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QEP Based Solution for Power Allocation in Amplify and Forward Networks

Sarma, Siddhartha and Kuri, Joy (2015) QEP Based Solution for Power Allocation in Amplify and Forward Networks. In: IEEE COMMUNICATIONS LETTERS, 19 (10). pp. 1774-1777.

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Official URL: http://dx.doi.org/10.1109/LCOMM.2015.2456921


The problem of cooperative beamforming for maximizing the achievable data rate of an energy constrained two-hop amplify-and-forward (AF) network is considered. Assuming perfect channel state information (CSI) of all the nodes, we evaluate the optimal scaling factor for the relay nodes. Along with individual power constraint on each of the relay nodes, we consider a weighted sum power constraint. The proposed iterative algorithm initially solves a set of relaxed problems with weighted sum power constraint and then updates the solution to accommodate individual constraints. These relaxed problems in turn are solved using a sequence of Quadratic Eigenvalue Problems (QEP). The key contribution of this letter is the generalization of cooperative beamforming to incorporate both the individual and weighted sum constraint. Furthermore, we have proposed a novel algorithm based on Quadratic Eigenvalue Problem (QEP) and discussed its convergence.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords: Amplify and forward relaying; power allocation; quadratic eigenvalue problem
Department/Centre: Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited: 19 Nov 2015 04:51
Last Modified: 19 Nov 2015 04:51
URI: http://eprints.iisc.ac.in/id/eprint/52769

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