Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications

Detection-Guided Fast Affine Projection Channel Estimator for Speech Applications

Blog Article

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 Washer Dryer Fan Motor 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 Camellia 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.