An efficient relay selection strategy for high speed users in cooperative diversity systems
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Performance analysis and power allocation for M-QAM cooperative diversity systems
IEEE Transactions on Wireless Communications
A Survey of Distributed Relay Selection Schemes in Cooperative Wireless Ad hoc Networks
Wireless Personal Communications: An International Journal
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A bandwidth and energy efficient cooperative diversity scheme based on quadrature signaling is proposed. The quadrature signaling is achieved by transmitting in the in-phase and quadrature components of QPSK modulation. The diversity gain and the bit error rate of the proposed cooperative diversity scheme improve with the inter-user channel quality. It is shown that the proposed scheme can achieve a diversity order of two for high inter-user signal-to-noise ratios, if the cooperating users are located within a region that permits successful cooperation. The cooperative region corresponding to a specified bit error rate is defined and derived