Project Field : Wireless Communication – Adaptive Resource Allocation
Project Title : Particle Swarm Optimization in Multi-User Orthogonal Frequency-Division Multiplexing Systems
Project : M.Eng in Electric and Electronic Engineering
Project Duration : July 2010 – August 2013
Project Supervisors : Kenneth Teo Tze Kin
Description of Project :
Orthogonal Frequency Division Multiplexing (OFDM) is a multicarrier modulation technique of transferring an information bit stream on several sub-carrier frequencies. OFDM is used in many communication systems which exhibit high spectral efficiency and robustness against multipath fading channels. However, scheduling and resource allocation in multiuser OFDM system is complicated due to the different possibilities faced by the sub-channel assignments, furthermore the requirements for each user is not homogeneous. Therefore, it is challenging to strategically allocate radio resources and maximize system performance in a multiuser environment. Through modelling of the multiuser OFDM communication system, investigation in simulations shows that adaptive modulation in OFDM uses Channel State Information (CSI) to optimize the sub-carrier modulation scheme. In this research, the overall system performance improvement is achieved by allocating the best user-to-sub-carrier combinations. To minimize the power consumption, Particle Swarm Optimization (PSO) is utilized to find the exact or near optimal resource allocation for the users. PSO is efficient in handling big solution space akin to resource allocation problems with different permutations mentioned. As a part of enhancing the performance of PSO, investigation of the control parameters effect on multi-user OFDM resource allocation is presented, resulting in particle reselection and dynamic inertia approach which shows 8 % of improvement over standard PSO algorithm. Results also prove that the combination of both enhancements helped the algorithm to perform significantly better compared to a single enhancement. Furthermore, the introduction of PSO showed 70-75 % of power saving advantage over suboptimal resource allocation techniques.
Contact Person : Scott Lye Carr Ken
Contact Email : scottlye@gmail.com
Publications:
International Journal
[J1301] S.C.K. Lye, Y.S. Chia, B.L. Chua, K.B. Yeo, K.T.K. Teo. Adaptive Modulation with Moments based Signal-to Noise Ratio Estimator. International Journal of Simulation – Systems, Science & Technology, IJSSST. ISSN: 1473-804x. Jun 2012. vol. 13, no. 3. [published]
International Proceeding
2013
2012
[P1201] S.C.K. Lye, M.S. Arifianto, H.T. Yew, C.F. Liau, K.T.K. Teo. Performance of Signal-to-Noise Ratio Estimator with Adaptive Modulation. 6th Asia International Conference on Mathematical Modelling and Computer Simulation [Bali, Indonesia]. Proceeding of AMS 2012. ISBN: 978-1-4673-1957-7. 31 May 2012. pp. 215-219. [pdf] [published]
doi: 10.1109/AMS.2012.40 [IEEE Xplore, Scopus]
[P1202] S.C.K. Lye, S.E. Tan, Y.K. Chin, B.L. Chua, K.T.K. Teo. Performance Analysis of Intelligent Transport Systems (ITS) with Adaptive Transmission Scheme. 4th International Conference on Computational Intelligence, Communication Systems and Networks [Phuket, Thailand]. Proceeding of CICSyN 2012. ISBN: 978-0-7695-4821-0. 24-26 July 2012. pp. 418-423. [pdf] [published]
doi: 10.1109/CICSyN.2012.82 [IEEE Xplore, Scopus]
[P1203] S.E. Tan, Z.W. Siew, Y.K. Chin, S.C.K. Lye, K.T.K. Teo. Minimizing Network Coding Nodes in Multicast Tree Construction via Genetic Algorithm. 4th International Conference on Computational Intelligence, Communication Systems and Networks [Phuket, Thailand]. Proceeding of CICSyN 2012. ISBN: 978-0-7695-4821-0. 24-26 July 2012. pp. 399-404. [pdf] [published]
doi: 10.1109/CICSyN.2012.79 [IEEE Xplore, Scopus]
[P1204] S.C.K. Lye, S.E. Tan, Z.W. Siew, C.H. Wong, K.T.K. Teo. A Wireless Network with Adaptive Modulation and Network Coding in Intelligent Transportation Systems. UKSim-AMSS 6th European Modelling Symposium on Mathematical Modelling and Computer Simulation [Malta]. Proceeding of EMS 2012. ISBN: 978-1-4673-4977-2. 14-16 November 2012. pp. 412-417.
doi: 10.1109/EMS.2012.70 [IEEE Xplore, Scopus]
[P1205] S.C.K. Lye, S.E. Tan, Z.W. Siew, Y.K. Chin, K.T.K. Teo. Adaptive Modulation in Public Transport Network System with Network Coding. IEEE Global High Tech Congress on Electronics [Shenzhen, China]. Proceeding of GHTCE 2012. 18-20 November 2012. pp. 18-23.
[P1206] S.C.K. Lye, S.E. Tan, Z.W. Siew, H.T. Yew, K.T.K. Teo. Analysis and Performance Measurement of Adaptive Modulation and Coding. International Conference on Control System, Computing and Engineering [Penang, Malaysia]. Proceeding of ICCSCE 2012. ISBN: 978-1-4673-3141-8. 23-25 November 2012. pp. 268-273.
[P1207] S.E. Tan, Z.W. Siew, S.C.K. Lye, H.P. Yoong, K.T.K. Teo. Performance Analysis of Utilizing Genetic Algorithm to Minimize Coding Nodes in Wireless Networks. International Symposium on Telecommunication Technologies [Kuala Lumpur, Malaysia]. Proceeding of ISTT 2012. ISBN: 978-1-4673-4786-0. 26-28 November 2012.
[P1208] S.E. Tan, S.C.K. Lye, Z.W. Siew, A. Kiring, K.T.K. Teo. Performance Measurement of Evolutionary Routing protocol in Network Coding. International Conference on Advanced Computer Science Applications and Technologies [Kuala Lumpur, Malaysia]. Proceeding of ACSAT 2012. 26-28 November 2012.
Modelling, Simulation & Computing Laboratory (mscLab) 