Method for Eliminating Intersymbol Interference and a Decision Feedback Sequence Predictor

A technology of intersymbol crosstalk and decision feedback, which is applied in the field of decision feedback sequence predictors, can solve the problems of chip design risks, the overall performance of 1000BASE-T physical layer chips cannot be fully verified by FPGA, hidden dangers, etc.

Active Publication Date: 2018-03-09
HUAWEI TECH CO LTD
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Problems solved by technology

[0009] The present invention provides a method for eliminating intersymbol crosstalk and a decision feedback sequence predictor, in order to solve the problem existing in the prior art that DFSE cannot run in FPGA, and then cause the overall performance of the 1000BASE-T physical layer chip to not be obtained Full verification of FPGA brings huge risks and hidden dangers to chip design

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  • Method for Eliminating Intersymbol Interference and a Decision Feedback Sequence Predictor
  • Method for Eliminating Intersymbol Interference and a Decision Feedback Sequence Predictor
  • Method for Eliminating Intersymbol Interference and a Decision Feedback Sequence Predictor

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[0080] The following will clearly and completely describe the technical solution in this embodiment with reference to the drawings in this embodiment. Obviously, the described embodiment is only a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0081] In order to solve the problem in the prior art that the traditional decision feedback sequence predictor (DFSE) cannot run in the FPGA because of its too long critical path, and the overall performance of the 1000BASE-T physical layer chip cannot be fully verified by the FPGA. Chip design brings huge risks and hidden dangers, and the invention provides a novel decision feedback sequence predictor.

[0082] The DFSE provided in this embodiment includes an intersymbol crosstalk shaping filter ISF, an...

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Abstract

The invention discloses a method for eliminating intersymbol crosstalk and a decision feedback sequence predictor, which relate to the technical field of communication. The method includes: the intersymbol crosstalk shaping filter receives the input signal, processes the input signal to change the tap energy distribution of the intersymbol crosstalk, and obtains the first output signal; the improved feedforward equalizer receives the first output signal, and eliminates the first output signal. All taps of the precursor ISI in the output signal and the first tap of the rear body ISI obtain the second output signal; the improved decision feedback equalizer receives the second output signal and eliminates the u+th of the rear body ISI in the second output signal 1 to u+m taps to obtain the third output signal; the improved parallel decision feedback decoder receives the third output signal to perform Viterbi decoding, and eliminates the second to uth taps of the rear body ISI in the third output signal , to get the target signal. The present invention is typically applied in the specific implementation process of 1000BASE-T physical layer chips.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for eliminating intersymbol crosstalk and a decision feedback sequence predictor. Background technique [0002] Ethernet started to develop from 10M, experienced many changes, and developed to the current Gigabit Ethernet. Gigabit Ethernet is characterized by high efficiency, high speed, and high performance, and has been widely used in industries such as finance, commerce, education, and government agencies. [0003] Gigabit Ethernet adopts 1000BASE-T Ethernet technology, which can realize the transmission speed of 1000M using 4 pairs of unshielded category 5 twisted pair as the transmission medium. In the specific implementation process of 1000BASE-T technology, all 4 pairs of category 5 twisted pair wires are used for bidirectional transmission and reception; at the same time, a five-level pulse amplitude modulation mode (Pulse Amplitude Modulation, PAM- 5). ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/03
Inventor 邱炳森
Owner HUAWEI TECH CO LTD
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