Title :
Turbo Receiver Design with EM-Based Frequency Synchronization 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 :
A maximum-likelihood estimator (MLE) based on the expectation-maximization (EM) algorithm is presented to estimate the carrier frequency offset (CFO) in multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems. This MLE estimator is also capable to accommodate any space-time coded (STC)-OFDM transmission. Then by incorporation of proposed ML estimator into the initialization step of conventional turbo receiver, a novel turbo receiver with CFO estimation/compensation capability is developed for MIMO-OFDM systems. Simulation results are presented which clearly show the application of the proposed MLE estimator into the turbo receiver structure leads to a bit-error rate (BER) that is only slightly higher than that of a perfectly synchronized system, making it highly applicable.
Keywords :
MIMO systems; OFDM modulation; expectation-maximisation algorithm; radio receivers; space-time codes; turbo codes; MIMO-OFDM systems; bit-error rate; carrier frequency offset; expectation-maximization algorithm; frequency synchronization; maximum-likelihood estimator; multiple-input multiple-output systems; orthogonal frequency-division multiplexing systems; space-time coded transmission; turbo receiver design; Bit error rate; Fading; Frequency estimation; Frequency synchronization; MIMO; Maximum likelihood estimation; OFDM; Parity check codes; Radio transmitters; Receiving antennas;
Conference_Titel :
Signal Processing and Communications Applications, 2007. SIU 2007. IEEE 15th
Conference_Location :
Eskisehir
Print_ISBN :
1-4244-0719-2
Electronic_ISBN :
1-4244-0720-6
DOI :
10.1109/SIU.2007.4298856
