Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. On boxoperations for Lvalues and their applicability to softdecision algorithms
 Ecole Royale Militaire ERM, Brüssel: International Conference on Military Communications and Information Systems, ICMCIS 2016 : Brussels, Belgium, 23rd24th May 2016 Piscataway, NJ: IEEE, 2016 ISBN: 9781509017775 ISBN: 9781509017782 ISBN: 9781509004720 S.221225 
 International Conference on Military Communications and Information Systems (ICMCIS) <2016, Brussels> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer FKIE () 
Abstract
Modern digital communication systems can benefit from softdecision algorithms in receiver implementations. Such algorithms require reliability information about every data bit which is typically given in terms of LogLikelihood Ratios (LLRs) or short LValues. Several efficient receiver implementations based on LValues have already been proposed in the literature. Many of them exploit the famous BoxPlus operation. Its inverse has also been introduced in terms of the BoxMinus operation. In this letter, at first the specific characteristics of both operations, the BoxPlus as well as the BoxMinus operation, will briefly be reviewed. Secondly, as a novelty we will define two more operators, the BoxMultiply and the BoxDivide operation. An illustrative example will demonstrate the necessity for these two new operators. Finally, we will propose a practical solution for eliminating a critical side constraint of the BoxMinus operation which was known to be a limiting factor so far.