標題: Factor graph EM algorithm for joint channel tracking and MAP detection of MIMO-OFDMA in fading channels
作者: Wu, Sau-Hsuan
電信工程研究所
Institute of Communications Engineering
關鍵字: factor graph;MIMO;OFDM;OFDMA;EM;joint estimation and detection
公開日期: 2008
摘要: 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.
URI: http://hdl.handle.net/11536/2552
ISBN: 978-1-4244-1483-3
ISSN: 1520-6149
期刊: 2008 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, VOLS 1-12
起始頁: 2701
結束頁: 2704
Appears in Collections:Conferences Paper