Abstract
The outage probability (OP) performance of transmit antenna selection (TAS) in decode-and-forward (DF) relaying device-to-device (D2D) networks over N-Nakagami fading channels is investigated in this paper. Exact closed-form expressions for the OP of two TAS schemes are derived. The power allocation problem is formulated to determine how the transmit power should be divided between the broadcast and relay phases to optimize performance. The OP performance under different conditions is evaluated through numerical simulation to verify the analysis. These results show that the optimal TAS scheme provides better OP performance than the suboptimal scheme, but the performance gap is reduced as the number of antennas at the source is increased. The fading coefficient, number of cascaded components, relative geometrical gain, power allocation parameter, and number of transmit antennas are shown to have a significant influence on the OP performance.
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Acknowledgments
The authors would like to thank the referees and editor for providing very helpful comments and suggestions. This project was supported by the National Natural Science Foundation of China (no. 61304222 and no. 61301139), the Natural Science Foundation of Shandong Province (no. ZR2012FQ021), and the Shandong Province Outstanding Young Scientist Award Fund (no. 2014BSE28032).
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Xu, L., Zhang, H. & Gulliver, T.A. Joint TAS and power allocation for D2D cooperative networks. Peer-to-Peer Netw. Appl. 10, 945–953 (2017). https://doi.org/10.1007/s12083-016-0454-3
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DOI: https://doi.org/10.1007/s12083-016-0454-3