1. Alzaiem Alazhari University,Department of Electrical Engineering,Khartoum,Sudan
2. Taif University,College of Computers and Information Technology,Department of Computer Engineering,Taif,Saudi Arabia,21944
3. Sudan University of Science and Technology,Department of Electronics Engineering,Khartoum,Sudan
4. International Islamic University Malaysia, Gombak, Malaysia & Libyan Center for Engineering Resarch and Information Technology,Department of Electrical and Computer Engineering,Bani Waleed,Libya