Equalizer for communication over noisy channels

Details Equalizer for communication over noisy channels Equalizer for communication over noisy channels

2005-08-30

2005-08-30

Chin, Stephen (Department: 2634)

Pulse or digital communications

Equalizers

C375S343000, C375S232000, C375S233000

Reexamination Certificate

active

06937648

ABSTRACT:
An apparatus for and a method of iterative equalization for communication over noisy channels suitable for use with a wide range of different types of communications systems and channels that is particularly applicable to power line based communication systems. Equalization of received symbols is achieved by iteratively removing the influence of previous symbols dispersed due to channel ISI. Equalization is performed using iterative subtraction in combination with calculations based on the inverse of the transfer matrix. The impulse response of previous symbols is subtracted out to yield the impulse response of the received symbol. The estimate of the current symbol {tilde over (B)}nis then calculated by passing the modified received symbol through a matched filer which functions to remove the effect of channel ISI from the symbol. Multiple iterations are performed to improve the accuracy of the resultant symbol decision.

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Wolfgang H. Gerstacker, Member IEEE, Ralf R. Muller, Member, IEEE and Johannes B. Huber, Member IEEE, “Interactive Equalization with Adaptive Soft Feedback” Not dated.

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