Data transmission system comprising a decision feedback equalize

Details Data transmission system comprising a decision feedback equalize Data transmission system comprising a decision feedback equalize

1988-06-07

1989-09-12

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375103, 364572, H04L 2536

Patent

active

048667366

ABSTRACT:
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.

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J. G. Proakis, Digital Communications, (McGraw-Hill 1983) Ch. 6, & 6.5, pp. 382-386.
C. A. Ehrenbard et al., "A Baud-Rate Lime-Interface for Two-Wire High-Speed Digital Subscriber Loops" GLOBECOM 1982, Miami U.S.A., pp. D.8.4.1-D.8.4.5.
P. Kabal et al., "Partial-Response Signaling", IEEE Trans Commun., vol. COM-23, No. 9, pp. 921-934, Sep. 1975.
E. D. Forney, Jr., "Maximum-Likelihood Sequence Estimation of Digital Sequences in the Presence of Intersymbol Interference", IEEE Transactions, Inform. Theory, vol. IT-18, No. 3, pp. 363-378, May 1972.

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