Power allocation strategies for distributed space-time codes in amplify-and-forward mode
EURASIP Journal on Advances in Signal Processing
Distributed power control for cooperative relaying with fixed amplifying gain
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Distributed power allocation schemes for amplify-and-forward networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Sub-optimum distributed power allocation for parallel relay networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Cooperative MAC protocol with distributed relay actuation
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
A joint source and relay power allocation scheme for a class of MIMO relay systems
IEEE Transactions on Signal Processing
Optimal power allocation for DAF cooperative communication with multiple relays
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
On the optimal power control of parallel OFDM relaying networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Relay selection and power allocation in cooperative cellular networks
IEEE Transactions on Wireless Communications
Minimum energy consumption design of a two-hop relay network for QoS guarantee
WTS'10 Proceedings of the 9th conference on Wireless telecommunications symposium
The cost of using cooperation in a wireless network
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Energy-efficient relaying strategy with network coding in two-way parallel channels
ISRN Communications and Networking
Optimal design of virtual MIMO for WSN performance improvement
WSEAS TRANSACTIONS on COMMUNICATIONS
Wireless Communications & Mobile Computing
Opportunistic Relaying for MIMO Amplify-and-Forward Cooperative Networks
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
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We consider a source-destination pair assisted by parallel regenerative decode-and-forward relays operating in orthogonal channels. We investigate distributed power allocation strategies for this system with limited channel state information at the source and the relay nodes. We first propose a distributed decision mechanism for each relay to individually make its decision on whether to forward the source data. The decision mechanism calls for each relay that is able to decode the information from the source to compare its relay-to-destination channel gain with a given threshold. We identify the optimum distributed power allocation strategy that minimizes the total transmit power while providing a target signal-to-noise ratio at the destination with a target outage probability. The strategy dictates the optimum choices for the source power as well as the threshold value at the relays. Next, we consider two simpler distributed power allocation strategies, namely the passive source model where the source power and the relay threshold are fixed, and the single relay model where only one relay is allowed to forward the source data. These models are motivated by limitations on the available channel state information as well as ease of implementation as compared to the optimum distributed strategy. Simulation results are presented to demonstrate the performance of the proposed distributed power allocation schemes. Specifically, we observe significant power savings with proposed methods as compared to random relay selection.