Resource Allocation

Efficient Low Complexity Resource Allocation in OFDMA systemPresented byVaibhav GaikwadRoll no.11PG Communication NetworkD. Y. Patil College of Engineering, Akurdi, Pune- 411044Dept. of Electronics & telecommunication Engg.Seminar III on Seminar GuideDr. Manish Sharma

ContentsOFDMA Background Pros and ConsLiterature surveyObjectivesPower Allocation ConclusionReferences

6-1-2015Efficient Resource Allocation in OFDMA system*

Efficient Resource Allocation in OFDMA system

BackgroundOFDM:Orthogonal Frequency Division Multiplexing, is a form of modulation that divides carrier in narrowband close-spaced subcarriers.

6-1-2015Efficient Resource Allocation in OFDMA system*Fig: OFDM symbol assignment


OFDM PROS & CONSPros:Immunity to selective fadingSpectrum efficiencyResilient to narrow-band effectsResilient to ISI

ConsHigh peak to average power ratio6-1-2015Efficient Resource Allocation in OFDMA system*


Literature Survey6-1-2015Efficient Resource Allocation in OFDMA system*

AuthorsTitleYearProposed workFourat Haider, et al.Energy-Efficient Subcarrier-and-Bit Allocation inMulti-User OFDMA Systems2008trade-off between spectral and energy efficiencies is analysedDerrick Wing Kwan Ng, et alEnergy-Efficient Resource Allocation in MultiuserOFDM Systems with Wireless Information andPower Transfer2004Lagrange dual decompositionAtta Rahman, et alA Real Time Adaptive Resource Allocation Schemefor OFDM Systems Using GRBF-Neural Networksand Fuzzy Rule Base System2014Allocation based on FRBS and GRBF


Conti6-1-2015Efficient Resource Allocation in OFDMA system*

AuthorTitleyearProposed workJianwei Huang, et alDownlink Scheduling and Resource Allocation forOFDM Systems2013Efficient Power Allocation in OFDMA system and Low complexity heuristics allocationWinston W. L. Ho,et alOptimal Resource Allocation for MultiuserMIMO-OFDM Systems with User Rate Constraints2011dual proportional fairnessIan C. Wong, et alA Low Complexity Algorithm for ProportionalResource Allocation in OFDMA Systems2011Linear and root finding


ObjectiveTo study OFDM systemEvaluated performance of OFDM system Efficient Power Allocation for K Users and N Subcarriers6-1-2015Efficient Resource Allocation in OFDMA system*


Resource Allocation6-1-2015Efficient Resource Allocation in OFDMA system*


FormulationObjective of Resource Allocation is Formulated:



Steps for Resource AllocationInitialization and Determining number of Subcarrier and UsersSubcarrier assignment to each userPower Allocation among and for Kth user6-1-2015Efficient Resource Allocation in OFDMA system*


Power Allocation for single UserOptimal Power allocation for single user by water filling algorithm



ResultsTotal Capacity vs no. of users in OFDMA system [6]6-1-2015Efficient Resource Allocation in OFDMA system*


ResultsNormalized capacity ratio per user for 16 user [6]6-1-2015Efficient Resource Allocation in OFDMA system*


ResultsAverage time require for root finding and linear [6]*Efficient Resource Allocation in OFDMA system6-1-2015


ConclusionThus OFDM system have studied for Power Allocation.In Resource allocation three resources should be optimized subcarrier, Power of subcarrier and power of user.When root finding and linear algorithm is compare with each other we can say root finding perform better than linear.



Reference6-1-2015Efficient Resource Allocation in OFDMA system*

Sr. No.Reference1Zukang Shen, Jeffrey G. Andrews, Member and Brian L. Evans, Adaptive Resource Allocation in Multiuser OFDM Systems With Proportional Rate Constraints, IEEE Transactions On Wireless Communications, Vol. 4, No. 6, November 20082Atta Rahman, Ijaz Qureshi, Aqdas Malik, and Muhammad Naseem, A Real Time Adaptive Resource Allocation Scheme for OFDM Systems Using GRBF-Neural Networksand Fuzzy Rule Base System, The International Arab Journal of Information Technology, Vol. 11, No. 6, November 20143Jianwei Huang, Vijay G. Subramanian, Rajeev Agrawal, and Randall A. Berry, Downlink Scheduling and Resource Allocation forOFDM Systems, IEEE Transactions On Wireless Communications, Vol. 8, No. 1, January 20094Winston W. L. Ho and Ying-Chang Liang,Optimal Resource Allocation for MultiuserMIMO-OFDM Systems with User Rate Constraints,Proceeding of Vehicular Technology Conference,, pp. 101109, 2008.


Reference 6-1-2015Efficient Resource Allocation in OFDMA system*

Sr. noReference5Fourat Haider, Cheng-Xiang Wang, Harald Haas, Erol Hepsaydir and Xiaohu Ge, Energy-Efficient Subcarrier-and-Bit Allocation in Multi-User OFDMA Systems , IEEE 75th Vehicular Technology Conference (VTC Spring), 2012, vol. 20, no. 5, pp. 1-5, 2008.6Ian C. Wong, Zukang Shen, Brian L. Evans, and Jeffrey G. Andrews, A Low Complexity Algorithm for Proportional Resource Allocation in OFDMA Systems,preceeding of International Conference on Signal Processing Systems, pp 1-6 20117Derrick Wing Kwan Ng, Ernest S. Lo, and Robert Schober , Energy-Efficient Resource Allocation in MultiuserOFDM Systems with Wireless Information andPower Transfer, Wireless Communications and Networking Conference (WCNC),pp 3823 - 3828, 2013


THANK YOU6-1-2015Efficient Resource Allocation in OFDMA system*


Appendix6-1-2015Efficient Resource Allocation in OFDMA system*


Wi-Fi based Indoor Positioning System*12-11-2014DYPCOE, AkurdiWi-Fi based Indoor Positioning SystemDYPCOE, AkurdiWi-Fi based Indoor Positioning SystemWi-Fi based Indoor Positioning System12-11-2014DYPCOE, Akurdi*DYPCOE, AkurdiWi-Fi based Indoor Positioning SystemWi-Fi based Indoor Positioning System12-11-2014DYPCOE, Akurdi*DYPCOE, Akurdi

Resource Allocation

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