Convex Optimization
Subcarrier pairing for amplify-and-forward and decode-and-forward OFDM relay links
IEEE Communications Letters
End-to-end outage minimization in OFDM based linear relay networks
IEEE Transactions on Communications
On the optimal power control of parallel OFDM relaying networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Joint power allocation and relay selection in cooperative networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Power Allocation Schemes for Amplify-and-Forward MIMO-OFDM Relay Links
IEEE Transactions on Wireless Communications
Amplify-and-Forward Cooperative Diversity Schemes for Multi-Carrier Systems
IEEE Transactions on Wireless Communications - Part 2
Resource Allocation for Delay Differentiated Traffic in Multiuser OFDM Systems
IEEE Transactions on Wireless Communications
Relay-based deployment concepts for wireless and mobile broadband radio
IEEE Communications Magazine
Cooperative communication in wireless networks
IEEE Communications Magazine
Multihop Relaying for Broadband Wireless Mesh Networks: From Theory to Practice
IEEE Communications Magazine
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
Joint optimization of relay strategies and resource allocations in cooperative cellular networks
IEEE Journal on Selected Areas in Communications
Cross-layer resource allocation over wireless relay networks for quality of service provisioning
IEEE Journal on Selected Areas in Communications
IEEE Transactions on Wireless Communications
Resource allocation for QOS-aware OFDMA cellular networks with cooperative relaying
WSEAS TRANSACTIONS on COMMUNICATIONS
Resource Allocation Schemes for the Heterogeneous OFDMA System with Multiple Ad Hoc Relays
Wireless Personal Communications: An International Journal
Joint optimal AF relay assignment and power allocation in wireless cooperative networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Joint resource allocation for lifetime-aware cooperative multi-carrier DF system
International Journal of Automation and Computing
Subcarrier allocation in multi-hop orthogonal frequency division multiple access wireless networks
Computers and Electrical Engineering
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In this paper, we study the joint allocation of three types of resources, namely, power, subcarriers and relay nodes, in multi-relay assisted dual-hop cooperative OFDM systems. All the relays adopt the amplify-and-forward protocol and assist the transmission from the source to destination simultaneously but on orthogonal subcarriers. The objective is to maximize the system transmission rate subject to individual power constraints on each node or a total network power constraint. We formulate such a problem as a subcarrier-pair based resource allocation that seeks the joint optimization of subcarrier pairing, subcarrier-pair-to-relay assignment, and power allocation. Using a dual approach, we solve this problem efficiently in an asymptotically optimal manner. Specifically, for the optimization problem with individual power constraints, the computational complexity is polynomial in the number of subcarriers and relay nodes, whereas the complexity of the problem with a total power constraint is polynomial in the number of subcarriers.We further propose two suboptimal algorithms for the former to trade off performance for complexity. Simulation studies are conducted to evaluate the average transmission rate and outage probability of the proposed algorithms. The impact of relay location is also discussed.