大规模天线下能量广播方法

摘要 为了提高大规模天线能量广播系统的平均用户能量收获效用，在采用最大比传输预编码下，利用大规模天线的性质推导了单能量源场景的最优功率分配方案，利用小区间干扰提出了多能量源协作传输方法，并给出了协作能量传输的最优功率分配方案.仿真结果表明，在单能量源中，所提功率分配方案的性能好于等功率分配方案的性能，协作能量传输方案的性能优于非协作能量传输方案的性能.
In order to improve the average user utility of energy harvesting in energy broadcasting system with massive antennas, the maximum ratio transmission precoder was employed. Considering the single energy source scenario, the optimal power allocation scheme is first derived with aid of advantage of the characteristics of massive antennas. To exploit the inter-cell interference, a cooperative energy transfer scheme was proposed in multiple energy sources scenario, and the optimal power allocation for cooperative energy transfer was deduced correspondingly. Simulations indicate that the performance with the optimal power allocation is better than that with equal power allocation in single energy source scenario, and the cooperative energy transfer outperforms the non-cooperative energy transfer in multiple energy sources scenario.