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US 2014/0362901 A1Published application
Methods and systems for providing optimum decision feedback equalization of high-speed serial data links
AssigneeTektronix, Inc.
InventorKan TAN
Life of this patent
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Abstract
Computationally efficient methods and related systems, for use in a test and measurement instrument, such as an oscilloscope, optimize the performance of DFEs used in a high-speed serial data link by identifying optimal DFE tap values for peak-to-peak based criteria. The optimized DFEs comply with the behavior of a model DFE set forth in the PCIE 3.0 specification.
Claims13
A system for optimizing the equalization of a high-speed data link comprising:
- an input configured to receive an input waveform;
- a processor configured to perform decision feedback equalizer (DFE) adaptation on the input waveform for a multi-feedback coefficient DFE with n feedback coefficients, where n is greater than 1, the processor operable to execute stored instructions, including:
- measuring minimum and maximum voltage outputs associated with a specified horizontal position of the unit interval for n+1 bit patterns for the input waveform;
- formulating a linear equation using the measured minimum and maximum voltage outputs of the n+1 bit patterns;
- determining the optimal n feedback coefficients by solving the linear equation;
- and
- emulating the DFE to determine an equalized input waveform based on the determined optimal n feedback coefficients.
4 more elements
A method for optimizing the equalization of a high-speed data link comprising:
- receiving an input waveform to be processed through a multi-feedback coefficient DFE with n feedback coefficients, where n is greater than 1;
- measuring minimum and maximum voltage outputs associated with a specified horizontal position of a unit interval for n+1 bit patterns for the input waveform;
- formulating a linear equation using the measured minimum and maximum voltage outputs of the n+1 bit patterns;
- determining the optimal n feedback coefficients by solving the linear equation;
- and
- emulating the DFE to determine an equalized input waveform based on the determined optimal n feedback coefficients.
3 more elements
Dependencies are inferred from the claim text.