Simplified adaptive algorithm for constrained notch filters with guaranteed stability |
| |
Authors: | Zhou J |
| |
Affiliation: | Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ.; |
| |
Abstract: | The stability issue in adaptive notch filters is investigated from a structural viewpoint. A new adaptive algorithm for direct frequency estimation is developed using a constrained pole-zero notch filter. The basic characteristic of this algorithm is that the notch filter is realised in a cascade form, with each stage implemented in a normal realisation. A simplified version of the gradient signals is derived, which makes the algorithm very efficient. It is shown that this proposed adaptive notch filter is bounded-input-bounded-output stable. Numerical examples with simulations, where the proposed algorithm performs well in terms of convergence and guaranteed stability, are given to support the theoretical results |
| |
Keywords: | |
|
|