Title :
On the formation of extrinsic information in turbo decoding
Author :
Johnston, Leigh A. ; Krishnamurthy, Vikram ; Davis, Linda
Author_Institution :
Centre for Syst. Eng. & Appl. Mech., Univ. Catholique de Louvain, Belgium
Abstract :
The extrinsic update at each iteration in the turbo decoding algorithm (TDA) is shown to be a memoryless, nonlinear function of the change in transition probability estimate produced by a Baum-Welch update to the same system. Thus the passage of extrinsic information is formulated in terms other than the removal of `redundant´ information
Keywords :
iterative decoding; nonlinear functions; turbo codes; Baum-Welch update; extrinsic information formation; extrinsic update; iterative decoding; memoryless nonlinear function; transition probability estimate; turbo decoding; Convolutional codes; Information theory; Iterative decoding; Systems engineering and theory;
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936055
