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• W3126373016 abstract "This paper shows that deep neural network (DNN) can be used for efficient and distributed channel estimation, quantization, feedback, and downlink multiuser precoding for a frequency-division duplex massive multiple-input multiple-output system in which a base station (BS) serves multiple mobile users, but with rate-limited feedback from the users to the BS. A key observation is that the multiuser channel estimation and feedback problem can be thought of as a distributed source coding problem. In contrast to the traditional approach where the channel state information (CSI) is estimated and quantized at each user independently, this paper shows that a joint design of pilots and a new DNN architecture, which maps the received pilots directly into feedback bits at the user side then maps the feedback bits from all the users directly into the precoding matrix at the BS, can significantly improve the overall performance. This paper further proposes robust design strategies with respect to channel parameters and also a generalizable DNN architecture for varying number of users and number of feedback bits. Numerical results show that the DNN-based approach with short pilot sequences and very limited feedback overhead can already approach the performance of conventional linear precoding schemes with full CSI." @default.
• W3126373016 created "2021-02-15" @default.
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• W3126373016 date "2021-07-01" @default.
• W3126373016 modified "2023-10-11" @default.
• W3126373016 title "Deep Learning for Distributed Channel Feedback and Multiuser Precoding in FDD Massive MIMO" @default.
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• W3126373016 doi "https://doi.org/10.1109/twc.2021.3055202" @default.
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