Signal equalizing arrangement and a method of equalizing a recei

Details Signal equalizing arrangement and a method of equalizing a recei Signal equalizing arrangement and a method of equalizing a recei

1989-01-04

1991-09-17

Olms, Douglas W.

Pulse or digital communications

Repeaters

Testing

375 12, 333 18, 3647242, H04B 304

Patent

active

050501860

ABSTRACT:
A signal equalizing arrangement comprises a decision feedback equalizer formed by a feedforward filter section (16) connected to a feedback filter section (18) which includes a decision stage (20). If the performance of the equalizing arrangement as determined by the signal to noise ratio versus the bit error rate is found to be below the calculated optimum performance of the decision feedback equalizer, then an improved performance may be obtained by operating the equalizer in a time reverse mode. In order to operate the equalizer in a time reverse mode, a first last-in, first-out store (60) is connected in the signal path to the feedforward filter section (16) and a second last-in, first-out store (62) is connected to the output of the decision stage (20).

REFERENCES:
patent: 4747068 (1988-05-01), Voorman et al.
patent: 4872184 (1989-10-01), Yamaguchi et al.
"Linear Recursive Adaptive Equalizers", B. A. Cochran et al., IEEE, New York, pp. 263-272.
"Baseband Equalizer Performance in the Presence of Selective Fading", H. Sari, IEEE, New York, pp. 1.1.1-1.1.7.
"Timing Recovery in Digital Synchronous Data Receivers", K. Mueller, IEEE Transactions on Communications, vol. Com. -24, No. 5, May 1976, pp. 516-531.
"Optimum Mean-Square Decision Feedback Equalisation", The Bell System Technical Journal, Oct. 1973, pp. 1341-1373.

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