Jad NASREDDINE's Home Page

- J. Nasreddine, X. Lagrange, "On The Computation of the Maximum Capacity of TDMA-CDMA/TDD Systems," in Proceedings of the 17th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, Helsinki, Finland, September 2006,
- J. Nasreddine and X. Lagrange, "Performance of TD-CDMA systems during crossed slots," in Proceedings of the 60th IEEE Semiannual Vehicular Technology Conference, Los Angeles, USA, Septembre 2004,
- J. Nasreddine and X. Lagrange, "Time Slot Allocation Based on Normalized Path Gain for TDCDMA TDD Systems," in Proceedings of the 1st International conference on Information & Communication technologies: From theory to Application, Damascus, Syria, 2004,
- J. Nasreddine, X. Lagrange, "Time slot allocation based on a path gain division scheme for TD-CDMA TDD systems," in Proceedings of the 57th IEEE Semiannual Vehicular Technology Conference, Jeju, Korea, April 2003, pp 880-884,
- J. Nasreddine, X. Lagrange, "Comparison of different slot allocation schemes in a TD-CDMA TDD system," in Proceedings of the second IEEE Workshop on Applications and Services in Wireless Networks, Paris, France, July 2002,
- J. Nasreddine, X. Lagrange, "Power control and slot allocation in a TD-CDMA system," in Proceedings of the 55th IEEE Vehicular Technology Conference, Birmingham, Al, USA, May 2002, pp 880-884.

- J. Nasreddine, Loutfi Nuaymi and X. Lagrange, "Adaptive Power Control Algorithm with Stabilization Zone," Annals of telecommunications, Vol. 61 n°9-10, Sept-Oct 2006
- J. Nasreddine and X. Lagrange, " A Simplified Generic Optimum Power Control Scheme for CDMA Cellular Systems," in Proceedings of the IEEE Workshop on Adaptive Wireless Networks (in conjuction with GLOBECOM 2004), Dallas, USA 2004,
- J. Nasreddine, L. Nuaymi and X. Lagrange, " Downlink Adpative Power Control Algorithm for 3G Cellular CDMA Networks," in Proceedings of the 15th IEEE international symposium on personal, indoor and mobile radio communications conference, Barcelona, Spain, 2004,
- J. Nasreddine, L. Nuaymi and X. Lagrange, " Adaptive Power Control Algorithm for 3G Cellular CDMA Networks ," in Proceedings of the 59th IEEE Semiannual Vehicular Technology Conference, Milan, Italy, May 2004





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Short CV

Jad Nasreddine is an expert in radio communication with over 10 years of experience in telecommunication industry and academy. He is presently Associate Professor at Rafik Hariri University. Previously, he was the RAN/Core product manager at Mobinets. Before, he was working as senior researcher at the RWTH Aachen University. Between 2005 and 2008 he was working as post-doctoral researcher at Telecom-Bretagne and BarcelonaTech, respectively. He received his Ph.D. degree in March 2005 from university of Rennes I and his B.E. in computer science and telecommunications in 2001 from the Lebanese university. During his PhD, he was working as research assistant at the Telecom-Bretagne. During his stay in RWTH Aachen, he was acting as project manager for European and industrial projects on designing and prototyping cognitive radio solutions for wireless networks and LTE systems with first-class European universities and international companies such as France telecom, imec, Microsoft, Toshiba, and Huawei.

Research Keywords

ASM (Advanced Spectrum Management)
CN (Cognitive Network)
CR (Cognitive Radio)
DCA (Dynamic Channel Allocation)
DSA (Dynamic Spectrum Allocation)
Femtocells and small cells
Green Networking
HetNet (Heterogeneous Network)
Machine Learning and Data Mining
MDT (Minimization of Drive-Tests)
PC (Power control)
Propagation models
REM (Radio Environmental Map)
RRM (Radio Resource Management)
Shadowing models
SON (Self-Orgnanizing Network)
TDD (Time Division Duplex)

Dr. Nasreddine has been actively participating in several European projects, international standardization bodies, and international conferences and workshops to develop new techniques for wireless systems such as cognitive radio, self-organizing networks, UMTS, LTE/LTE-Advanced, propagation models and femtocells. He has been also developing and instructing variety of courses and laboratories on telecommunication systems. Dr. Nasreddine served as track chair, associated editor, TPC and reviewer for several conferences and journals. He is also author of over 50 technical papers.

His research interests include cognitive and composite networks, spectrum and radio resource management, opportunistic access and cooperative networks, smallcells, stochastic and context based techniques, propagation models, and machine learning applications.

Thesis Abstract [PDF]

In systems using CDMA technique, users share the same bandwidth. Therefore, these systems are interference limited and the most important procedure to increase system capacity and ameliorate QoS level is interference management. In systems using pure CDMA technique, power control is a widely used procedure for decreasing interference and upholding required QoS levels. In addition to power control, the combination of TDMA and TDD techniques with CDMA provides a new degree of flexibility in interference management using slot allocation techniques. However, exploiting this flexibility induces new challenges to mitigate such as the presence of pernicious mobile-to-mobile interference.

Publications

SLot Allocation
Power control

In this thesis, we exploit the flexibility of TDMA-CDMA/TDD systems and the characteristics of the CDMA technique. We propose power control algorithms combined with slot allocation techniques in order to provide required QoS levels for users. First, we develop a simple generic optimum power control algorithm and we propose different schemes using this algorithm. The developed model can be applied to uplink, downlink and crossed slots to evaluate system performance and can be used to design efficient distributed algorithms.

Moreover, we propose simple modifications to the standardized closed-loop power control of the UMTS. The proposed modifications lead to a significant increase in system performance without increasing system complexity and signaling traffic. We also propose heuristic and meta-heuristic methods combining the optimum power control and slot allocation techniques to find the upper bound of system performance in TDMA-CDMA/TDD systems. These methods can be adapted to real systems using radio interface measurements. Finally, we investigate flexible slot allocation techniques to avoid high interference that can appear in systems supporting heterogeneous services and asymmetric traffic between uplink and downlink (i.e. mobile-to-mobile interference).