双天线混合CSIT三用户MISO广播信道的自由度上界

2023 8th International Conference on Computer and Communication Systems (ICCCS) Pub Date : 2023-04-21 DOI:10.1109/ICCCS57501.2023.10150736

Shuo Zheng, T. Zhang, Shuai Wang, Gaojie Chen, Guoliang Li, Shancheng Zhao, Rui Wang

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引用次数: 0

摘要

利用发射机当前信道状态信息的延迟性和不完全性，即混合信道状态信息，得到了具有不少于k个发射天线的两用户多输入多输出(MIMO)广播信道和k用户多输入单输出(MISO)广播信道的和自由度(sum- dof)。然而，使用两个发射天线和混合CSIT的三用户广播信道的情况仍未被探索。本文研究了具有双发射天线和混合CSIT的三用户MISO广播信道的和dof上界。通过利用基因辅助信号和极值不等式，我们导出了和dof的上界为(1 - 0:)3/2+ 90:/4，这比期望的和dof(1 - 0:)3/2+ 20:)最大大12.5%。这表明，通过更好地约束不完善的电流CSIT对应物，可以减轻间隙。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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DoF Upper Bound on Three-User MISO Broadcast Channel with Two Antennas and Mixed CSIT

With delayed and imperfect current channel state information at the transmitter (CSIT), namely mixed CSIT, the sum degrees-of-freedom (sum-DoF) in the two-user multiple-input multiple-output (MIMO) broadcast channel and the K-user multiple-input single-output (MISO) broadcast channel with not-less-than-K transmit antennas have been obtained. However, the case of the three-user broadcast channel with two transmit antennas and mixed CSIT is still unexplored. In this paper, we investigate the sum-DoF upper bound of three-user MISO broadcast channel with two transmit antennas and mixed CSIT. By exploiting genie-aided signaling and extremal inequalities, we derive the sum-DoF upper bound as (1 - 0:)3/2+ 90:/4, which is at most 12.5% larger than the expected sum-DoF, given by (1 - 0:) 3/2 + 20:. This indicates that the gap may mitigate by better bounding the imperfect current CSIT counterpart.

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来源期刊

2023 8th International Conference on Computer and Communication Systems (ICCCS)

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