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- W3172469976 abstract "Over-the-air computation (AirComp) has been recognized as a low-latency solution for wireless sensor data fusion, where multiple sensors send their measurement signals to a receiver simultaneously for computation. Most existing work only considered performing AirComp over a single frequency channel. However, for a sensor network with a massive number of nodes, a single frequency channel may not be sufficient to accommodate the large number of sensors, and the AirComp performance will be very limited. So it is highly desirable to have more frequency channels for large-scale AirComp systems to benefit from multi-channel diversity. In this letter, we propose an $M$-frequency AirComp system, where each sensor selects a subset of the $M$ frequencies and broadcasts its signal over these channels under a certain power constraint. We derive the optimal sensors' transmission and receiver's signal processing methods separately, and develop an algorithm for joint design to achieve the best AirComp performance. Numerical results show that increasing one frequency channel can improve the AirComp performance by threefold compared to the single-frequency case." @default.
- W3172469976 created "2021-06-22" @default.
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- W3172469976 date "2021-06-04" @default.
- W3172469976 modified "2023-09-23" @default.
- W3172469976 title "Over-the-Air Computation via Broadband Channels" @default.
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- W3172469976 doi "https://doi.org/10.48550/arxiv.2106.02243" @default.
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