In this paper the cancellation of linear Intersymbol Interference (ISI) in two-dimensional systems is discussed. A theory is developed for the error rate of receivers that use tentative decisions to cancel ISI. Furthermore, precise conditions are formulated under which such ISI cancellation can be applied effectively. For many two-dimensional systems these conditions are easily met and therefore the application of ISI cancellation is of significant interest for these systems. The theory and the conditions are validated by simulation results for a two-dimensional channel model. Furthermore, results for an experimental two-dimensional optical storage system show that for a single layer disc with a capacity of 50 GB a substantial performance improvement may be obtained by applying ISI cancellation.
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