Time-reversed infinite impulse response digital filtering

Details Time-reversed infinite impulse response digital filtering Time-reversed infinite impulse response digital filtering

1994-07-11

1997-05-06

Bocure, Tesfaldet

Pulse or digital communications

Equalizers

375350, H03H 730

Patent

active

056278594

ABSTRACT:
A digital filter includes a first memory device, a filter with at least one pole, i.e., a pole filter, coupled to the first memory device, and a second memory device coupled to the pole filter. The first memory device sequentially stores a digital signal in a forward sequence, and the pole filter sequentially reads the stored digital signal from the first memory device in a reverse sequence, thereby creating a time-reversed signal. The time-reversed signal is filtered by the pole filter, and is then stored as a filtered time-reversed signal in the second memory device in the forward sequence. A data signal is generated by the second memory device by reading the filtered time-reversed signal from the second memory device in the reverse sequence.

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Ariyavisitakul, "Equalization of a Hard-Limited Slowly-Fading Multipath Signal Using a Phase Equalizer with a Time-Reversal Structure", IEEE Vehicular Technology Conference, Orlando, Florida, May 6-9, 1990, pp. 520-526.
Scott R. Powell and Paul M. Chau A Technique for Realizing Linear Phase IIR Filters IEEE Transactions on Signal Processing, vol. 39, No. 11, Nov. 1991 .

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