Wireless Communications
Channel-Aware Earliest Deadline Due Fair Scheduling for Wireless Multimedia Networks
Wireless Personal Communications: An International Journal
Optimally joint subcarrier matching and power allocation in OFDM multihop system
EURASIP Journal on Advances in Signal Processing
EURASIP Journal on Wireless Communications and Networking - Special issue on cooperative communications in wireless networks
Subcarrier pairing for amplify-and-forward and decode-and-forward OFDM relay links
IEEE Communications Letters
Effective capacity maximization in multi-antenna channels with covariance feedback
IEEE Transactions on Wireless Communications
Enhancing the Performance of Video Streaming in Wireless Mesh Networks
Wireless Personal Communications: An International Journal
Joint Subcarrier Pairing and Power Allocation for OFDM Transmission With Decode-and-Forward Relaying
IEEE Transactions on Signal Processing
Effective capacity: a wireless link model for support of quality of service
IEEE Transactions on Wireless Communications
Quality-of-Service Driven Power and Rate Adaptation over Wireless Links
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Capacity theorems for the relay channel
IEEE Transactions on Information Theory
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
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 Journal on Selected Areas in Communications
Wireless Personal Communications: An International Journal
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In this paper, we investigate the quality-of-service (QoS) driven subcarrier pairing and power allocation for two-hop decode-and-forward (DF) OFDM relay systems. By integrating the concept of effective capacity, our goal is to maximize the system throughput subject to a given delay-QoS constraint. Based on whether the destination can receive the signal transmitted by the source, we consider two scenarios, i.e. OFDM DF relay systems without diversity and OFDM DF relay systems with diversity, respectively. For OFDM DF relay systems without diversity, we demonstrate that the jointly optimal subcarrier pairing and power allocation can be implemented with two separate steps. For OFDM DF relay systems with diversity, we propose an iterative algorithm to achieve jointly optimal subcarrier pairing and power allocation. Furthermore, we find that the analytical results show different conclusions for the two types of OFDM relay systems. For OFDM relay systems without diversity, the optimal power allocation depend on not only the channel quality of subcarriers but also the delay QoS constraints, while the optimal subcarrier pairing just depends on the channel quality of subcarriers. For OFDM relay systems with diversity, both the optimal subcarrier pairing and power allocation depend on the channel quality of subcarriers and the delay QoS constraints. Simulation results show that our proposed scheme offers a superior performance over the existing schemes.