OFDM中基于干扰协调的上行多点协作传输方法

Coordinated Multi-point Transmission for Inter-cell Interference Coordination in OFMDA System Uplinks

在LTE系统中正交频分多址(OFDMA)能在所有小区中复用完整的频段,因而能提供很高的频谱效率,但它产生了很高的小区间干扰尤其是在小区边缘。文中提出了一种基于干扰协调(ICIC)的上行多点协作传输(CoMP)方法,该方案结合基于软频率复用的干扰协调算法,不需要为CoMP单独划分额外的带宽。仿真结果表明,相比不采用干扰协调,该方案能够很好地提升用户平均吞吐量和边缘用户的吞吐量。

OFDM A provides spectral efficiency by reusing complete frequency band of all cells in LTE system.However,it results in high Inter-Cell interference especially in the cell-edge.In this paper,we present a new uplink scheme which combinate CoMP with Inter-Cell Interference Coordination（ICIC） and corresponding system performance evaluation.The proposed ICICCoMP method is compatible with the Soft Frequency Reuse（SFR）-based ICIC method and does not require the specialized division of the bandwidth for the CoMP.Compared to NO-ICIC,the simulation results show that the uplink ICIC-CoMP can bring significant gains to both the average throughput of UE and the cell-edge throughput of UE.