Distance Approach to Window Decoding

  • Authors:
  • M. Handlery;R. Johannesson;V. V. Zyablov

  • Affiliations:
  • -;-;-

  • Venue:
  • Problems of Information Transmission
  • Year:
  • 2002

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Abstract

In convolutional coding, code sequences have infinite length; thus, a maximum-likelihood decoder implies an infinite delay. Due to memory and delay constraints in practical coding schemes, convolutional codes often are either terminated or decoded by a window decoder. When a window decoder is used, the convolutional code sequence is not terminated; instead, the window decoder estimates information digits after receiving a finite number of noise-corrupted code symbols, thereby keeping the decoding delay short. An exact characterization of the error-correcting capability of window decoded convolutional codes is given by using active distances of convolutional codes.