高能效大规模天线阵列架构下的符号级预编码关键技术研究

大规模天线阵列被广泛认为是未来蜂窝移动通信系统中必不可少的关键技术之一，能显著改善小规模天线阵列系统的通信性能。理想大规模天线阵列硬件开销大、能耗高，在极大提高运营商成本的同时难以满足未来绿色通信的要求。因此，大规模天线阵列技术在蜂窝移动通信系统中应用的瓶颈主要在于能耗。高能效架构是缓解大规模天线阵列硬件成本和能耗问题的有效方案，然而高能效架构引入的信号失真和非线性等问题会使通信系统的性能严重恶化。本课题以未来移动通信系统的技术需求为背景，以基于有益干扰的符号级预编码技术为核心，以实现高能效和高性能的大规模天线阵列通信为目标，设计基于符号级预编码的多用户传输方案，改善高能效大规模天线阵列系统的通信性能和能效，进一步促进其在实际无线通信系统中的部署。本研究对大规模天线阵列的高能效架构与传输方案设计具有重要的研究意义和应用价值。

Large-scale antenna array has been widely acknowledged as one of the key enabling techniques for future wireless cellular communication systems, which is able to improve the performance of small-scale MIMO systems significantly. However, the practical implementation towards ideal fully-digital architectures results in prohibitive hardware expenditures and power consumption, which increases the operational cost for wireless service providers and meanwhile does not meet the future 'Green Communications' concept. Therefore, the main bottleneck for the application of large-scale antenna arrays in cellular mobile communication systems is the power consumption. Power-efficient architectures are effective solutions to the above issue, but the incurred hardware impairments such as signal distortion and nonlinearity will severely deteriorate the system performance. Therefore, following the technical requirements of future mobile communication systems and targeting at the realistic implementation of large-scale antenna arrays, this project aims to design advanced multi-user transmission techniques based on interference exploitation symbol-level precoding to improve the performance of power-efficient architectures, further motivating the practical deployment of power-efficient large-scale antenna arrays. The study of this project is of great academic significance and industrial impact for power-efficient architectures and transmission design of large-scale antenna arrays.