Communication protocol adaptive channel equalizer and equalization method thereof

A technology of adaptive channel and communication protocol, applied in the direction of sustainable communication technology, advanced technology, baseband system components, etc., to achieve the effect of avoiding permanent loss of lock, improving stability and tolerance, and reducing switching frequency

Active Publication Date: 2022-06-10
NANJING QINHENG MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Purpose of the invention: In order to solve the problems of high cost, poor precision, large error and easy failure in the prior art of channel adaptive equalization, the present invention provides a communication protocol Adaptive Channel Equalizer

Method used

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  • Communication protocol adaptive channel equalizer and equalization method thereof
  • Communication protocol adaptive channel equalizer and equalization method thereof
  • Communication protocol adaptive channel equalizer and equalization method thereof

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Embodiment 1

[0048] According to the application scenario of USB3.0, this embodiment further proposes an optimal method for judging the CDR lock state. This embodiment is not limited to the USB3.0 scenario, and can be applied to any communication protocol, especially to a communication protocol that adds SSC at the physical layer.

[0049] like Figure 5 , the CDR lock state judging module includes a sequentially connected receiving data buffer, a TSEQ detector, a TSEQ counter and a CDR state judger, the input of the receiving data buffer is connected to the output signal of the comparator cache data unit, and the TSEQ detects The device performs sliding screening on the data information, and performs real-time monitoring on the equalization training sequence specified in the USB3.0 Specification (Revision1.0), such as counting the number of occurrences of the TSEQ sequence every 10us. The number of TSEQ sequences determines the lock status of the CDR.

[0050] The specific judgment meth...

Embodiment 2

Embodiment 3

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Abstract

The invention discloses a communication protocol adaptive channel equalizer and an equalization method thereof, the communication protocol adaptive channel equalizer comprises a CTLE compensation circuit, a comparator cache data unit, a CDR phase tracking module, a CDR locking state judgment module, a CTLE adaptive algorithm module and a CTLE curve selection module, the CDR locking state judgment module is used for judging the locking state of the CDR phase tracking module, and the CTLE adaptive algorithm module is used for selecting the CTLE curve. Outputting a CDR locking state signal; and the CTLE adaptive algorithm module and the CTLE curve selection module are respectively used for adjusting the CTLE compensation circuit when the CDR phase tracking module is in a locked state and an unlocked state. The method is low in implementation cost, high in precision, small in error and high in reliability.

Description

technical field [0001] The invention belongs to the field of electronic circuit design, and in particular relates to an adaptive channel equalizer and an equalization method suitable for communication protocols. Background technique [0002] With the development of Serial Encoder and Decoder (SERDES) technology, providing fast and reliable data communication is often complicated and challenging because of channel attenuation, intersymbol interference (ISI), crosstalk, random and deterministic jitter And system noise, etc. may seriously deteriorate the signal quality, which makes it difficult to restore the signal at the receiving end. For example, in the USB3.0 specification, part of the channel equalization protocol is defined, including the analog equalization curve of FFE / CTLE, and the channel equalization training sequence (TSEQ) applicable to USB3.0. However, the protocol does not detail the specific method of receiver adaptive equalization. [0003] Traditional adapt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03
CPCH04L25/03019H04L25/03885Y02D30/50
Inventor 庞玉帛欧阳翔刘德良杨仲盼
Owner NANJING QINHENG MICROELECTRONICS CO LTD
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