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arXiv 1105.6199cs.ITmath.IT
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分布式天线系统中基于和速率分析的传输方案

Transmission Schemes based on Sum Rate Analysis in Distributed Antenna Systems

Heejin Kim, Sang-Rim Lee, Kyoung-Jae Lee, Inkyu Lee

摘要:

在本文中,我们研究了单小区多用户下行分布式天线系统(DAS)的天线端口在地理上分离的小区。首先,我们推导出的路径损耗的存在下的DAS的遍历和速率的表达式。然后,我们提出了一个传输选择方案的基础上推导出的表达式,它不需要在发送端的信道状态信息。利用从用户到每个分布式天线(DA)端口的距离信息的知识,我们考虑DA端口和用户的配对优化,以最大限度地提高系统性能。该方案基于各态历经和速率表达式,在候选模式中选择最大化各态历经和速率的最佳模式。在我们提出的方案中,模式候选的数量大大减少相比,理想的模式选择。此外,我们分析了信号噪声比交叉点的不同模式使用和速率表达式。通过蒙特卡罗模拟,我们证明了我们的推导遍历和率的准确性。此外,与路径损耗建模的仿真结果证实,该方案产生的平均和速率相同的理想模式选择与显着减少的候选人。

英文摘要:

In this paper, we study single cell multi-user downlink distributed antenna systems (DAS) where antenna ports are geographically separated in a cell. First, we derive an expression of the ergodic sum rate for the DAS in the presence of pathloss. Then, we propose a transmission selection scheme based on the derived expressions which does not require channel state information at the transmitter. Utilizing the knowledge of distance information from a user to each distributed antenna (DA) port, we consider the optimization of pairings of DA ports and users to maximize the system performance. Based on the ergodic sum rate expressions, the proposed scheme chooses the best mode maximizing the ergodic sum rate among mode candidates. In our proposed scheme, the number of mode candidates are greatly reduced compared to that of ideal mode selection. In addition, we analyze the signal to noise ratio cross-over point for different modes using the sum rate expressions. Through Monte Carlo simulations, we show the accuracy of our derivations for the ergodic sum rate. Moreover, simulation results with the pathloss modeling confirm that the proposed scheme produces the average sum rate identical to the ideal mode selection with significantly reduced candidates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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