基于带内回程的全双工大规模MIMO异构网覆盖分析

Coverage Analysis for Full-Duplex Massive MIMO Heterogeneous Network Based on In-band Backhaul

在大规模多输入多输出(MIMO)系统中,带内全双工无线回程方案能够有效复用无线电接入频谱,大幅提高网络性能。为此,基于该方案构建大规模MIMO异构蜂窝网络模型,并假设网络元素分别服从独立齐次泊松点过程,利用随机几何理论分别研究宏蜂窝下行和小蜂窝上行链路信号干扰噪声比(SINR)的覆盖概率,分析不同参数对覆盖性能的影响。仿真结果表明,带内全双工无线回程方案能够有效提高系统频谱效率,但不能改善宏蜂窝和小蜂窝网络的SINR覆盖概率。

In massive Multiple-Input Multiple-Output（ MIMO） system,In-Band（ IB） Full-Duplex（ FD） wireless backhaul scheme can reuse the radio access spectrum and greatly improve the network performance. With this consideration,this paper proposes a massive MIMO heterogeneous cellular network model based on IB FD wireless backhaul. By assuming that the network elements are subject to independent Homogeneous Possion Point Process（ HPPP）and using the stochastic geometry theory,it researches the Signal-to-Interference-Noise Ratio（ SINR） coverage probabilities of the macro cell downlink and small cell uplink transmission respectively,and analyzes the impacts of different parameters on the coverage performance. Simulation results showthat the IB FD wireless backhaul scheme can effectively improve the spectral efficiency of the system,but it cannot improve the SINR coverage probability of the macro cell and small cell networks.