1. Department of Electrical Engineering; COMSATS Institute of Information Technology; Park Road, Chak Shahzad; Islamabad; Pakistan
2. Center for Advance Studies in Telecommunications; COMSATS Institute of Information Technology; Park Road, Chak Shahzad; Islamabad; Pakistan
3. Department of Telecommunication Engineering; University of Engineering and Technology; Taxila; Lahore; Pakistan
4. Laboratoire ESYCOM; University of Paris Est, Marne la-Vallée; Champs-sur-Marne 77454; France