SNDR Analysis & Its Impacts on Link Performance

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Originally Aired - Wednesday, August 18 2:00 PM - 2:40 PM

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Event Location

Location: Meeting Room 211CD


Event Information

Title: SNDR Analysis & Its Impacts on Link Performance

Event Type: DesignCon - Technical Session

Pass Type: All-Access Pass, 2-Day Pass


Description

In 50Gbps+ links, signal-to-noise-and-distortion ratio (SNDR) is an essential indicator that measures device and link component performance. SNDR measures the ratio between signal energy and noises from nonlinearity, uncompensated ISI, and random/unbounded noises in the link. While SNDR methodology is defined in IEEE 802.3, OIF-CEI, and soon to be included in PCI-Express Gen 6 standards, few literatures or studies were available that explains SNDR parameters, e.g. Dp (linear fit pulse delay), Np (linear fit pulse length), and test pattern, device/instrument configurations, e.g. equalization usages and waveform capturing, and how the SNDR manifests itself in the overall link performance. In this paper, we will explain and investigate the above factors with simulations and design of experiments with lab data.


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