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Discussion Groups | Echo Cancellation | Help for roles in LMS algo

Technical discussions about echo cancellation and adaptive filtering in general.

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Help for roles in LMS algo - hyee...@yahoo.com.cn - Dec 12 14:28:13 2008

I am implementing a LMS adptive filter denoising system. And I got a noisy
signal A, and also a noise signal B.  The B is corrected with noise of noisy
signal A.

y(n) = conj(W)* U(n);
e(n) = d(n) - y(n);
W(n+1) = W(n)+mu*U(n)*conj(e(n)) ï¼

1. Which signal should act as main input signal U,and which should act as the
desired signal D?  noisy or noise? why?  can I exchange their roles?  Please
tell the principle.

2. Which is the result,the denoised speech signal? e or y? Why?

cheers
hyeewang

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Re:Help for roles in LMS algo - mossi idrissa moctar - Dec 15 13:03:27 2008

I'm not sure that I understand what you mean.
I think that:
A :should be your input (B+noise).
B : your reference.
e: is your error use for updating your filter.
y : your output.
Maybe you could try a Wiener filter.
Moc
Cordialement
MOSSI IDRISSA Moctar
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