The minimum likelihood APP based early stopping criterion for multi-binary turbo codes [articol]

Abstract

This paper presents a simple and efficient criterion for stopping the iteration process in multibinary symbol turbo-decoding with a negligible degradation of the error performance. The criterion is devised starting to minimum log-likelihood ratio (LLR) based stopping criterion used for binary turbo codes (BTC). Two variants consist in particularizations of the same idea in the MAP and MaxLogMAP decoding algorithm cases. The proposed two variants criterion has efficiency close to the optimum (genie) criterion and is simple to perform.