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Keep Pace to Learn: Movable Antennas Restore the Backpropagated Gradient Under User Mobility

Li, Xianzhong et al.
arXiv (All) · Papers
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information-theorysignal-processing
When a mobile terminal takes part in over-the-air training, its own motion rotates the gradient that travels back through it; a movable antenna that keeps pace with the terminal rotates it back---without any channel estimate. We give a speed law: under a scalar conditional-mean model of the physical
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