NDLI: On Achievable Rate and Ergodic Capacity of OAF Multiple-Relay Networks with CSI

Content Provider	IEEE Xplore Digital Library
Author	Tran, T.X. Tran, N.H. Bahrami, H.R. Hang Dinh Sastry, S.
Copyright Year	2013
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Univ. of Akron, Akron, OH, USA (Tran, T.X.; Tran, N.H.; Bahrami, H.R.; Sastry, S.) \|\| Dept. of Comput. & Inf. Sci., Indiana Univ. South Bend, South Bend, IN, USA (Hang Dinh)
Abstract	This paper investigates the achievable rate and ergodic capacity of an orthogonal amplify-and-forward (OAF) half-duplex multiple-relay network with direct link where multiple relays use channel state information (CSI) to cooperate with the source and destination. The relays are subject to two types of power constraint: the total average power constraint (TAPC) and the individual average power constraint (IAPC). In the first step, by assuming a fixed input covariance matrix at the source, we derive an optimal power allocation (OPA) scheme among the relays via optimal instantaneous power amplification coefficients to maximize the achievable rate. The closed-form optimal solutions are obtained for the considered system under either the TAPC or both the TAPC and IAPC. Next, we derive the ergodic capacity by jointly optimizing the input covariance matrix and the power allocation at the relays. We show that this is a bi-level non-convex problem and solve this using Tammer decomposition method. This approach allows us to convert the original optimization problem to a master problem and a set of sub-problems that have closed-form solutions as obtained in the first step. The ergodic capacity is then obtained using an iterative water-filling-based algorithm.
Sponsorship	IEEE Vehicular Technol. Soc.
Starting Page	1
Ending Page	6
File Size	182684
Page Count	6
File Format	PDF
ISBN	9781467363372
ISSN	15502252
DOI	10.1109/VTCSpring.2013.6692654
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-06-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Relays Covariance matrices Resource management Closed-form solutions Protocols Signal to noise ratio Optimization
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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