Output-Threshold Multiple-Relay-Selection Scheme for Cooperative Wireless Networks
Gayan Amarasuriya, Masoud Ardakani, Chintha Tellambura · IEEE Transactions on Vehicular Technology · 2010
An output-threshold multiple-relay-selection (OT-MRS) scheme for dual-hop multibranch cooperative wireless networks is proposed. In this scheme, the firstLc(nonordered) relays are sequentially selected out ofLrelays such that the SNR of the maximal ratio combinedLcrelayed paths and the direct path exceeds a preset threshold. Analytical results for the performance bounds are derived. The numerical results verify the analyses and show that OT-MRS outperforms optimal single-relay selection and generalized-selection-combining-based multiple relay-selection for low to moderately high SNRs. The proposed scheme provides more flexibility in utilizing bandwidth and spatial diversity in cooperative wireless networks.