Suboptimal Transmission of Orthogonal Space-Time Block Codes Over Correlated Distributed Antennas

• Published in: IEEE signal processing letters Vol. 14; no. 2; pp. 89 - 92
• Main Authors: Shuangfeng Han, Shidong Zhou, Jing Wang, Li, V.O.K., Kyung Park
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.02.2007; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Allocations; Antenna theory; Antennas; Block codes; Channels; Correlation; Distributed antennas (DAs); Diversity reception; Eigenvalues; Eigenvalues and eigenfunctions; Fading; Feedback; MIMO; orthogonal space-time block codes (OSTBCs); outage probability; Outages; Ports; Topology; Transmitters; Transmitting antennas
• ISSN: 1070-9908; 1558-2361
• DOI: 10.1109/LSP.2006.882096

This letter investigates optimal transmission of orthogonal space-time block codes (OSTBCs) over distributed antennas (DAs) in non-ergodic flat Rayleigh fading channels with transmit antenna correlations. A generalized DA topology is considered, where the DAs are grouped into some geographically dispersed ports within each of which the DAs are co-located. Assuming equal power allocation within each port, the outage probability is derived. We find that minimizing the outage probability only requires the feedback of the eigenvalues of the transmit correlation matrix at the transmitter. Since it is computationally intensive to minimize the outage probability, an antenna subset selection with suboptimal power allocation scheme is proposed, whose effectiveness has been demonstrated by numerical results