A shortened code is created by taking only s s k

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t is n symbols long. A ‘shortened’ code is created by taking only S (S < k) information symbols as input, appending a fixed string of length k-S and then encoding in the normal way. This fixed string is called ‘fill’. Since the fill is a predetermined sequence of symbols, it need not be transmitted over the channel. Instead, the decoder appends the same fill sequence before decoding. In this case, the fill is called ‘Virtual Fill’. CCSDS 131.0-B-2 Page D-4 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING ANNEX E INFORMATIVE REFERENCES (INFORMATIVE) [E1] Procedures Manual for the Consultative Committee for Space Data Systems. CCSDS A00.0-Y-9. Yellow Book. Issue 9. Washington, D.C.: CCSDS, November 2003. [E2] Telemetry Channel Coding. Recommendation for Space Data System Standards, CCSDS 101.0-B-6-S. Historical Recommendation. Issue 6-S. Washington, D.C.: CCSDS, (October 2002) August 2005. [E3] Advanced Orbiting Systems, Networks and Data Links: Architectural Specification. Recommendation for Space Data System Standards, CCSDS 701.0-B-3-S. Historical Recommendation. Issue 3-S. Washington, D.C.: CCSDS, (June 2001) August 2005. [E4] M. Perlman and J. Lee. Reed-Solomon Encoders—Conventional vs. Berlekamp’s Architecture. JPL Publication 82-71. Pasadena, California: NASA-Jet Propulsion Laboratory, December 1982. [E5] Mission Profiles for TM Synchronization and Channel Coding. Proposed Recommendation for Space Data System Practices, CCSDS 131.4-W-0. White Book. Issue 0. Washington, D.C.: CCSDS, Proposed. NOTE – Normative references are listed in 1.7. CCSDS 131.0-B-2 Page E-1 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING ANNEX F TRANSFORMATION BETWEEN BERLEKAMP AND CONVENTIONAL REPRESENTATIONS (INFORMATIVE) F1 PURPOSE This annex provides information to assist users of the Reed-Solomon code in this Recommended Standard to transform between the Berlekamp (dual basis) and Conventional representations. In addition, it shows where transformations are made to allow a conventional encoder to produce the dual basis representation on whi...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online