1. Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France; University of Science and Technology Houari Boumediene, LSI Lab, Algeria; and Ecole Normale Supérieure, Kouba, Algiers, Algeria
2. Univ Brest, Lab-STICC, CNRS, UMR 6285, F-29200 Brest, France
3. University of Science and Technology Houari Boumediene, LSI Lab, Algeria
4. ENSTA Bretagne, Lab-STICC, CNRS, UMR 6285, Brest, France