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为了在实际应用中降低分布式天线系统(distributed antenna system,DAS)的功耗,实现绿色移动通信的目标,该文研究了在同时包括传输功耗和电路功耗的实际功耗模型下,发送端仅知大尺度信道状态信息时的下行DAS系统的总功耗优化问题。采取了联合发送天线选择和功率分配方案,然后将原问题分解为一系列可用有效算法求解的子问题,最后在此基础上提出了一种低复杂度的联合排序选择和功率分配算法。仿真结果表明:所提算法在满足用户遍历容量需求时,可以使系统总功耗得到显著降低。该方案可以用较低的系统开销,实现DAS的实用性能提升。
In order to reduce the power consumption of distributed antenna system (DAS) and achieve the goal of green mobile communication in practical applications, this paper studies the real power consumption model that includes both transmit power and circuit power consumption The Total Power Optimization Problem of Downlink DAS System When Only Means of Large-Scale Channel Status Information. In this paper, a joint transmission antenna selection and power allocation scheme is adopted, and then the original problem is decomposed into a series of sub-problems that can be solved by an efficient algorithm. Finally, a low-complexity joint scheduling and power allocation algorithm is proposed. Simulation results show that the proposed algorithm can significantly reduce the total system power consumption when meeting the demand of user traversal capacity. The solution can be used to lower the system overhead, DAS practical performance improvement.