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Performance analysis for uplink massive MIMO systems with a large and random number of UEs

服务大数目随机用户的上行大规模天线系统的性能分析

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Abstract

In this paper, we analyze the ergodic achievable rate of an uplink massive multi-user multipleinput multiple-output (MIMO) system with a large and Poisson distributed number of users. In the considered scenario, multiple user equipments (UEs) transmit their information to a base station equipped with a very large number of antennas. New asymptotic expressions for the ergodic achievable rate for large and deterministic number of users are derived for both maximum ratio combining (MRC) detector and zero-forcing (ZF) detector, as well as the ergodic achievable rate for large and random number of users. Simulation results assess the accuracy of these analytical expressions. It is shown that compared with the MRC detector, ZF detector can achieve much higher spectrum efficiency. Also, the results provide a meaningful fact that with different settings the randomness of the number of users will result in different extents of impact on the performance of massive MIMO.

创新点

在本文中,我们分析了服务大数目随机用户的上行大规模天线系统的遍历可达速率。在该场景中,多个用户发送信息至一个装备大量天线的基站。对于固定数目和随机数目的用户,我们分别给出了采用最大比合并接收机和迫零接收机时的遍历可达速率。仿真结果说明了我们理论推导的准确性。与最大比合并接收机相比,迫零接收机能给系统带来更高的频谱效率。此外,随机用户数目的不同设置也会给大规模天线系统的性能带来不同的影响。

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Correspondence to Chengwen Xing.

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Yang, A., Xing, C., Fei, Z. et al. Performance analysis for uplink massive MIMO systems with a large and random number of UEs. Sci. China Inf. Sci. 59, 1–9 (2016). https://doi.org/10.1007/s11432-015-5435-2

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Keywords

  • massive MIMO
  • large numbers of UEs
  • maximum ratio combining detector
  • zero-forcing detector
  • ergodic achievable rates

Keywords

  • 022312

关键词

  • 大规模天线
  • 大数目用户
  • 最大比合并接收机
  • 迫零接收机
  • 遍历可达速率