Asynchronous LMS adaptive equalization

doi:10.1016/j.sigpro.2004.12.006

Asynchronous LMS adaptive equalization

2005-07-01

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DOI：10.1016/j.sigpro.2004.12.006

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Digital data receivers often operate at a fixed sampling rate 1/T-s that is asynchronous to the baud rate 1/T. A digital equalizer that processes the incoming signal will also operate in the asynchronous clock domain. Existing adaptation techniques for this equalizer involve an error sequence e(k) that is produced in the synchronous clock domain, and converted to the asynchronous domain via an inverse sampling-rate converter. Several disadvantages of this approach may be avoided by means of an alternative topology that is developed and analyzed in this paper. Numerical results for an idealized optical storage channel serve to illustrate the merits of the approach. (c) 2005 Published by Elsevier B.V.

Keyword:

adaptive equalization

digital recording

optical storage

LMS

timing recovery

partial-response techniques

Asynchronous LMS adaptive equalization

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