Title :
A posteriori probabilities and performance evaluation of trellis codes
Author :
Loeliger, Hans Andrea
Author_Institution :
Linkoping Univ., Sweden
fDate :
27 Jun-1 Jul 1994
Abstract :
A new method for the performance evaluation of (Viterbi decoded) trellis codes is investigated. The method is based on the fact that the a posteriori probability of individual decoded bits can be computed very efficiently. Unfortunately, the improvement of the new method over ordinary simulation is found to be only marginal, which reveals unexpectedly strong fluctuations of the reliability of individual decoded bits
Keywords :
Viterbi decoding; convolutional codes; error statistics; trellis codes; Viterbi decoding; a posteriori probabilities; convolutional-type codes; error rate; fluctuations; forward-backward algorithm; individual decoded bits; performance evaluation; reliability; simulation; trellis codes; Block codes; Convolution; Convolutional codes; Costs; Decoding; Error analysis; Fluctuations; Hidden Markov models; Signal processing algorithms; Viterbi algorithm;
Conference_Titel :
Information Theory, 1994. Proceedings., 1994 IEEE International Symposium on
Conference_Location :
Trondheim
Print_ISBN :
0-7803-2015-8
DOI :
10.1109/ISIT.1994.394683
