摘要
针对D2D通信与蜂窝通信复用频谱资源时会产生同频干扰的问题,提出一种基于保证蜂窝用户通信质量的功率分配算法。在保证蜂窝用户平均SINR和最小SINR双重约束的基础上,建立以最大化D2D链路平均吞吐量为目标的凸优化问题,并利用拉格朗日函数推导出最优功率分配的闭式解。仿真结果表明:该算法不仅可以保证蜂窝用户通信质量,而且也能最大限度地提高D2D链路以及整个系统的总吞吐量。
The reuse of spectrum resource between D2 D communication and cellular system leads to the problem of same-frequency interference. For this issue,we proposed a power allocation algorithm which is based on guaranteeing the communication quality of cellular users.By guaranteeing the double constraints of average SINR and least SINR for cellular users,we presented the convex optimisation problem aimed at maximising the average throughput of D2 D link,and used Lagrange function to deduce the closed solution of optimal power allocation. Simulation results shown that the proposed algorithm could guarantee the communication quality of cellular users,and could raise the total throughput of D2 D link and the overall system as well to maximum extent.
出处
《计算机应用与软件》
CSCD
2015年第12期83-87,共5页
Computer Applications and Software
基金
四川省教育厅科研项目(13ZA0135)
关键词
D2D通信
功率分配
拉格朗日对偶
信干噪比
凸优化
Device-to-device（D2D） communication
Power allocation
Lagrange dual
Signal to interference plus noise ratio（SINR）
Convex optimisation
