Systems and methods for loop processing with variance adaptation

摘要

Systems and methods for data processing, and more particularly systems and methods for loop processing with variance adaptation.

主权项

1. A data processing system comprising:
a filter circuit operable to equalize a series of digital samples; a variance adaptation circuit operable to generate a plurality of scaling factors for the series of digital samples based at least in part on the series of digital samples, on ideal values of the series of digital samples, and on a target variance; a data detector circuit operable to scale the series of digital samples by the plurality of scaling factors to yield scaled digital samples and to apply a data detection algorithm to the scaled digital samples to yield a detected output, wherein a variance of a distribution for each data pattern in the series of digital samples is normalized by the plurality of scaling factors; a second data detector circuit operable to apply to data detection algorithm to a signal derived from the series of digital samples to yield a second detected output; and a data decoder circuit operable to apply a data decoding algorithm to a decoder input derived from the second detected output to yield a decoder output, wherein the ideal values are derived from the decoder output.