Everything You Ever Wanted to Know About OFDMA for the Upstream Path
Tuesday, October 12, 2021: 1:00 PM - 2:00 PM EDT
Speaker(s)
Description
Broadband operators around the world are beginning to test upstream channel performance using OFDMA (Orthogonal Frequency Division Multiple Access), in the lab and in the field -- but it’s still “early days.” In this doubleheader from CableLabs, moderated by Comcast’s Larry Wolcott, attendees will learn useful methods for analyzing upstream network data, as well as available algorithms to logically extract outlier modems and node segments. Jay Zhu kicks it off with an overview of how to assess upstream plant performance by assigning health scores to modems and network segments, which informed by new methods of anomaly detection, behavior analysis, and pattern recognition. Next, Alberto Campos delves into some new pre-equalization methods that come with OFDMA, and how they can benefit mid-split and high-split configurations. Bonus: Attendees will come away with information about a handy (and arguably indispensable) algorithm that accounts for random delay and random phase data from CM-CMTS interactions. The algorithm, as a pre-processing tool, matters to upstream pre-equalization and channel estimation analyses.
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