Title :
Maximum-likelihood carrier-frequency synchronization and channel estimation for MIMO-OFDM systems
Author :
Salari, S. ; Ahmadian, M. ; Ardebilipour, M. ; Meghdadi, V. ; Cances, J.-P.
Author_Institution :
K. N. Toosi Univ. of Technol., Tehran
Abstract :
In this paper, we propose a new scheme for maximum-likelihood (ML) estimation of both carrier- frequency offset (CFO) and channel coefficients in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. To reduce the prohibitive complexity of ML estimate, the expectation-maximization (EM) algorithm is employed. From Simulations, it is shown that the accuracy of proposed scheme is close to the Cramer-Rao bound (CRB) for both CFO and channel estimations.
Keywords :
MIMO communication; OFDM modulation; channel estimation; maximum likelihood estimation; Cramer-Rao bound; MIMO; OFDM; carrier frequency offset; carrier frequency synchronization; channel coefficients; channel estimation; expectation maximization algorithm; maximum likelihood estimation; multiple input multiple output systems; orthogonal frequency division multiplexing; Channel estimation; Frequency estimation; Frequency synchronization; MIMO; Maximum likelihood estimation; OFDM; Receiving antennas; Slot antennas; State estimation; Transmitting antennas;
Conference_Titel :
Wireless Telecommunications Symposium, 2007. WTS 2007
Conference_Location :
Pomona, CA
Print_ISBN :
978-1-4244-0696-8
Electronic_ISBN :
1934-5070
DOI :
10.1109/WTS.2007.4563307
