The paper proposes a non-coherent over-the-air computation (OAC) scheme to reliably compute the majority vote (MV) for guiding an unmanned aerial vehicle (UAV) through distributed sensor feedback in fading channels. The key aspects are:
The scheme modulates the amplitude of complementary sequences based on the sign of the sensor votes, without requiring channel state information at the transmitters or receiver. This provides robustness against time-varying channels and synchronization errors.
The use of complementary sequences ensures the peak-to-mean envelope power ratio of the transmitted OFDM signals is less than or equal to 3 dB, mitigating distortion from power amplifier non-linearity.
Theoretical analysis is provided for the computation error rate (CER) of the proposed scheme, showing it notably reduces the CER with longer sequence lengths in fading channels.
The proposed OAC scheme is applied to a UAV waypoint flight control scenario, where the UAV is guided by distributed sensors relying on the computed MV. Convergence analysis demonstrates the system is globally uniformly ultimately bounded in mean square.
Comprehensive simulations validate the efficacy of the proposed OAC scheme compared to prior approaches, in terms of CER, computation rate, and resource utilization.
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by Alphan Sahin... om arxiv.org 04-24-2024
https://arxiv.org/pdf/2309.15193.pdfDiepere vragen