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BER analysis of DC-SC and IEC with DA-PIT and MDA-PIT estimations

Efficient CFO estimation and compensation approach in OFDMA for uplink mobile WiMAX

M. Lakshmanan, Partha Sarathi Mallick, Lakshmanan Nithyanandan, M. Sai Krishna


Synchronization is a complex task in uplink Orthogonal Frequency Division Multiple Access (OFDMA) for Mobile WiMAX as each user presents different Carrier Frequency Offsets (CFO). Synchronization begins with the CFO estimation and followed by the compensation of residual CFO present in the received signal. This paper deals with various techniques in time and frequency domains to compensate the effect of CFO on the received signal for different estimation techniques. SImple time domain MultiUser Interference Cancellation (SIMUIC) performs in time domain. It employs delays in the compensation of CFO while synchronizing the last user. Decorrelation Successive Interference Cancellation (DC-SC) and Integrated Estimation and Compensation (IEC) perform in frequency domain for the compensation of CFO. These approaches are more complex for Inter-Carrier Interference (ICI) cancellation. In this paper, we propose a new efficient CFO compensation technique in frequency domain for different estimation methods. This technique is a modified version of IEC for reducing the CFO effect on the received signal with lesser computations. Simulation results show that the modified IEC performs better than SIMUIC, DC-SC and IEC for different estimation methods.


mobile WiMax; uplink; synchronization; carrier frequency offset; OFDMA; estimation; compensation

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IEEE standard for Local Area Metropolitan Area Networks, Part 16: Air interface for Fixed and Mobile Broadband Wireless Access Systems - Amendment for Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands, IEEE Std. 802.16e, 2008. DOI:

Barbarossa, S.; Pompili, M.; Giannakis, G. “Channel-independent synchronization of orthogonal frequency division multiple access systems,” IEEE J. Selected Areas Commun., v.20, n.2, p.474, 2002. DOI:

Gonzalez-Bayon, J.; Carreras, C.; Edfors, O. “A multistandard frequency offset synchronization scheme for 802.11n, 802.16d, LTE, and DVB-T/H systems,” J. Computer Systems, Networks Commun., v.2010, Article ID 628657, p.1, 2010. DOI:

Morelli, M.; Kuo, C.-C.J.; Pun, M.-O. “Synchronization techniques for orthogonal frequency division multiple access (OFDMA): A tutorial review,” Proc. IEEE, v.95, n.7, p.1394, 2007. DOI:

Cao, Z.; Tureli, U.; Yao, Y.-D.; Honan, P. “Frequency synchronization for generalized OFDMA uplink,” Proc. of IEEE Global Telecommunications Conf., 29 Nov.-3 Dec. 2004, Dallas, USA. IEEE, 2004, v.2, p.1071-1075. DOI:

González-Bayón, Javier; Fernández-Herrero, Angel; Carreras, Carlos. “Improved schemes for tracking residual frequency offset in DVB-T systems,” IEEE Trans. Consumer Electronics, v.56, n.2, p.415, 2010. DOI:

Speth, Michael; Fechtel, Stefan; Fock, Gunnar; Meyr, Heinrich. “Optimum receiver design for OFDM-based broadband transmission. II. A case study,” IEEE Trans. Commun., v.49, n.4, p.571, 2001. DOI:

Gonzalez-Bayon, Javier; Fernandez-Herrero, Angel; Carreras, Carlos. “A reduced complexity scheme for carrier frequency synchronization in uplink 802.16e OFDMA,” EURASIP J. Advances Signal Processing, v.218, p.1, 2012. DOI:

Sun, P.; Zhang, L. “Low complexity pilot aided frequency synchronization for OFDMA uplink transmission,” IEEE Trans. Wireless Commun., v.8, n.7, p.3758, 2009. DOI:

You, Y.-H.; Lee, K.-T.; Kang, S.-J. “Pilot-aided frequency offset tracking scheme for OFDM-Based DVB-T,” IEEE Trans. Consum. Electron., v.54, n.3, p.1053, 2008. DOI:

Fechtel, S.A. “OFDM carrier and sampling frequency synchronization and its performance on stationary and mobile channels,” IEEE Trans. Consum. Electron., v.46, n.3, p.438, 2000. DOI:

Yucek, T.; Arslan, H. “Carrier frequency offset compensation with successive cancellation in uplink OFDMA systems,” IEEE Trans. Wireless Commun., v.6, n.10, p.3546, 2007. DOI:

Huang, M.; Chen, X.; Zhou, S.; Wang, J. “Iterative ICI cancellation algorithm for uplink OFDMA system with carrier-frequency offset,” Proc. of IEEE Veh. Technol. Conf., 28 Sept. 2005, Dallas, USA. IEEE, 2005, v.3, p.1613-1617. DOI:

Huang, D.; Letaief, K.B. “An interference-cancellation scheme for carrier frequency offsets correction in OFDMA systems,” IEEE Trans. Commun., v.53, n.7, p.1155, 2005. DOI:

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