Ultra-dense network (UDN) is one of the enabling technologies in the fifth generation (5G) wireless communications, and the application of joint transmission (JT) is extremely important to deal with severe inter-cell interferences in UDNs. However, most of the current works done in performance analysis on JT schemes in the literature were based largely on simulation results due to the difficulties in quantitatively identifying the number of desirable and interfering transmitters in a UDN setup. In this work, we are motivated to propose an analytical approach to investigate the performance of JT schemes with a unified approach based on stochastic geometry, which is in particular useful for studying different JT schemes as well as conventional transmission schemes without JT. Using the proposed approach, we can unveil the statistical characteristics (i.e., expectation, moment generation function, and variance) of desirable signal and interference powers of a given user equipment (UE), and thus the system performances, such as average signal-to-interference-plus-noise ratio (SINR) and area spectral efficiency, can be evaluated analytically. The simulation results are illustrated to verify the effectiveness of the proposed approach.

中文翻译：

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超密集网络中联合传输方案的性能分析-统一方法

超密集网络（UDN）是第五代（5G）无线通信中的使能技术之一，联合传输（JT）的应用对于处理UDN中的严重小区间干扰极为重要。但是，由于难以定量地确定UDN设置中所需的干扰发射机的数量，因此文献中有关JT方案性能分析的当前大多数工作主要基于仿真结果。在这项工作中，我们有动机提出一种分析方法，以基于随机几何的统一方法来研究JT方案的性能，这对于研究不同的JT方案以及没有JT的常规传输方案特别有用。使用建议的方法，我们可以揭示给定用户设备（UE）的理想信号和干扰功率的统计特性（即期望值，矩生成函数和方差），从而揭示系统性能，例如平均信号干扰加可以通过分析评估噪声比（SINR）和区域光谱效率。仿真结果说明了该方法的有效性。