TailBiting Convolutional Codes with Expurgation and RateCompatible Puncturing
Tail-Biting Convolutional Codes with Expurgation and Rate-Compatible Puncturing for the Secondary Fast Feedback Channel IEEE 802. 16 Presentation Submission Template (Rev. 9) Document Number: IEEE S 802. 16 m-09/0506 r 1 Date Submitted: 2009 -03 -09 Source: Jason Chen, Kai Yu, Sten Sjöberg, Per-Erik Östling, Per Ernström Ericsson AB E-mail: Voice: +46 761011214 jason. t. chen@ericsson. com Venue: 802. 16 m-09/012, Call for Contributions on Project 802. 16 m Amendment Working Document (AWD) Content , Ballot id: tgmawd Base Contribution: C 80216 m-09/0506 r 1 Purpose: Discussion and Eventual Adoption Notice: This document does not represent the agreed views of the IEEE 802. 16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802. 16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: <http: //standards. ieee. org/guides/bylaws/sect 6 -7. html#6> and <http: //standards. ieee. org/guides/opman/sect 6. html#6. 3>. Further information is located at <http: //standards. ieee. org/board/pat-material. html> and <http: //standards. ieee. org/board/pat >.
Tail-biting convolutional codes (TBCC) for Secondary Fast Feedback Channel (SFBCH) • Performances of TBCC are better than or about the same as other linear block codes for SFBCH for payload 7 to 24 bits – 1 encoding (instead of 2 encodings) for payload 13 to 24 bits: 1 d. B~2 d. B gain @ PER=10 -4 • TBCC can be decoded efficiently by simple Wrap-Around Viterbi Algorithm (WAVA), with complexity much less than MLD • Reuse of 16 e TBCC decoder structure
Why 1 Encoding for Payload 13 to 24 bits? minimum distance (d_min) comparison
TBCC with 1 Encoding: 1 d. B~2 d. B gain for payload 13 to 24 bits
TBCC with WAVA has much lower decoding complexity than MLD
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