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Basis Expansion Models Analysis for MIMO/OFDM Systems

K.V.N. Kavitha, Sibaram Khara, J.V. Rama Krishna Reddy

Abstract


We consider Channel estimation for multiple-input multiple-output/orthogonal frequency-division multiplexing (MIMO/ OFDM) systems in time-varying wireless channels using superimposed training (ST). By using a discrete prolate spheroidal basis expansion model (DPSS) and truncated discrete fourier bases expansion models (Fourier-BEM) for representing the time varying channel. Based on these models, a weighted average approach is adopted for estimating linear time varying (LTV) channels for OFDM symbols. The performance analysis between two BEM models based on Mean square error (MSE) is present in this paper. Simulation results show that the DPSS-BEM model outperforms the Fourier Bases expansion model.

Keywords


Basis Expansion Models (BEMS), MIMO/OFDM, Slepian Sequences, Superimposed Training.

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References


T.Zemen and C.F. Mecklenbrauker,”Time-variant channel estimation using discrete prolate spheroidal sequences ,”IEEE Trans signal process., vol.53,no.9,pp. 3597-3607,sep 2005.

G.B. Giannakis, and C.Tepedelenlioglu,”Basis expansion models bnd diversity techniques for blind identification and equalization of Time-varying channels,” proc.IEEE, vol.86, pp. 1969-1986,oct.1988.

W.Hou and B.Chen,” ICI cancellation for OFDM Communication systems in Time-varying multipath fading channels,” IEEE Trns.Wireless Commun., vol.4, no.5, pp.2100-2110, sep.2005.

W.G. Jeon,K,H.Chang, and Y.S. Cho, “An qualization technique for orthogonal frequency division multiplexing systems in time-variant multi path channel,”IEEE Trans. Commun., col.47, no.1,pp.27-32,1999.

G.T.Zhou, M. Viberg, and T.McKelvey, “A first order statistical method for channel estimation,” IEEE Signal process.Lett., vol.10,no.3, pp. 57-60, Mar.2003.

Q.Yang and K.S Kwak,” Superimpose Pilot-aided channel estimation for mobile OFDM,” Electron. Lett., vol.42, no.12, pp.722-724, June 2006.

Q.Y.Zhu and Z.Q.Liu,”Optimal pilot superimposition for zero-padded block transmissions,” IEEE Tran. Wireless commun. vol.5, no.8, pp.2194-2201, Aug.2 006.

T.Keller and L.Hanzo, “Adaptive multi carrier modulation: a convenient frame work for time-frequncy processing in wireless communications,” proc. IEEE, vol.88, no.5, pp. 611-640, May 2000.

I.Barhumi,G.Leus, and M.Moonen,”Optimal training design for MIMO OFDM systems in mobile wireless channels,”IEEE Trans. Signal process., vol.51, no.6, pp. 1615-1624, June 2003.

N.Chen and G.T.Zhou,”Superimposed training for OFDM: a peak-to-average power ratio analysis,” IEEE Trans. Signal Process., vol.54, no.6, pp.2277-2287, June 2006.

L. Song and J.K. Tugnait, “On designing time-multiplexed pilots for doubly-selective channel estimation using descrete prolate spheroidal basis expansion models,” in Proc. IEEE ICASSP Conf., Honolulu, HI, Apr.2007,pp. III -433- III -436.

G.B. Gianakis, Y.Hua, P. Stoica, and L. Tong, Eds., Signal Procssing Advanced in Wireless & Mobile Communications, vol. 1, Trenda in Channel Estimation and Equalization. Upper Saddle River, NJ: Prentice-Hall, 2001.

G. B. GIannaiks and C. Tepedelenlioolu, Basis expansion models and diversity techniques for blind identification and equalization of time-varying channels,” Proc. IEEE, vol.86, no.10,pp.1969-1986, Oct. 1988.

K. Josian and D. Rajan, “Bandwidth efficient channel estimation using super imposed pilots in OFDM systems, “ IEEE Trans. Wireless Commun., vol.6, no.6, pp.2234-2245, Jun. 2007.

H. Kim and J, K. Tugnait, “Doubly-selective MIMO channel estimation using exponential basis models and subblock tracking , “in Proc. 42nd Annu. Conf. Inf.Sci. Syst., Mar. 19-21, 2008, pp. 1258-1261.

X. Ma, G. B. Giannakis, and S. Ohno, “Optimal training for block tramission over doubly selective wireles fading channels, “IEEE Trans. Signal Process., Vol. 51, no.5, pp.1351-1366,May 2003.

J. G. Proakis, Digital Communications, 4th ed. New York: McGraw-Hill, 2001.

A. M. Sayeed and B. Aazahang, “Joint multipath-Doppler diversity in mobile wireless communications, “IEEE Trans. Commun. Vol.47, no.1, pp.123-132, Jan.1999.

W.Jakes, Microwave mobile communications Wiley:Newyork, 1974.

L. Yang, X. ma, and G. B. Giannakis, “Optimal training for MIMO fading channels with time-and frequency selective, “in Proc. Int .Conf.Acoust, Speech,Signal Process.,May 17-21,2004,vol.3,pp.821-824.


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