Cascaded-parallel adaptive notch filter based on orthogonal decomposition

Author

Liu, Yanbing ; Diniz, P.S.R. ; Laakso, T.I.

Author_Institution

Signal Process. Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

4

fYear

2003

fDate

25-28 May 2003

Abstract

In this paper, rational orthogonal basis functions are introduced to realize cascaded-parallel structure of adaptive notch filters (ANF) in the case of identifying and separating multiple sinusoids from wideband signals. The structural orthogonality provides good tradeoff between convergence speed and computational complexity. A simplified mean square output error (MSOE) updating algorithm is derived for the cascade-parallel realization. Simulation results confirm that the proposed structure converges faster compared with the cascade realizations with the same computational complexity.

Keywords

IIR filters; adaptive filters; cascade networks; convergence of numerical methods; frequency estimation; lattice filters; matrix decomposition; mean square error methods; notch filters; rational functions; cascaded-parallel adaptive notch filter; computational complexity; convergence speed; frequency estimates; multiple sinusoid separation; orthogonal decomposition; rational orthogonal basis functions; second-order based orthogonal adaptive IIR filter; second-order lattice notch filter; simplified mean square output error updating algorithm; simulation results; structural orthogonality; wideband signals; Adaptive filters; Bandwidth; Computational complexity; Convergence; Frequency estimation; Interference; Lattices; Narrowband; Signal processing; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on

Print_ISBN

0-7803-7761-3

Type

conf

DOI

10.1109/ISCAS.2003.1205867

Filename

1205867