Maximum a posteriori bit-unstuffing

  • Authors:

  • James Hicks;Tim Meehan;Frank Kragh

  • Affiliations:

  • The Aerospace Corporation, Chantilly, VA;Vista Research, Inc., Monterey, CA;Naval Postgraduate School, Monterey, CA

  • Venue:
  • ICC'09 Proceedings of the 2009 IEEE international conference on Communications
  • Year:
  • 2009

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Abstract

Bit-stuffing is the procedure of introducing an extra bit in the transmitted stream after a fixed number of consecutive ones or zeros. This paper demonstrates that, for conventional unstuffing, the BER experienced by individual bits within a stuffed frame dramatically and monotonically degrades with its positional-index. We also show that when knowledge of the number of stuffed bits is applied to maximum a posteriori (MAP) bit-unstuffing (MAPBU) (through a BCJR algorithm), this trend is significantly mitigated.