LTE-A中协同多点传输的联合处理预编码方法

Joint Processing Precoding for Coordinated Multi-Point Transmission in LTE-A

协同多点传输(CoMP)是围绕LTE-A的目标而提出的通过基站内不同远程射频单元(RRU)协作、基站和其所属中继协作和基站间协作等多种多点协作方式,减小小区边缘干扰、提高小区边缘频谱效率、增加有效覆盖的技术措施。CoMP中的联合处理技术(JP)对系统性能的提升最大,JP对性能提升的主要途径是基于信道信息的预编码技术。在不同的CoMP场景下,各种预编码方式各有优劣。越来越多的研究更集中于从压缩反馈量和优化码本设计两个角度来实现预编码的优化。

Coordinated Multi-Point （CoMP） transmission/reception is an efficient way to reduce inter-cell interference, improve the spectrum efficiency and coverage in LTE-A system, through Remote Radio Unit （RRU）, base station or relay cooperation. Compared with other CoMP technologies, Joint Processing （JP）, which carries out precoding based on channel information, can achieve the biggest system performance gain. Different precoding methods are suitable for different CoMP scenarios. Recently more and more research concentrates on feedback compression and coded book optimization in CoMP precoding.