Title :
Transmit precoding for MIMO relay systems with partial CSI under correlated fading
Author :
Wen, Chao-Kai ; Wong, Kai-Kit ; Ng, Chris T K
Author_Institution :
Inst. of Commun. Eng., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
In this paper, we study the transmit precoding problem for multiple-input multiple-output (MIMO) two-hop amplify-and-forward (AF) relay systems, where the source terminal (ST), relay terminal (RT), and destination terminal (DT) are equipped with multiple correlated antennas and there exists a direct link between ST and DT. It is assumed that DT has perfect channel state information (CSI) while ST and RT only have the channel covariance information (CCI). We derive the asymptotic mutual information (MI) expressions for the MIMO-AF relay channel for any given signaling input distributions in the large-system limit. Using the asymptotic results, we design the optimal source covariance matrix and the relay precoding matrix that maximizes the asymptotic MI of the system if CCI is exploited.
Keywords :
channel coding; covariance matrices; fading channels; precoding; radio repeaters; MIMO relay systems; amplify-and-forward relay systems; asymptotic mutual information; channel covariance information; channel state information; correlated fading; destination terminal; multiple correlated antennas; optimal source covariance matrix; relay precoding matrix; relay terminal; source terminal; transmit precoding; Channel capacity; Channel state information; Chaotic communication; Covariance matrix; Fading; Linear matrix inequalities; MIMO; Mutual information; Radiofrequency interference; Relays;
Conference_Titel :
Wireless Communications & Signal Processing, 2009. WCSP 2009. International Conference on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4244-4856-2
Electronic_ISBN :
978-1-4244-5668-0
DOI :
10.1109/WCSP.2009.5371698