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Harjeet Singh
Savina Bansal

Author(s) and WSEAS

Harjeet Singh
Savina Bansal

WSEAS Transactions on Communications

Print ISSN: 1109-2742
E-ISSN: 2224-2864

Volume 16, 2017

Notice: As of 2014 and for the forthcoming years, the publication frequency/periodicity of WSEAS Journals is adapted to the 'continuously updated' model. What this means is that instead of being separated into issues, new papers will be added on a continuous basis, allowing a more regular flow and shorter publication times. The papers will appear in reverse order, therefore the most recent one will be on top.

Feedback Based Channel Estimation for Time Varying Multipath System

AUTHORS: Harjeet Singh, Savina Bansal

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ABSTRACT: Channel estimation is a crucial design issue for faithful reception of high data rate mobile applications in a wireless communication system. Channel estimation algorithms, mainly available in literature, include least square (LS) estimation, linear minimum mean squared error (LMMSE) estimation, and low rank linear minimum mean squared error (LRMMSE) estimation with varying degrees of performance. MMSE-based algorithms offer higher accuracy though at the cost of complexity in comparison to the low complexity LS algorithm. In this work, we propose an algorithm based on the LS channel estimation technique by using decision based feedback technique to improve upon its estimation capabilities and still retaining its simplicity. To examine its usefulness especially for wireless mobile applications, performance in terms of the symbol error rate is analyzed with varying Doppler frequency and delay parameters, which is found to be quite optimistic in comparison to LMMSE and LRMMSE algorithms.

KEYWORDS: Pilots symbols, Symbol error rate, Doppler frequency shift, OFDM


[1] Tiejun Wang ,J. G. Proakis , E. Masry ,J. R. Zeidler, “Performance degradation of OFDM systems due to Doppler spreading”, IEEE Transactions on Wireless Communications, Vol.5,Issue 6,pp.1422 – 1432, June 2006.

[2] Ye (Geoffrey) Li , “Pilot-symbol-aided channel estimation for OFDM in wireless systems,” IEEE Transactions on Vehicular Technology, vol. 49, no. 4, pp.1207-1215, July 2000.

[3] Sinem Coleri, Mustafa Ergen, Anuj Puri, and Ahmad Bahai, “Channel estimation techniques based on pilot arrangement in OFDM Systems”, IEEE Transactions On Broadcasting, Vol. 48, No. 3, pp. 223-229,Sep. 2002.

[4] Olutayo O.Oyerinde and Stanley H. Mneney, “Review on channel estimation for wireless Communication systems,” IETE Technical Review Vol. 29, issue 4,p.p 282-298, Jul –Aug. 2012

[5] J.-J. van de Beek, O. Edfors, M. Sandell, S. K. Wilson, and P. O. Borjesson ,“On channel estimation in OFDM systems,” Proceedings IEEE 45th Vehicular Technology Conference., Chicago, pp. 815–819,July 1995.

[6] Chi Kuo And Jin-Fu Chang, “Equalization and channel estimation for OFDM systems in timevarying multipath channels”, Personal, Indoor and Mobile Radio Communications,2004.PIMRC2004,15th IEEE International Symposium on,Vol.1,pp. 474-478 sept.2004

[7] Morelli M, Mengali U,” A Comparison of Pilotaided channel estimation methods for OFDM systems”, IEEE Transactions on Signal Processing, vol.49, issue 12, pp. 3065- 3073,Dec.2001

[8] Franz Hlawatsch and Gerald Matz, “Wireless communication over rapidly time varying channels”,Burlington:Academic Press (Elsevier), 2001.

[9] Taewon Hwang, Chenyang Yang, “OFDM and its wireless applications: a survey”, IEEE Transactions on Vehicular Technology, vol. 58, no. 4, pp. 1673-1694,May 2009.

[10] Xenofon G. Doukopoulos and George V. Moustakides, “Blind adaptive channel estimation in OFDM systems”, IEEE Transactions on Wireless Communications, Vol.5, no-7,pp. 1716- 1725,July 2006.

