J. Benesty et al., A MULTICHANNEL AFFINE PROJECTION ALGORITHM WITH APPLICATIONS TO MULTICHANNEL ACOUSTIC ECHO CANCELLATION, IEEE signal processing letters, 3(2), 1996, pp. 35-37
A straightforward generalization of the so-called affine projection al
gorithm (APA) to the multichannel (MC) case is easily obtained. Howeve
r, due to the strong correlation between the input signals of the vari
ous channels, the resulting algorithm converges very slowly. This lett
er describes the way to overcome this problem and derives an efficient
algorithm that turns out to make use of additional orthogonal project
ions.