Abstract
In this paper we present a novel channel impulse response estimation technique for block-oriented OFDM transmission based on combining estimators: the estimates provided by a Kalman Filter operating in the time domain and a Wiener Filter in the frequency domain are optimally combined by taking into account their estimated error covariances. The frequency domain Wiener Filter smoothes Maximum-Likelihood estimates of the channel frequency response obtained by the Expectation-Maximization algorithm. Different variants of the proposed scheme are experimentally investigated in an IEEE 802.11a-like system setup. They compare favourably with known approaches from the literature resulting in reduced mean square estimation error and bit error rate. Further, robustness and complexity issues are discussed.
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References
Z. Wang and G. Giannakis, ”Wireless multicarrier communications”, IEEE Signal Processing Magazine, vol. 17, no.3, May 2000, pp. 29-48.
A. R. S. Bahai, B. R. Saltzberg and M. Ergen, Multi-Carrier Digital Communications: Theory and Applications of OFDM, Springer, 2004.
T. Roman, M. Enescu and V. Koivunen, ”Time-domain method for tracking dispersive channels in OFDM systems”, in Proc. IEEE VTC Spring, Jeju, Korea, 2003.
K. Han, S. Lee, J. Lim and K. Sung, ”Channel Estimation for OFDM with Fast Fading Channels by Modified Kalman Filter”, IEEE Trans. on Cons. Electr., vol. 50, no. 2. May 2004, pp. 443-449.
T. Kailath, A. Sayed and B. Hassibi, Linear Estimation, Prentice Hall, 2000.
X. Ma, H. Kobayashi and S. Schwartz, ”EM-based channel estimation algorithms for OFDM”, EURASIP Journal on Applied Signal Processing, 2004:10, pp. 1460-1477.
R. Duda, P. Hart, D. Stork, Pattern Classification, Wiley, 2001.
M. Lasry and R. Stern, ”A posteriori estimation of correlated jointly gaussian mean vectors”, IEEE Trans. Pattern Analysis Machine Intell., vol. PAMI-6, no. 4. July 1984, pp. 530-535.
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Bevermeier, M., Haeb-Umbach, R. (2007). Combined time and frequency domain OFDM channel estimation. In: Plass, S., Dammann, A., Kaiser, S., Fazel, K. (eds) Multi-Carrier Spread Spectrum 2007. Lecture Notes Electrical Engineering, vol 1. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6129-5_32
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DOI: https://doi.org/10.1007/978-1-4020-6129-5_32
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-6128-8
Online ISBN: 978-1-4020-6129-5
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