On the Equivalence Between SOVA and Max-Log-MAP Decodings

作     者：Fossorier, Marc P. C. Burkert, Frank Lin, Shu Hagenauer, Joachim 

作者机构：Univ Hawaii Dept Elect Engn Honolulu HI 96833 USA Tech Univ Munich D-80290 Munich Germany 

出 版 物：《IEEE COMMUNICATIONS LETTERS》 (IEEE Commun Lett)

年 卷 期：1998年第2卷第5期

页      面：137-139页

核心收录：

学科分类：0810[工学-信息与通信工程] 0808[工学-电气工程] 08[工学] 

基　　金：National Science Foundation, NSF, (NCR-94-15374) National Science Foundation, NSF 

主　　题：MAP decoding soft-input soft-output decoding SOVA 

摘      要：In this letter, it is shown that after a proper simple modification, the soft-output Viterbi algorithm (SOVA) proposed by Hagenauer and Hoeher becomes equivalent to the Max-Log-maximum a posteriori ( MAP) decoding algorithm. Consequently, this modified SOVA allows to implement the Max-Log-MAP decoding algorithm by simply adjusting the conventional Viterbi algorithm. Hence, it provides an attractive solution to achieve low-complexity near-optimum soft-input soft-output decoding.