1. Indian Institute of Technology,Dept. of Computer Science and Engineering,Roorkee,Uttarakhand,India
2. Ecole de Technologie Superieure (ETS),Electrical Engineering Department,Montreal,QC,Canada,H3C lK3
3. Ultra Communications,Montreal,QC,Canada,H4T 1V7
4. Institute XLIM, University of Poitiers,Poitiers,France