIR filters; adaptive filters; digital simulation; echo suppression; filtering theory; teleconferencing; acoustic echo canceller; adaptation speed; adaptive filter structures; coefficient adaptations; filter banks; finite impulse response; multirate structures; nonideal characteristics; subband decomposition; subband signals; Adaptive filters; Band pass filters; Computational complexity; Convergence; Filter bank; Finite impulse response filter; Performance analysis; Prototypes; Signal analysis; Signal synthesis;
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.1993.393657
