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We propose a generalized belief propagation (GBP) receiver for two-dimensional (2D) channels with memory, which is applicative to 2D intersymbol interference (ISI) equalization and multiuser detection (MUD). Our experimental study demonstrates that under non-trivial interference conditions, the performance of this fully tractable GBP receiver is almost identical to the performance of the optimal maximum a-posteriori (MAP) receiver.
Shental et al. (Wed,) studied this question.