An efficient frequency diversity scheme for ultra-reliable communications in two-path fading channels
We consider a two-ray ground reflection scenario with unknown distance between transmitter and receiver. By utilizing two frequencies in parallel, we can mitigate possible destructive interference and ensure ultra-reliability with only very limited knowledge at the transmitter. In order to achieve t...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
IEEE
2024
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| Summary: | We consider a two-ray ground reflection scenario
with unknown distance between transmitter and receiver. By
utilizing two frequencies in parallel, we can mitigate possible
destructive interference and ensure ultra-reliability with only
very limited knowledge at the transmitter. In order to achieve
this ultra-reliability, we optimize the frequency spacing such
that the worst-case receive power is maximized. Additionally, we
provide an algorithm to calculate the optimal frequency spacing.
Besides the receive power, we also analyze the achievable rate
and outage probability. It is shown that the frequency diversity
scheme achieves a significant improvement in terms of reliability
over using a single frequency. In particular, we demonstrate the
effectiveness of the proposed approach by a numerical simulation
of an unmanned aerial vehicle (UAV) flying above flat terrain. |
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