Izvorni znanstveni članak
Adaptive System for Engine Noise Cancellation in Mobile Communications
Georgi Iliev
Karen Egiazarian
Sažetak
An adaptive system, which provides engine noise cancellation for hands-free cellular phones is developed. The system employs a cascade of three second-order adaptive notch/bandpass filters based on Gray-Markel lattice structure. This structure defines the high stability of the adaptive system. A Newton type algorithm is used for updating the filter coefficients that determines fast adaptation. In addition a new algorithm using adaptive filtering with averaging (AFA) is developed. The main advantages of AFA algorithm could be summarized as follows: high convergence rate comparable to that of the recursive least squares (RLS) algorithm and at the same time low computational complexity. The presented adaptive system for engine noise cancellation could improve considerably the speech intelligibility of hands-free cellular phones.
Ključne riječi
adaptive algorithms; digital filters; noise reduction
Hrčak ID:
6818
URI
Datum izdavanja:
29.12.2004.
Posjeta: 2.351 *