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- Title
Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications.
- Authors
Jennifer, Yan Wu; Homer, John; Rombouts, Geert; Moonen, Marc
- Abstract
In various adaptive estimation applications, such as acoustic echo cancellation within teleconferencing systems, the input signal is a highly correlated speech. This, in general, leads to extremely slow convergence of the NLMS adaptive FIR estimator. As a result, for such applications, the affine projection algorithm (APA) or the low-complexity version, the fast affine projection (FAP) algorithm, is commonly employed instead of the NLMS algorithm. In such applications, the signal propagation channel may have a relatively low-dimensional impulse response structure, that is, the number m of active or significant taps within the (discrete-time modelled) channel impulse response is much less than the overall tap length n of the channel impulse response. For such cases, we investigate the inclusion of an active-parameter detection-guided concept within the fast affine projection FIR channel estimator. Simulation results indicate that the proposed detection-guided fast affine projection channel estimator has improved convergence speed and has lead to better steady-state performance than the standard fast affine projection channel estimator, especially in the important case of highly correlated speech input signals.
- Subjects
ESTIMATION theory; ECHO suppression; ALGORITHMS; GRAPHICAL projection; COMPUTATIONAL complexity; SIMULATION methods &; models
- Publication
EURASIP Journal on Audio Speech & Music Processing, 2007, Vol 2007, p1
- ISSN
1687-4714
- Publication type
Article
- DOI
10.1155/2007/71495