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SLS-C&S WG

SLS-C&S WG. Spring 2004 Meeting Summary to SLS Area Director. SLS-C&S WG summary. Problems report: Missing consensus. Future work/charter: Future work will continue as BOF. Charter to be produced. See further for details. Discussed Topics (1/3).

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SLS-C&S WG

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  1. SLS-C&S WG Spring 2004 Meeting Summary to SLS Area Director

  2. SLS-C&S WG summary • Problems report: • Missing consensus. • Future work/charter: • Future work will continue as BOF. Charter to be produced. • See further for details.

  3. Discussed Topics (1/3) • Serial Concatenated Convolutional Codes for 8PSK (ESA/ESTEC/Polito) • Proposal currently ongoing in RFM; informative for C&S. Possible future options together with new modulation schemes. • Complexity Comparison of Coding Schemes (ESA/ESTEC/Polito)

  4. Discussed Topics (2/3) • Requirements, Benchmarking & Overview of Proposed LDPCC (ESA/ESOC/UniBO) • Initial proposal to be discussed and refined with WG Members. • Generalized IRA LDPCC (ESA/ESOC/UniBO) • Further possibility for refining LDPCC selection.

  5. Discussed Topics (3/3) • Orange Book Progress & Considerations on Requirements (NASA/GSFC) • JPL Proposal for LDPCC (NASA/JPL) • CNES proposal supporting DVB-S2 adoption (CNES)

  6. Problem & Way Out (Hopefully) • Three Different proposals tabled • NASA/GSFC Quasi-Cyclic LDPCC • NASA/JPL Protograph LDPCC • CNES support to DVB-S2 •  NO CONSENSUS • WG not justified any more • Migration to BOF or complete stop?

  7. Migration to BOF or complete stop? • Member Agencies recognize the difficult status without consensus and take proactive approach. • Principle agreement for a set of “agreeable” codes reached. • Codes shall be evaluated by BOF work and eventually generate consensus proposal for WG. • Resolution: Convert WG to BOF.

  8. Agreed Set • Rate ½ Code to be derived by JPL proposal • Rate 7/8 Code to be derived by GSFC proposal C2 • Rates 2/3, ¾ and 5/6 Quasi-Cyclic Codes to be proposed by GSFC • All codes to be validated by BOF taking as reference DVB-S2 characteristics.

  9. Objectives of BOF • Identify a set of mandatory/desirable requirements (addressing also interaction with modulation). • Define a Benchmark Matrix for evaluation of proposed codes wrt identified req’s. • Identify a set of Quasi-Cyclic LDPCC for frames of (approx) 8 & 16k bits (des.32k). • Select the proposed codes by proper benchmarking.

  10. Schedule of BOF • Identify requirements. • Define a Benchmark Matrix. By Fall 2004 • Identify a set of Quasi-Cyclic LDPCC for frames of (approx) 8 & 16k bits (des.32k). • Select the proposed codes by proper benchmarking. By Spring 2005 (Initial results) By Fall 2005 (Finalized results)

  11. One task for the WG? • The Orange Book Task is not dropped. • Shall it continue as (only) task of the WG while the code selection is moved to the newly created BOF?

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