A novel suboptimal piecewise-linear-log-MAP algorithm for turbo decoding

Autor:	Oleg V. Stukach, A.Ia. Kulyk, A. N. Romanyuk, Yu. Yu. Ivanov
Rok vydání:	2015
Předmět:	Mathematical optimization Logarithm Computational complexity theory BCJR algorithm Function (mathematics) Serial concatenated convolutional codes Piecewise linear function symbols.namesake Jacobian matrix and determinant Turbo code symbols Algorithm Computer Science::Information Theory Mathematics
Zdroj:	2015 International Siberian Conference on Control and Communications (SIBCON).
Popis:	In this paper, a new suboptimal modification for the log-MAP turbo decoding algorithm is proposed. This method (PL-log-MAP) based on the piecewise linear approximation of the the compensation term (correction function) in the Jacobian logarithm used by the MAP (BCJR) decoder. Using the proposed approximation, the complex functions ln(.) and exp(.) in the log-MAP algorithm can be estimated with high accuracy and lower computational complexity. The efficacy of the proposed approximation is investigated and demonstrated by applying it to digital communication system. The performance of the PL-log-MAP algorithm is shown to have the closest performance to the original log-MAP solution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e00c6c5cab078bd1b3a44ac8d5fb136f https://doi.org/10.1109/sibcon.2015.7147195 Zobrazit plný text záznamu