| 标 题： |
5G New Radio Non-terrestrial Networks Multiuser Precoding
5G新无线电非地面网络多用户预编码 |
| 作 者： |
Xavier Artiga
Miguel Angel Vazquez |
| 关键词： |
MIMO [MIMO]
Precoding [预编码]
3GPP [3GPP]
Precoding matrix indicator [预编码矩阵指示器]
NTN [NTN]
Multi-beam satellite [多光束卫星] |
| 出版年： |
2022 |
| 文集名： |
11th Advanced Satellite Multimedia Systems Conference (ASMS 2022), 17th Signal Processing for Space Communications Workshop (SPSC 2022)
第11届高级卫星多媒体系统会议（ASMS 2022），第17届空间通信信号处理研讨会（SPSC 2022） |
| 会议名： |
11th Advanced Satellite Multimedia Systems Conference (ASMS 2022), 17th Signal Processing for Space Communications Workshop (SPSC 2022)
第11届高级卫星多媒体系统会议（ASMS 2022），第17届空间通信信号处理研讨会（SPSC 2022） |
| 届 次： |
11th |
| 摘 要： |
This works reviews 3rd generation partnership project (3GPP) New Radio procedures for closed-loop multiuser precoding, evaluates their application to non-terrestrial (NTN) scenarios, and proposes adaptions to proficiently exploit their interference mitigation performance. Based on a qualitative evaluation, we demonstrate that Type II codebooks are not suitable for most of the antenna configurations we may find in multibeam satellite systems, whereas Type II port selection codebooks need to be modified to report on the L strongest beams. Numerical simulations utilizing consolidated 3GPP scenarios show that the minimum L varies depending on the terminal link quality. In addition, we show that current 3GPP quantization of the coefficients to be reported limits the system performance, and an extra bit would be at least required for both magnitude and phase in order to attain significant gains. The proposed modifications can be easily included in the standard since they do not represent a significant change with respect to the current specification.
本文综述了第三代合作伙伴计划（3GPP）新无线电技术中关于闭环多用户预编码的流程，评估了其在非地面（NTN）场景中的应用，并提出相应的改进方案以更有效地利用其干扰抑制性能。通过定性分析，我们表明：II型码本不适用于大多数多波束卫星系统中可能遇到的天线配置；而II型端口选择码本则需进行修改，以报告L最强的波束。基于整合的3GPP场景进行的数值仿真显示，最小L值取决于终端链路质量。此外，我们指出当前3GPP对所报告系数的量化方式限制了系统性能，若要实现显著增益，则至少需要为幅度和相位各增加一位比特。所提出的修改可轻松纳入标准，因为这些改动与现有规范相比并未带来重大变化。 |
| 中文内容为网络AI翻译，专业术语未必准确，仅供参考。 |
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