| Paper: | SPTM-P4.5 | ||
| Session: | Adaptive Filters I | ||
| Time: | Wednesday, May 19, 13:00 - 15:00 | ||
| Presentation: | Poster | ||
| Topic: | Signal Processing Theory and Methods: Adaptive Systems & Filtering | ||
| Title: | FACTORIZED ALL-PASS IIR ADAPTIVE NOTCH FILTERS | ||
| Authors: | Juan Cousseau; Universidad Nacional del Sur | ||
| Pedro Doñate; Universidad Nacional del Sur | |||
| Yaohui Liu; Helsinki University of Technology | |||
| Abstract: | A new family of IIR adaptive notch filters is presented. The family proposed is based on a second-order factorization of the all-pass transfer function that forms the multiple notch filter.These realizations represent an extension of a previous ad-hoc scheme for adaptive notch filtering, that avoid a high-order polynomial root finding in order to obtain the unknown frequencies of interest. An interesting aspect related to these novel algorithms is the fact that they introduce a different compromise between bias and SNR if compared with previous realizations available in the literature. Specifically, lower bias than in other approaches for low SNR can be achieved using the new realizations. This property is particularly attractive for multiple sinusoids estimation and tracking. In addition to the algorithm presentation, a discussion of the different properties and characteristics (stationary points, convergence) is also included. Also, computer simulations are presented in order to illustrate the expected performance of the adaptive filters proposed. | ||
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