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Equalization Coefficient Search Algorithm

An equalization coefficient, computer technology, applied in the field of data transmission, can solve the problem of taking too much time

Inactive Publication Date: 2014-06-25
NVIDIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is infeasible to test every combination of coefficients to find the best one, as this method would usually take too much time
Furthermore, current methods for testing subsets of combinations of coefficients will often result in selecting suboptimal combinations

Method used

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Embodiment Construction

[0024] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order not to obscure the invention.

[0025] System Overview

[0026] figure 1 is a block diagram illustrating a computer system 100 configured to implement one or more aspects of the present invention. Computer system 100 includes a central processing unit (CPU) 102 and system memory 104 including device drivers 103 . CPU 102 and system memory 104 communicate via an interconnect path that may include memory bridge 105 . The memory bridge 105 may be, for example, a north bridge chip, connected to an input / output (I / O) bridge 107 via a bus or other communication path 106 (eg, a HyperTransport link). I / O bridge 107 , w...

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Abstract

The invention discloses an equalization coefficient search algorithm. A method comprises selecting a starting point on a map of equalization coefficients and measuring an eye height of a signal transmitted using the set of equalization coefficients associated with the starting point and an eye height associated with each adjacent point on the map relative to the starting point. The eye height associated with an adjacent point is based on a signal transmitted using the set of equalization coefficients associated with the adjacent point. The method also comprises walking on the map in a first direction from the starting point to the adjacent point associated with the greatest eye height, wherein the eye height associated with the adjacent point is greater than or equal to the eye height associated with the starting point.

Description

technical field [0001] The present invention relates generally to data transfer, and more particularly to a method for implementing channel equalization training using an equalization coefficient search algorithm. Background technique [0002] Typical data connectors, such as Peripheral Component Interface (PCI) or PCI express (PCIe), allow different processing units within a computer system to exchange data with each other. For example, a conventional computer system may include a central processing unit (CPU) that exchanges data across a PCIe bus with a graphics processing unit (GPU). [0003] When a signal is transmitted over a transmission channel across a data connector, some frequency components may be attenuated more than others, which may make the signal illegible at the receiving end. As the transfer speed becomes faster, the transfer may become more error-prone due to more severe noise effects. In high-speed transmission channels, signal quality is critical. One...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/20
CPCG06F13/20G06F13/385
Inventor 麦克尔·霍普古德黄伟杰维沙·梅塔希滕德拉·杜塔
Owner NVIDIA CORP
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