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Faculty Publications

Faculty Publications

Permanent URI for this communityhttps://idr.nitk.ac.in/handle/123456789/18736

Publications by NITK Faculty

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search.filters.author.Banakar, Dr.R.M.

1 search.filters.author.Kumar, P.

1 search.filters.author.Shankaranand, Dr.B.

search.filters.subject.Equalizers

1 search.filters.subject.Bit error rate

1 search.filters.subject.Conditional distribution

1 search.filters.subject.Decoding techniques

1 search.filters.subject.Dispersive channels

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Author: search.filters.author.Banakar, Dr.R.M.×

Subject: search.filters.subject.Equalizers×

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Capitalizing on the tremendous performance gains of turbo codes and the turbo decoding algorithm, turbo equalization is an iterative equalization and decoding technique that can achieve equally impressive performance gains for communication systems that send digital data over channels that require equalization, i.e. those which suffer from intersymbol interference (ISI). Turbo equalizers have been shown to be successful in mitigating the effects of inter-symbol interference introduced by partial response modems and by dispersive channels for code fates of R >l/2. We analyze the performance of iterative equalization and decoding (IED) using an M-BCJR equalizer. We use bit error rate (BER), frame error rate simulations and extrinsic information transfer (EXIT) charts to study and compare the performances of M-BCJR and BCJR equalizers on precoded and non-precoded channels. We predict the BER performance of IED using the M-BCJR equalizer from EXIT charts and explain the discrepancy between the observed and predicted performances.. We show that the true LLR's can be estimated if the conditional distributions of the extrinsic outputs are known and finally we design a practical estimator for computing the true LLR's from the extrinsic outputs of the M-BCJR equalizer. © Springer-Verlag 2004.
(Springer Verlag, M-BCJR based turbo equalizer) Kumar, P.; Banakar, Dr.R.M.; Shankaranand, Dr.B.
2004

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