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Performance of MMSE turbo equalization using outer LDPC coding for magnetic recording channels

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2 Author(s)
Ölçer, S. ; IBM Zurich Res. Lab., Ruschlikon, Switzerland ; Keskinoz, M.

We investigate the performance of minimum mean-square error turbo-equalization for LDPC-coded transmission over intersymbol-interference channels. The EXIT-chart technique is used to study the effect of code rate on the convergence of the turbo-equalization process. The analysis is conducted for partial-response channels of various types and for the magnetic recording channel. Performance results obtained from simulations show good agreement with the EXIT-chart analysis. They indicate that for applications requiring high code rates equalizer-based detection may suffer from a nonnegligible loss in performance as compared with maximum a posteriori detection.

Published in:

Communications, 2004 IEEE International Conference on  (Volume:2 )

Date of Conference:

20-24 June 2004