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arXiv 2103.00432cs.ITeess.SPmath.IT
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基于学习的相位压缩和具有幅值辅助信息的大规模MIMO CSI反馈的Quantization

Learning-Based Phase Compression and Quantization for Massive MIMO CSI Feedback with Magnitude-Aided Information

Yu-Chien Lin, Zhenyu Liu, Ta-Sung Lee, Zhi Ding

摘要:

大规模MIMO无线FDD系统经常面临有效获取下行链路信道状态信息(CSI)的挑战。先前的工作已经证明了通过利用它们的CSI幅度之间的上行链路/下行链路互易性在CSI编码和恢复中的潜力。然而,这样的框架单独地编码CSI相位和幅度。为了改进CSI编码,我们提出了一个基于学习的框架,基于有限的CSI反馈和幅度辅助信息。超越以前的工作,我们提出的框架与修改后的损失函数,使端到端的学习,共同优化CSI幅度和相位恢复性能。仿真结果表明,该框架优于替代方法的相位恢复在室内和室外场景中的整体CSI恢复。

英文摘要:

Massive MIMO wireless FDD systems are often confronted by the challenge to efficiently obtain downlink channel state information (CSI). Previous works have demonstrated the potential in CSI encoding and recovery by take advantage of uplink/downlink reciprocity between their CSI magnitudes. However, such a framework separately encodes CSI phase and magnitude. To improve CSI encoding, we propose a learning-based framework based on limited CSI feedback and magnitude-aided information. Moving beyond previous works, our proposed framework with a modified loss function enables end-to-end learning to jointly optimize the CSI magnitude and phase recovery performance. Simulations show that the framework outperforms alternate approaches for phase recovery over overall CSI recovery in indoor and outdoor scenarios.

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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