Diversity through coded cooperation
IEEE Transactions on Wireless Communications
A cooperative diversity scheme based on quadrature signaling
IEEE Transactions on Wireless Communications
Maximizing Cooperative Diversity Energy Gain for Wireless Networks
IEEE Transactions on Wireless Communications
Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks
IEEE Transactions on Information Theory
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
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Cooperative diversity has been proposed to form virtual antenna arrays in order to obtain spatial diversity gains. Various relay selection strategies in cooperative diversity systems were proposed but they are efficient for static or low speed users. An efficient relay selection strategy for systems with high speed users is presented in this paper by dividing users into three groups according to their moving speeds and directions. The relays for cooperation are selected from the same group with the source user. Simulation results show that the proposed strategy can increase duration of cooperation, as well as decrease the partner handoff times and probability of unsuccessful partner selection, and the same energy gain can be obtained.