1. Safran Electronics and Defenses,Research and Technology,Massy,France,91300
2. Institut Polytechnique de Paris,LTCI Télécom Paris,Palaiseau,France,91120
3. Univ Gustave Eiffel, CNRS,LIGM,Marne-la-Vallée,France,F-77454
4. University of Canterbury,Computer Science and Software Eng. Dept,Christchurch,New Zealand,8140