关键词: 绿色通信, 能量收集, EH-MIMO, 天线选择, 信道容量

Abstract: For the effective energy utilization and data transmission, ergodic selection algorithms of data and energy antennas for the wireless cooperative EH-MIMO systems, where part of antennas at the node are used for energy harvesting and the other antennas are used for data transmission, have been proposed. The selection result is theergodic solution to the channel capacity maximization problem of the proposed cooperative EH-MIMO models, and thus is optimal in capacity performance. In order to reduce complexity of algorithms, two suboptimal algorithms of the data and energy antenna selection, named by antenna increasing selection algorithm and antenna reduction selection algorithm, have been further proposed and also compared with the optimal algorithms in the computational complexity. The simulation results show that the suboptimal algorithms approach the optimal algorithms in terms of channel capacity and energy efficiency of system, while the suboptimal algorithms have much lower complexity.

Key words: green communication, energy harvesting, EH-MIMO, antenna selection, channel capacity