Ngày tải lên :
13/12/2013, 00:15
...
(19.2)
whereW(n)=[w
0
(n)w
1
(n)ÃÃÃw
L1
(n)]
T
isthecoefcientvector,X(n)=[x(n)x(n
1)ÃÃÃx(nL+1)]
T
istheinputsignalvector,d(n)isthedesiredsignal,e(n)istheerrorsignal,
andà(n)isthestepsize.
TherearethreemainreasonswhytheLMSadaptivelterissopopular.First,itisrelativelyeasyto
implementinsoftwareandhardwareduetoitscomputationalsimplicityandefcientuseofmemory.
Second,itperformsrobustlyinthepresenceofnumericalerrorscausedbynite-precisionarithmetic.
Third,itsbehaviorhasbeenanalyticallycharacterizedtothepointwhereausercaneasilysetupthe
systemtoobtainadequateperformancewithonlylimitedknowledgeabouttheinputanddesired
responsesignals.
c
1999byCRCPressLLC
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ASSP-29(3), 439–446, June 1981.
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IEEE Trans. Signal Processing,
41(9), 2811–2825, Sept. 1993.
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IEEE
Trans. Signal Processing,
42(6), 1352–1365, ... Signal
Processing,
4(3), 219–216, May-June 1990.
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ASSP-34(2),...