Within massive multiple-input-multiple-output (Massive MIMO) system, pilot contamination (PC) is deemed as a stumbling block in boosting the spectral efficiency (SE) regarding fifth-generation (5G) wireless communication network. To alleviate efficacy of PC, efficient sectorization-based pilot allocation (ES-PA) scheme is recommended, here users equipment (UE) are divided corresponding to their signal-to-interference-plus-noise-ratio (SINR) within two zones, i.e., cell center zone and edge zone. Smart antenna technique is used to split up edge zone further into N uniform sectors. The UE present in the cell center zone are allotted with identical pilot sequences on account of lower inter-cell-interference (ICI), whereas UE present in each sector of edge zone is allotted with mutually orthogonal pilot sequences to diminished PC. The simulation results illustrates that this recommended approach substantially attenuate strength of PC, avail lower mean squared error (MSE), greater data rate and superior SE as compared to conventional pilot allocation methods. In another effective proposed scheme II for mitigating PC, all active users are initially classified between high interference $U_H$ and low interference $U_L$ users premised on their large scale-fading. An efficient pilot allocation approach in accordance with edge weighted interference graph (EWIG) is recommended to clarify low interference users $U_L$. Simulation output reveals that recommended scheme II upgrade both uplink achievable rate $\left(R\right)$ and SINR. Additionally, the recommended approach is considerably competent of mitigating PC and maximizing system performance.

在大规模多输入多输出（Massive MIMO）系统中，导频污染（PC）被视为提高有关第五代（5G）无线通信网络的频谱效率（SE）的绊脚石。为了减轻PC的效能，建议使用高效的基于扇区划分的导频分配（ES-PA）方案，此处，用户设备（UE）根据其在两个区域内的信号干扰加噪声比（SINR）进行划分，即单元中心区域和边缘区域。智能天线技术用于将边缘区域进一步划分为N统一部门。由于较低的小区间干扰（ICI），在小区中心区域中存在的UE被分配有相同的导频序列，而在边缘区域的每个扇区中存在的UE被分配有相互正交的导频序列以减小PC。仿真结果表明，与传统的导频分配方法相比，这种推荐的方法大大削弱了PC的强度，具有较低的均方误差（MSE），更高的数据速率和出色的SE。在另一种有效的缓解PC的方案II中，最初将所有活跃用户分类为高干扰${ü}_H$ 低干扰 ${ü}_{\mathrm{大号}}$用户以其大规模衰落为前提。建议使用根据边缘加权干扰图（EWIG）的有效导频分配方法来澄清低干扰用户${ü}_{\mathrm{大号}}$。仿真输出表明，推荐方案II升级了两个上行链路可达到的速率$（\mathrm{[R}）$和SINR。此外，推荐的方法在缓解PC和最大化系统性能方面具有相当的能力。