[11] Auer G and Karipidis E, “Pilot aided channel estimation for OFDM: a separated approach for smoothing and interpolation”, IEEE International Conference on Communications, vol. 4, pp. 2173-2178, May 2005.

[12] Miao H and Juntti M, “Space-time channel estimation and performance analysis for wireless MIMO-OFDM systems with spatial correlation,” IEEE Transactions on Vehicular Technology, vol. 54, no. 6, pp. 2003–2016, Nov. 2005.

[13] JJ Van De Beek, O Edfors, M Sandell, SK Wilson, PO Borjesson , “On channel estimation in OFDM systems”, Vehicular Technology Conference, 1995 IEEE 45th , volume-2,p.p 815- 819.

[14] Hsieh, M.-H., & Wei, C.-H, “Channel estimation for OFDM systems based on comb-type pilot arrangement in frequency selective fading channels”, IEEE Transactions on Consumer Electronics, Vol.44, Issue.1, pp.- 217–225,March 1998.

[15] O. Edfors, M. Sandell ,J. J. van de Beek ,S. K. Wilson “OFDM channel estimation by singular value decomposition”, IEEE Transactions on Communications, Vol.46 , Issue 7,pp. 931 – 939, July 1998.

[16] Pei Chen and Hisashi Kobayashi,”Maximum likelihood channel estimation and signal detection for OFDM systems” Proceeding of IEEE International conference of Communication, vol. 3, pp. 1640–1645, May 2002.

[17] Kabir. W, “Orthogonal Frequency Division Multiplexing (OFDM)”, IEEE International conference on Microwave China-Japan Joint at Shanghai, pp. 178-184,2008.

[18] IEEE standard 802.11a, “Wireless LAN medium access control (MAC) and physical layer (phy) specifications: high-speed physical layer in the 5GHZ band IEEE,” IEEE standard 802.11b 1999.

[19] Jiayan Zhang, Honglin Zhao And Xaio Liang,“ Sparse channel estimation orthogonal matching pursuit in frequency domain”, IEEE international conference on computer science and automation engineering (CSAE),vol.3 ,pp. 765 – 768,2012

[20] Filippo Zuccardi Merli And Giorgio Matteo Vitetta,”Iterative Ml-based estimation of carrier frequency offset, channel impulse response and data in OFDM transmissions,” IEEE Transactions on Communications, Vol. 56,no. 3, pp. 479-506,2008.

[21] Luca Rugini, And Paolo Banelli, “BER of OFDM systems impaired by carrier frequency offset in multipath fading channels,” IEEE Transactions on Wireless Communications, vol. 4, no. 5, pp. 2279-2288,Sep . 2005.

[22] Robertson, P., & Kaiser, S, “The effects of Doppler spreads in OFDM(A) mobile radio systems”, Proceedings of the IEEE Vehicular Technology Conference vol. 1, Amsterdam, The Netherlands, pp. 329–333, September 1999.

[23] Wang, Z., & Giannakis, G. B, “Wireless multicarrier communications: Where Fourier meets Shannon”, IEEE Signal Processing Magazine, vol.17,no-3, pp.29–48,May 2000

[24] Meng-Han Hsieh And Che-Ho We,” Channel estimation for OFDM systems based on combtype pilot arrangement in frequency selective fading channels”, IEEE Transactions on Consumer Electronics, vol.44, issue 1 ,pp. 217 – 225,Feb. 1998.

[25] Samarendra Nath Sur, Rabindranath Bera and Bansibadan Maji, “ Decision feedback equalization for MIMO systm”, Advances in intelligent system and computing ,springer,volume 343,p.p 205-212.

[26] Roozbeh Mohammadian, Arash Amini, Babak Hossein Khalaj, “Deterministic pilot design for sparse channel estimation in MISO/multi-user OFDM systems”, IEEE Transactions on Wireless Communications,volume16,issue 1,p.p 129-140, Jan-2017 2016.

WSEAS Transactions on Communications, ISSN / E-ISSN: 1109-2742 / 2224-2864, Volume 16, 2017, Art. #29, pp. 272-280

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