  In this study, we propose a non-coherent over-the-air computation scheme to
calculate the majority vote (MV) reliably in fading channels. The proposed
approach relies on modulating the amplitude of the elements of complementary
sequences based on the sign of the parameters to be aggregated. Since it does
not use channel state information at the nodes, it is compatible with
time-varying channels. To demonstrate the efficacy of our method, we employ it
in a scenario where an unmanned aerial vehicle is guided by distributed
sensors, relying on the MV computed using our proposed scheme. We show that the
proposed scheme notably reduces the computation error rate with a longer
sequence length in fading channels while maintaining the peak-to-mean-envelope
power ratio of the transmitted orthogonal frequency division multiplexing
signals to be less than or equal to 3 dB.
