Joint TAS and power allocation for D2D cooperative networks
Joint TAS and power allocation for D2D cooperative networks
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DOI：
10.1007/s12083-016-0454-3
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发表时间：
2016-04
影响因子：
4.2
通讯作者：
Lingwei Xu;Hao Zhang-;T. Gulliver
中科院分区：
文献类型：
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作者：
Lingwei Xu;Hao Zhang-;T. Gulliver
研究了N-Nakagami衰落信道下解码转发中继D2 D网络中发射天线选择的中断概率性能。导出了两种TAS格式的OP的精确闭式表达式。功率分配的问题制定，以确定如何发送功率应划分之间的广播和中继阶段，以优化性能。通过数值仿真对不同条件下的OP性能进行了评估，验证了分析的正确性。这些结果表明，最优TAS方案提供了更好的OP性能比次优方案，但性能差距随着在源处的天线的数量的增加而减小。衰落系数，级联组件的数量，相对几何增益，功率分配参数，和发射天线的数量上的OP性能有显着的影响。
The outage probability (OP) performance of transmit antenna selection (TAS) in decode-and-forward (DF) relaying device-to-device (D2D) networks overN-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.