TY - GEN
T1 - Factor graph EM algorithm for joint channel tracking and MAP detection of MIMO-OFDMA in fading channels
AU - Wu, Sau-Hsuan
PY - 2008/9/16
Y1 - 2008/9/16
N2 - Based on the expectation maximization (EM) algorithm, a joint channel tracking and maximal a posteriori symbol detection method is proposed for orthogonal frequency division multiple access systems employing multiple transmit and receive antennas (MIMO). Using the Forney-style factor graph (FFG), a forward-and-backward signal processing method is developed to recursively solve the EM problem for joint estimation and detection (JED) in MIMO fading channels. By proper message scheduling and passing over the FFG, simulations show that the proposed algorithm is effective for joint MIMO channel tracking and symbol detection in fast fading channels.
AB - Based on the expectation maximization (EM) algorithm, a joint channel tracking and maximal a posteriori symbol detection method is proposed for orthogonal frequency division multiple access systems employing multiple transmit and receive antennas (MIMO). Using the Forney-style factor graph (FFG), a forward-and-backward signal processing method is developed to recursively solve the EM problem for joint estimation and detection (JED) in MIMO fading channels. By proper message scheduling and passing over the FFG, simulations show that the proposed algorithm is effective for joint MIMO channel tracking and symbol detection in fast fading channels.
KW - EM
KW - Factor graph
KW - Joint estimation and detection
KW - MIMO
KW - OFDM
KW - OFDMA
UR - http://www.scopus.com/inward/record.url?scp=51449100754&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2008.4518206
DO - 10.1109/ICASSP.2008.4518206
M3 - Conference contribution
AN - SCOPUS:51449100754
SN - 1424414849
SN - 9781424414840
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 2701
EP - 2704
BT - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
T2 - 2008 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP
Y2 - 31 March 2008 through 4 April 2008
ER -