Efficient CFO Compensation Method in Uplink OFDMA for Mobile WiMax

Lakshmanan Muthukaruppan, Parthasharathi Mallick, Nithyanandan Lakshmanan, Sai Krishna Marepalli

Abstract


Mobile WiMax uses Orthogonal Frequency Division Multiple Access (OFDMA) in uplink where synchronization is a complex task as each user presents a different carrier frequency offset (CFO). In the Data Aided Phase Incremental Technique (DA-PIT) estimation is performed after FFT operation to use the received frequency domain pilot subcarrier information. As estimation is done in the presence of noise, there exists some offset error, which is called residual frequency offset (RFO). The Simple Time Domain Multi User Interference Cancellation scheme (SI-MUIC) is a time domain approach which takes a longer time delay to compensate the CFO effect for the last user. Decorrelation-Successive Interference Cancellation (DC-SC) and Integrated Estimation and Compensation (IEC) are frequency domain approaches that compensate the CFO effect with a more complex method for ICI cancellation. The Modified Integrated Estimation and Compensation technique (Modified IEC) is proposed for better residual CFO compensation. The proposed technique has better performance due to its efficient suppression of ICI and MUI. The difference between the CFOs of two OFDMA symbols lies within the range of RFO that is not considered in the conventional compensation techniques, such as the SI-MUIC, DC-SC and IEC compensation techniques.

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References


IEEE, IEEE standard for Local Area Metropolitan Networks, Part 16: Air interface for Fixed and Mobile Broadband Wireless Access Systems Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1, IEEE Std. 802.16e, 2006.

http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1603394: Accessed on April 2014

Barbarossa, S., Pompili, M. & Giannakis, G., Channel Independent Synchronization of Orthogonal Frequency Division Multiple Access Systems”, IEEE Journal on Selected Areas of Communications, 20(2), pp. 296-306, 2002.

González-Bayon, J. Carreras, C. & Edfors, O., A Multi-standard Frequency Offset Synchronization Scheme for 802.11n, 802.16d, LTE and DVB-T/H Systems, Journal of Computer Systems, Networks and Communication, 2010, pp. 1-9, 2010, Article ID 628657,

http://dx.doi.org/10.1155/2010/628657.

Morelli, M., Kuo, C.C.J. & Pun, M.O., Synchronization Techniques for Orthogonal Frequency Division Multiple Access (OFDMA): A Tutorial Review”, Proceedings of IEEE, 95(7), pp. 1394-1427, 2007.

Cao, Z., Tureli, U., Yao, Y.D. & Honan, P., Frequency Synchronization for Generalized OFDMA Uplink”, Proceedings of IEEE Global Telecommunications Conference, 2, pp. 1071-1075, 2004.

Bayón, J.G., Herrero, A.F. & Carreras, C., Improved Schemes for Tracking Residual Frequency Offset in DVB-T Systems, IEEE Transactions on Consumer Electronics, 56(2), pp. 415-422, 2010.

Speth, M., Fechtel, S., Fock, G., & Meyr, H., Optimum Receiver Design for OFDM-Based Broadband Transmission – Part II: A Case Study”, IEEE Transactions on Communications, 49(4), pp. 571-578, 2001.

Bayon, J.G., Herrero, A.F. & Carreras, C., A Reduced Complexity Scheme for Carrier Frequency Synchronization in Uplink 802.16e OFDMA, EURASIP Journal on Advances in Signal Processing, 218, pp. 1-10, 2012.

Sun, P. & Zhang, L., Low Complexity Pilot Aided Frequency Synchronization for OFDMA Uplink Transmission”, IEEE Transactions on Wireless Communication, 8(7), pp. 3758-3769, 2009.

Pun, M.O., Morelli, M. & Kuo, C.J., Maximum Likelihood Synchronization and Channel Estimation for OFDMA Uplink Transmission, IEEE Transactions on Communications, 54(4), pp. 726-736, 2006.

You, Y.H., Lee, K.T. & Kang, S.J., Pilot-Aided Frequency Offset Tracking Scheme for OFDM based DVB-T”, IEEE Transactions on Consumer Electronics, 54(3), pp. 1053-1058, 2008.

Fechtel, S. A., OFDM Carrier and Sampling Frequency Synchronization and Its Performance on Stationary and Mobile Channels, IEEE Transactions on Consumer Electronics, 46(3), pp. 438-441, 2000.

Yucek, T. & Arslan, H., Carrier Frequency Offset Compensation with Successive Cancellation in Uplink OFDMA Systems, IEEE Transactions on Wireless Communication, 6(10), pp. 3546-3551, 2007.

Huang, M., Chen, X., Zhou, S. & Wang, J., Iterative ICI Cancellation Algorithm for Uplink OFDMA System with Carrier-frequency Offset, Proceedings of IEEE Vehicular Technology Conference, 3, pp. 1613-1617, 2005.

Huang, D. & Letaief, K.B., An Interference-cancellation Scheme for Carrier Frequency Offset Correction in OFDMA Systems, IEEE Transactions on Communications, 53(7), pp. 1155-1165, 2005.




DOI: http://dx.doi.org/10.5614%2Fitbj.ict.res.appl.2016.10.2.4

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