Title :
Factor graph based detection and channel estimation for MIMO-OFDM systems in doubly selective channel
Author :
Xu, Xiang ; Mathar, Rudolf
Author_Institution :
Inst. for Theor. Inf. Technol., RWTH Aachen Univ., Aachen, Germany
Abstract :
Based on the factor graph, a joint channel estimation and detection method is proposed for orthogonal frequency division multiplexing (OFDM) systems employing multiple transmit and receive antennas (MIMO). Using belief propagation, statistics of the fast varying MIMO multipath channel are utilized in estimating channel coefficients. By proper message scheduling and passing, the proposed receiver is effective for MIMO-OFDM system in fast fading frequency-selective channel.
Keywords :
MIMO communication; OFDM modulation; channel estimation; fading channels; graph theory; multipath channels; MIMO-OFDM systems; belief propagation; channel estimation; doubly selective channel; factor graph based detection; fast fading frequency-selective channel; fast varying multipath channel; message passing; message scheduling; multiple receive antennas; multiple transmit antennas; orthogonal frequency division multiplexing; Channel estimation; Correlation; Joints; MIMO; OFDM; Receivers; Time frequency analysis; MIMO; OFDM; channel estimation; factor graph; iterative receiver;
Conference_Titel :
Wireless Communication Systems (ISWCS), 2010 7th International Symposium on
Conference_Location :
York
Print_ISBN :
978-1-4244-6315-2
DOI :
10.1109/ISWCS.2010.5624320
