Title :
An algorithm for detecting unreliable code sequence segments and its applications
Author :
Freudenberger, Jürgen ; Stender, Boris
Author_Institution :
Dept. of Telecommun. & Appl. Inf. Theor., Univ. of Ulm, Germany
Abstract :
Let the Viterbi algorithm be applied for maximum-likelihood decoding of a terminated convolutional code using a trellis. We propose an additional procedure that permits a receiver to locate unreliable segments within an estimated code sequence. This reliability output may be used, for example, to request retransmissions, in systems with error concealment, or in channel-coding systems with unequal error protection.
Keywords :
Viterbi decoding; channel coding; maximum likelihood decoding; trellis codes; Viterbi algorithm; channel-coding system; code sequence segment; error concealment; estimated code sequence; maximum likelihood decoding; request retransmission; terminated convolutional code; trellis code; unequal error protection; Automatic repeat request; Communications Society; Convolutional codes; Error correction codes; Information theory; Maximum likelihood decoding; Maximum likelihood detection; Maximum likelihood estimation; Testing; Viterbi algorithm; 65; Convolutional codes; Viterbi decoding; list decoding; reliability output; repeat request;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2004.836556
