Title :
Efficient stopping rule for turbo decoders
Author :
Rovini, M. ; Martinez, A.
Author_Institution :
Dept. of Inf. Eng., Univ. of Pisa, Italy
Abstract :
A new stopping rule for turbo codes, the input-output consistency (IOC) check is presented. It is based on an extended maximum a posteriori algorithm that also outputs (hard) extrinsic estimates on the coded bits. In parallel, the hard decisions of the info bits are re-encoded and if the two sequences coincide, iterative decoding is stopped. Remarkably, IOC beats other known stopping rules in terms of error rate and convergence speed, closely approaching ideal ´Genie´-aided decoding.
Keywords :
error statistics; iterative decoding; maximum likelihood estimation; turbo codes; Genie-aided decoding; MAP algorithm; convergence speed; error rate; input-output consistency check; iterative decoding; maximum a posteriori algorithm; stopping rule; turbo codes; turbo decoders;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20064403
