基于大规模MIMO的高效信息与能量混合传输技术研究

In order to prolong the work time of wireless communication terminals, hybrid information and energy transfer has gained more and more attentions. However, the current efficiency of hybrid transmission is too low, which cannot satisfy the requirements of practical systems. This project will utilize the high gains of massive MIMO and cooperative transmission to improve the efficiency of hybrid transmission. Considering the non-linear energy harvesting model and the characteristics of massive MIMO: the tradeoff between information capacity and energy harvesting is first analyzed, and the hybrid precoder and power allocation scheme are designed in consideration of the interaction between information transmission and energy transfer; Further, exploiting the different effects of adjacent cells’ signals on information and energy terminals, a series of flexible cooperation transmission schemes are proposed. After obtaining some initial results, the robust hybrid (or cooperative hybrid) transmission is studied for practical systems in terms of actual channel information. Through this research, the project tries to provide a theoretical guide for hybrid information and energy transfer, and proposes some feasible schemes for practical systems.

为了延长无线通信终端的工作时间，信息与能量混合传输受到越来越多的关注。然而目前混合传输的效率较低，不能满足实际系统的需求。项目拟利用大规模MIMO和协作传输的高增益来提高混合传输的效率。考虑非线性能量收获模型及大规模MIMO的特性：首先针对信息与能量传输间的作用关系，分析信息容量与能量收获间的转换关系，设计混合传输预编码及功率分配方案；进一步将充分挖掘邻区信号对信息和能量终端的不同功效，提出一系列灵活可拓展的协作传输理论与方法；在取得阶段性研究成果的基础上，结合实际工程应用的需要，开展基于实际信道信息的鲁棒混合(或协作混合)传输研究。力求通过该项目的探索，为基于大规模MIMO的信息与能量混合传输提供理论依据，并给出有实际应用价值的可行方案。

信息与能量混合传输是延长无线通信终端工作时间的有效手段，然而目前混合传输效率或传输距离与实际需求差距较大。项目通过设计混合传输网络架构，利用大规模MIMO、协作传输、多跳等手段来提高混合传输的性能，以满足不同混合传输系统的需求。首先，设计了多层密集网络下信息与能量混合传输架构；基于此架构，利用能量传输与信息传输的差异性，设计了协作与非协作混合传输方法；给出了不同方法下的信息容量与能量收获间的转换关系。其次，探索不同信息与能量混合传输协议中，理想与非理想信道估计下的波束赋形方案；在混合传输系统侧重不同指标时，提出了不同协议与波束赋形下的最优资源分配方案。最后，利用中继及可控智能面技术增强混合传输的覆盖及距离；探索无线供能中继和终端或环路控制系统的性能，给出有实际应用价值的可行方案。