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CSI enhancement for multi-user superposed transmission using the second best feedback

机译:使用次佳反馈,用于多用户叠加传输的CSI增强

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In this paper we investigate and enhance the user-pairing probability in a system employing multi-user superposition transmission (MUST). In order to improve the multiuser pairing probability, we propose an additional feedback of the second best channel state information (CSI) consisting of channel quality indicator (CQI) and precoding matrix indicator (PMI). We analyze the pairing-probability and show that the additional feedback increases significantly the pairing possibilities at the scheduler. By system level simulations we confirm that the proposed enhanced feedback is improving significantly MUST performance in the context of MUST operation on the same-beam with Gray-mapped super-constellation. In addition, we suggest a simple link-to-system mapping for maximum likelihood (ML) MUST receiver, which can re-use legacy mutual-information-to-block-error-rate tables.
机译:在本文中,我们研究并提高了采用多用户叠加传输(MUST)的系统中的用户配对概率。为了提高多用户配对概率,我们提出了由信道质量指示符(CQI)和预编码矩阵指示符(PMI)组成的次佳信道状态信息(CSI)的附加反馈。我们分析了配对概率,并显示了额外的反馈显着增加了调度程序中的配对可能性。通过系统级仿真,我们确认,在具有灰色映射超星座图的同光束进行MUST操作的情况下,建议的增强反馈正在显着改善MUST性能。另外,我们建议为最大似然(ML)接收器提供一个简单的链接到系统的映射,该映射可以重用遗留的相互信息到块错误率表。

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