Pilot-aided bayesian MMSE channel estimation for OFDM systems: Algorithm and performance analysis
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Dosyalar
Tarih
2004
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
IEEE
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper proposes a computationally efficient, pilot-aided minimum mean square error (MMSE) channel estimation algorithm for OFDM systems. The proposed approach employs a convenient representation of the discrete multipath fading channel based on the Karhunen-Loeve (KL) orthogonal expansion and estimates uncorrelated series expansion coefficients. Moreover, optimal rank reduction is achieved in the proposed approach by exploiting the optimal truncation property of the KL expansion resulting in a smaller computational load on the estimation algorithm. The performance of the proposed approach is studied through analytical and experimental results. We first consider the stochastic Cramer-Rao bound and derive the closed-form expression for the random KL coefficients. We then exploit the performance of the MMSE channel estimator based on the evaluation of minimum Bayesian MSE.
Açıklama
IEEE Communications Society;ICC Globecom
Anahtar Kelimeler
Algorithms, Attenuation, Bayes methods, Bayesian channel estimation, Bayesian methods, Channel estimation, Channel estimator, Channel capacity, Closed-form expression, Communication channels (information theory), Computational complexity, Computational load, Computational methods, Digital video broadcasting, Discrete multipath channel, Discrete multipath fading channel, Fading, Fading (radio), Fading channels, Frequency estimation, Frequency modulation, Intersymbol interference, Karhunen-Loeve orthogonal expansion, Karhunen-Loeve transforms, Least mean squares methods, Matrix algebra, Minimum Bayesian MSE, Minimum mean square error (MMSE), Minimum mean square error estimation algorithm, MMSE channel estimation, Multipath channels, OFDM, OFDM modulation, OFDM systems, Orthogonal frequency division multiplexing, Performance analysis, Pilot-aided Baysein MMSE, Pilot-aided channel estimation, Signal interference, Stochastic Cramer-Rao bound, Uncorrelated series expansion coefficients, Wireless telecommunication systems, Wireless systems
Kaynak
GLOBECOM - IEEE Global Telecommunications Conference
WoS Q Değeri
N/A
Scopus Q Değeri
N/A
Cilt
4
Sayı
Künye
Şenol, H., Çırpan, H. A. & Panayırcı, E. (2004). Pilot-aided bayesian MMSE channel estimation for OFDM systems: Algorithm and performance analysis. Paper presented at the GLOBECOM - IEEE Global Telecommunications Conference, 4 2361-2365 Vol.4. doi:10.1109/GLOCOM.2004.1378430