Pulse or digital communications – Repeaters – Testing
Patent
1988-06-30
1989-09-05
Safourek, Benedict V.
Pulse or digital communications
Repeaters
Testing
375103, 333 18, H04B 304, H04B 110
Patent
active
048645907
ABSTRACT:
Apparatus for suppressing intersymbol interference and improving the signal-to-noise ratio in a digital line amplifier includes a filter with a fixed transfer function that couples equalized digital signals to a first differential input of a difference amplifier and substantially filters out high frequency random noise present in the signals to achieve signal-to-noise enhancement with consequent degradation of the signals by intersymbol interference. Subsequently, an output from the amplifier is sampled by a quantizer that produces a bit stream output of portions of the enhanced signals, excluding the intersymbol interference. Signals from the bit stream are then coupled to a fixed coefficient decision feedback equalizer having the same transfer function as the filter and are output therefrom as feedback signals to a second differential input of the amplifier such that the signals at both differential inputs are substantially equal in terms of intersymbol interference, thereby suppressing such interference in the amplifier output.
REFERENCES:
patent: 3792356 (1974-02-01), Kobayashi et al.
patent: 4727543 (1988-02-01), Bauer
Aly Sami
Arnon Ephraim
Huseman Marianne
Northern Telecom Limited
Safourek Benedict V.
Sakovich Michael M.
LandOfFree
Apparatus and method for noise reduction in a digital line recei does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for noise reduction in a digital line recei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for noise reduction in a digital line recei will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-250043