Title :
Space-Frequency-Coded MIMO OFDM Receivers Based on Gaussian Message Passing
Author :
Chou, Chia-Peng ; Wu, Chien-Hsing ; Liu, Tsung-Hsien ; Hwang, Yin-Tsung
Author_Institution :
Commun. Eng. Dept., Nat. Chung-Cheng Univ., Chiayi, Taiwan
Abstract :
Forney-style factor graphs are used for modeling space-frequency-coded MIMO OFDM systems over frequency-selective fading channels. We analyze the Gaussian message passing mechanism for the Alamouti scheme and linear transformation of the factor graph. A new decision rule is derived in terms of the mean vector and covariance matrix of modulation symbols. We employ the K-best algorithm with reduced complexity to justify the effectiveness of our receiver.
Keywords :
MIMO communication; OFDM modulation; codes; covariance matrices; fading channels; message passing; radio receivers; Alamouti scheme; Forney-style factor graphs; Gaussian message passing; K-best algorithm; MIMO OFDM receivers; covariance matrix; frequency-selective fading channels; linear transformation; modulation symbols; space frequency code; Block codes; Communications Society; Covariance matrix; MIMO; Maximum likelihood detection; Maximum likelihood estimation; Message passing; OFDM modulation; Signal processing algorithms; Vectors;
Conference_Titel :
Communications, 2009. ICC '09. IEEE International Conference on
Conference_Location :
Dresden
Print_ISBN :
978-1-4244-3435-0
Electronic_ISBN :
1938-1883
DOI :
10.1109/ICC.2009.5199467
