Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/69007
Title: A piloted adaptive notch filter
Authors: Lim, Y.C. 
Zou, Y.
Zheng, N.
Issue Date: 2003
Source: Lim, Y.C.,Zou, Y.,Zheng, N. (2003). A piloted adaptive notch filter. ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings 6 : 193-196. ScholarBank@NUS Repository.
Abstract: In this paper, we propose a new adaptive system where the main zero of the notch filter is sandwiched between two piloted zeros. The gradient of the cost function provides information on the direction that the main zero should be steered towards the input sinusoid frequency. The piloted zeros are used to provide an indication on the distance between the frequency of the sinusoid and the zero location of the main notch filter. This information is used to control the adaptive step-size, for fast convergence if the frequency of the sinusoid is far away from the main zero of the notch and for small misadjustment if that distance is small. The technique is very effective for locking on frequencies, which are neither very close to dc nor very close to half sampling frequency. The complexity of the piloted filter is compatible to the conventional normalized LMS (NLMS) notch filter.
Source Title: ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
URI: http://scholarbank.nus.edu.sg/handle/10635/69007
ISSN: 15206149
Appears in Collections:Staff Publications

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