Status of Next Generation Uplink Green Book and Next Steps Greg Kazz Ed Greenberg NASA/JPL Oct. 15, 2012

Current NGU Table of Contents 1)Introduction – Purpose & Scope, Applicability, Rational, References 2)Comparison between Current TC and NGU approaches – Current Uplink Architecture, Recent Advances – Key Trade-offs Selection of code(s) for NGU Selection of sync word for NGU CLTU Selection of termination method for NGU CLTU 3)Uplink Coding for the new TC standard – Application and Figures of Merit 4)Four Major Application Profiles 5)Coding Trade Studies 6)Randomization (BCH vs LDPC) 10/15/12Fall CCSDS Meeting - Cleveland 20122

DLR Material Since the Darmstadt meeting, the high level performance data of DLR non-binary LDPC codes was added to the NGU GB 10/15/12Fall CCSDS Meeting - Cleveland 20123

Proposals Option 1: Keep the NGU GB as is with all of this information into this one Green Book Option 2: Separate out the content of the NGU GB into two separate green books – One overall Top Level System Engineering Concepts and Concerns becomes the NGU GB – Detailed Coding material becomes a new NGU Uplink Coding GB containing: Short length binary JPL LDPC codes Short Length non-binary DLR LDPC codes Short Length non-binary JPL LDPC codes 10/15/12Fall CCSDS Meeting - Cleveland 20124