Data transmission system comprising a decision feedback equalizer and using partial-response techniques

摘要

A system for transmitting an n-level data signal (d.sub.k) at a given symbol rate 1/T comprises a data transmitter (1), a transmission channel (2) and a data receiver (3) with an equalizer (30) of the decision feedback type. By arranging this equalizer (30) for forming an estimate (c.sub.k) of a virtual m-level data signal (c.sub.k) instead of the output signal (b.sub.k) of the data transmitter (1) error propagation in the equalizer (30) is considerably reduced without thereby appreciably adding to the implementation-complexity of the system.