关键词: 通信技术, 放大转发, 协作波束赋形, 中继选择, 能量有效性

Abstract:

A cooperative beamforming scheme based on relay selection (S-BF) is presented.To minimize the end-to-end Outage probability,a near-optimal threshold is developed to select those "appropriate" relay nodes participating in beamforming.This method guarantees that the energy is only allocated to those "appropriate" relay nodes,thus improving diversity in the cooperative beamforming.The number of selection searches is equivalent to the number of relay nodes,which will decrease the complexity of selection procedure.Monte-Carlo simulation results demonstrate that the proposed scheme achieves an essential improvement in terms of Outage performance over "all participate" cooperative beamforming (AP-BF),as well as high energy-efficiency for energy-constrained networks.

Key words: communication technology;amplify-and-forward (AF);cooperative beamforming;relay selection;energy efficiency