多点协作系统中基于PMI反馈的小区间干扰弱化

摘要

Aiming at inter-cell interference in LTE communication system,a scheme of inter-cell interference mitigation based on precoding matrix index (PMI)under the condition of multi-cell coordination is proposed.The precoding technique based on codebook is used in the scheme,minimal mean-squared error (MMSE)algorithm is adopted in receiver’s design,and the round robin scheduling method is used in the inter-cell of interference.Simulation results show that each user’s average spectrum utilisation improves apparently after the PMI feedback coordination scheme is imported,and the inter-cell interference have been suppressed effectively.%针对LTE通信系统中小区间干扰，给出多点协作情况下基于预编码矩阵索引反馈（PMI ）的小区间干扰弱化方案。干扰弱化方案采用基于码本的预编码技术，接收机选用最小均方差（MMSE）设计，干扰小区间采用轮询调度算法。仿真结果表明，引入PMI反馈协调方案后，多点协作系统中每个用户的平均频谱利用率明显提高，小区间干扰得到有效的抑制。