Multiuser Relaying over Mixed RF/FSO Links
Journal article, 2014
A multiuser dual-hop relaying system over mixed radio frequency/free-space optical (RF/FSO) links is investigated. Specifically, the system consists of m single-antenna sources, a relay node equipped with n >= m receive antennas and a single photo-aperture transmitter, and one destination equipped with a single photo-detector. RF links are used for the simultaneous data transmission from multiple sources to the relay. The relay operates under the decode-and-forward protocol and utilizes the popular V-BLAST technique by successively decoding each user's transmitted stream. Two common norm-based orderings are adopted, i.e., the streams are decoded in an ascending or a descending order. After V-BLAST, the relay retransmits the decoded information to the destination via a point-to-point FSO link in m consecutive timeslots. Analytical expressions for the end-to-end outage probability and average symbol error probability of each user are derived, while closed-form asymptotic expressions are also presented. Capitalizing on the derived results, some engineering insights are manifested, such as the coding and diversity gain of each user, the impact of the pointing error displacement on the FSO link and the V-BLAST ordering effectiveness at the relay.
dual-hop communication
Electrical & Electronic
GENERALIZED SELECTION CRITERION
PERFORMANCE
ANALYSIS
ordered successive interference cancellation (SIC)
DIVERSITY
V-BLAST
Telecommunications
SPACE OPTICAL LINKS
V-BLAST reception
Decode-and-forward (DF)
OUTAGE
MIMO SYSTEMS
ATMOSPHERIC-TURBULENCE
WIRELESS
Engineering
mixed RF/FSO systems
FADING CHANNELS
Author
N. I. Miridakis
University of Piraeus
Piraeus University of Applied Sciences
Michail Matthaiou
Chalmers, Signals and Systems, Signal Processing and Biomedical Engineering
G. K. Karagiannidis
Khalifa University
Aristotle University of Thessaloniki
IEEE Transactions on Communications
0090-6778 (ISSN) 15580857 (eISSN)
Vol. 62 5 1634-1645 6775014Subject Categories
Telecommunications
DOI
10.1109/tcomm.2014.022314.130762