3 research outputs found
Minimum Mean-Square-Error Equalization using Priors for Two-Dimensional Intersymbol Interference
Joint equalization and decoding schemes are described for two-dimensional intersymbol interference (ISI) channels. Equalization is performed using the minimum mean-square-error (MMSE) criterion. Low-density parity-check codes are used for error correction. The MMSE schemes are the extension of those proposed by Tüchler et al. (2002) for one-dimensional ISI channels. Extrinsic information transfer charts, density evolution, and bit-error rate versus signal-to-noise ratio curves are used to study the performance of the schemes
Joint Equalization and Decoding for Nonlinear Two-Dimensional Intersymbol Interference Channels with Application to Optical Storage
An algorithm that performs joint equalization and decoding for nonlinear
two-dimensional intersymbol interference channels is presented. The algorithm
performs sum-product message-passing on a factor graph that represents the
underlying system. The two-dimensional optical storage (TWODOS) technology is
an example of a system with nonlinear two-dimensional intersymbol interference.
Simulations for the nonlinear channel model of TWODOS show significant
improvement in performance over uncoded performance. Noise tolerance thresholds
for the algorithm for the TWODOS channel, computed using density evolution, are
also presented and accurately predict the limiting performance of the algorithm
as the codeword length increases.Comment: 12 pages, 4 figures, submitted to IEEE Transactions on Communication
Minimum Mean-Square-Error Equalization using Priors for Two-Dimensional Intersymbol Interference
Joint equalization and decoding schemes are described for two-dimensional intersymbol interference (ISI) channels. Equalization is performed using the minimum mean-square-error (MMSE) criterion. Low-density parity-check codes are used for error correction. The MMSE schemes are the extension of those proposed by Tüchler et al. (2002) for one-dimensional ISI channels. Extrinsic information transfer charts, density evolution, and bit-error rate versus signal-to-noise ratio curves are used to study the performance of the schemes