EURECOM · 10.3.1
Channel coding ·
RAN1#124bis · Source verification
the AI's delta
new
vs RAN1#124
EURECOM is a new contributor at RAN1_124bis with no prior position on record. They introduce a novel proposal area not previously discussed: DMRS-less transmission for small UCI payloads using a vertical and horizontal coding (VHC) product-code strategy. They present a technical case against the NR RM code baseline, claiming up to 3dB SNR gain and 6.6dB PAPR reduction at 1% outage versus legacy PUCCH Format 3, with the argument that DMRS overhead (up to 28%) creates significant sub-optimality for short block lengths. Low receiver complexity is claimed via separation of detection in time and frequency domains.
AI-synthesized from contributions · all text is paraphrased
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Contributions at RAN1#124bis · 1 doc
Discussion on Channel Coding for Small Block Lengths
Position extracted by AI
EURECOM presents a technical case against the 5G NR Reed-Muller (RM) code baseline for small block lengths, arguing its performance is far from optimal and that significant room for improvement exists. They propose studying novel encoding/modulation schemes, specifically advocating for DMRS-less transmission using a vertical and horizontal coding (VHC) product-code strategy. They argue that DMRS overhead (up to 28% in PUCCH Format 3) introduces significant sub-optimality for short block lengths, and that DMRS-less designs offer significant performance gains and PAPR reduction (up to 6.6dB at 1% outage). They also argue that the proposed VHC scheme achieves low receiver complexity by separating detection in time and frequency domains.
Summary
EURECOM argues that 5G NR Reed-Muller (RM) codes are suboptimal for small UCI payloads and proposes studying novel DMRS-less transmission schemes using vertical-horizontal coding (VHC) for superior coverage, performance, and PAPR. The document presents 6 observations and 1 proposal, showing up to 3dB SNR gain and 6.6dB PAPR reduction over legacy PUCCH Format 3.
Prior contributions
EURECOM has no prior contributions to 10.3.1 in the meetings currently tracked. This is either a new contributor to this sub-topic or the earliest meeting in our history.
How this was derived
The AI extracted the "position extracted" field above directly from each Tdoc during summarization.
For the delta summary at the top, the AI compared EURECOM's consolidated stance at RAN1#124bis
against their stance at RAN1#124 and classified the change as
new.
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