An efficient frequency diversity scheme for ultra-reliable communications in two-path fading channels

Journal article

Abstract:: 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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Language:: English
Keywords:: ultra-reliable communications

worst-case design

frequency diversity

two-ray ground reflection

outage probability
Pubs id:: 2007653
Local pid:: pubs:2007653
Deposit date:: 2024-06-11

Copyright holder:: KICS
Rights statement:: © 2024 KICS. This is an Open Access article distributed under the terms of Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided that the original work is properly cited.
Notes:: This is the accepted manuscript version of the article. The final version will be available online from a forthcoming edition of the Journal of Communications and Networks.

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