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• W3136925375 abstract "We study collaborative machine learning systems where a massive dataset is distributed across independent workers which compute their local gradient estimates based on their own datasets. Workers send their estimates through a multipath fading multiple access channel with orthogonal frequency division multiplexing to mitigate the frequency selectivity of the channel. We assume that there is no channel state information (CSI) at the workers, and the parameter server (PS) employs multiple antennas to align the received signals. To reduce the power consumption and the hardware costs, we employ complex-valued low-resolution digital-to-analog converters (DACs) and analog-to-digital converters (ADCs), at the transmitter and the receiver sides, respectively, and study the effects of practical low-cost DACs and ADCs on the learning performance. Our theoretical analysis shows that the impairments caused by low-resolution DACs and ADCs, including those of one-bit DACs and ADCs, do not prevent the convergence of the federated learning algorithm, and the multipath channel effects vanish when a sufficient number of antennas are used at the PS. We also validate our theoretical results via simulations, and demonstrate that using low-resolution, even one-bit, DACs and ADCs causes only a slight decrease in the learning accuracy." @default.
• W3136925375 created "2021-03-29" @default.
• W3136925375 creator A5048023330 @default.
• W3136925375 creator A5052990333 @default.
• W3136925375 date "2020-10-01" @default.
• W3136925375 modified "2023-09-27" @default.
• W3136925375 title "Blind Federated Learning at the Wireless Edge with Low-Resolution ADC and DAC" @default.
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• W3136925375 hasPublicationYear "2020" @default.
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