Cooperative Multi-Relay Assisted Multicast Beamforming in Wirelessly Powered Communications
文献类型：会议论文
| 作者 | Jiachen Li; Yue Mi; Shimin Gong; Jing Xu; Xiaoxia Huang; Yanyan Shen |
| 出版日期 | 2017 |
| 会议日期 | 2017 |
| 会议地点 | 挪威 |
| 英文摘要 | This paper studied downlink multicasting in a wirelessly powered communication network, where multiple energyconstrained relay nodes collaboratively assist the transmissions from a multi-antenna hybrid access point (HAP) to multiple receivers in the downlink. Each relay is equipped with a single antenna and capable of energy harvesting (EH) from the HAP’s RF signals in a power splitting protocol. Due to the confliction between EH and information transmission at the relays, they need to optimally control the power splitting ratio, according to the relays’ channel conditions and energy status, with the aim of improving the signal-to-noise ratio (SNR) at all receivers. We propose a SNR maximization problem by jointly optimizing the HAP’s signal beamforming and the relays’ EH parameters. Though it is non-convex and difficult to solve optimally, we design an iterative algorithm by efficiently solving semi-definite programs successively. Simulation results show the efficacy of the proposed algorithm and validate our findings that relays will choose not to broadcast signal when its channel condition is poor. |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/12682]  |
| 专题 | 深圳先进技术研究院_数字所 |
| 作者单位 | 2017 |
| 推荐引用方式 GB/T 7714 | Jiachen Li,Yue Mi,Shimin Gong,et al. Cooperative Multi-Relay Assisted Multicast Beamforming in Wirelessly Powered Communications[C]. 见:. 挪威. 2017. |
入库方式： OAI收割
来源：深圳先进技术研究院
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