Extension of Ethernet PHY to channels with bridged tap wires

A technology of Ethernet and channel, applied in synchronous signal speed/phase control, shaping network in transmitter/receiver, baseband system, etc., can solve the problems of reduced system throughput, high complexity, high power consumption of the system, etc.

Inactive Publication Date: 2018-10-19
AVAGO TECH INT SALES PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although OFDM offers several advantages, in some applications, systems using OFDM may suffer from high power consumption and / or high complexity
Furthermore, the throughput of the system may be reduced due to signaling overhead

Method used

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  • Extension of Ethernet PHY to channels with bridged tap wires
  • Extension of Ethernet PHY to channels with bridged tap wires
  • Extension of Ethernet PHY to channels with bridged tap wires

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Embodiment Construction

[0039] Certain embodiments of inventions including extended Ethernet PHY systems and methods are disclosed herein to provide and process debug preambles added to IEEE 802.3 standard Ethernet frames to address cables with severe intersymbol interference (ISI) Types of. In one system embodiment, the preamble is sent by the transmitter, and on the receiver side, synchronization logic is used to establish synchronization (eg, via determination of the preamble phase). Once preamble synchronization is achieved, the local preamble generator generates the same code as that generated in the transmitter, which is used to debug the decision feedback equalizer (DFE). After commissioning, any channel changes can be tracked with the decision value at the output of the DFE. Once the preamble is complete, the transmitter may switch to normal Ethernet PHY idle signal frames and / or Ethernet data frames comprising idle symbols and / or data symbols, respectively. In some embodiments, the same pr...

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Abstract

The invention discloses extension of an Ethernet phy to a channel with bridged tap wires; in one embodiment, receiving an Ethernet signal over a channel, the Ethernet signal comprising a preamble frame, an idle frame, and a data frame, the preamble frame comprising one or more preamble codes; synchronizing to the Ethernet signal based on the preamble frame; replicating the one or more preamble codes; and training a decision feedback equalizer (DFE) based on the one or more replicated codes, the training enabling the DFE to use decision values at the DFE output to track channel variations.

Description

[0001] Information about divisional applications [0002] This application is a divisional application of the Chinese invention patent application with the application number 201310066310.9, the title of the invention is "Extension of Ethernet PHY to Channel with Bridged Tap Line", and the filing date is March 1, 2013. technical field [0003] The present disclosure relates generally to Ethernet physical layer (PHY) systems and telephony. Background technique [0004] Ethernet PHY systems for high data rates (eg, 100M, 1G, and 10G) as specified in IEEE802.3 are designed to work over category cables with predetermined specifications. These category cables have a moderate amount of intersymbol interference (ISI). Some form of ISI mitigation, in particular various forms of Decision Feedback Equalizer (DFE) is often used to prevent ISI. A DFE may include feedforward filters and feedback filters. In order to debug (train) the DFE and other signal processing blocks, the transm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/04H04L25/02H04L25/03H04L7/08
CPCH04L7/041H04L7/08H04L25/0212H04L25/03057H04L2025/03681H04L2025/03783H04B1/10
Inventor 艾哈迈德·奇尼穆罕默德·泰兹贝
Owner AVAGO TECH INT SALES PTE LTD
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