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Article Dans Une Revue (Article De Synthèse) IEEE Transactions on Green Communications and Networking Année : 2022

An Energy-Efficient Optical Wireless OFDMA Scheme for Medical Body-Area Networks

Md. Jahid Hasan
Mohammad Ali Khalighi
  • Fonction : Auteur
  • PersonId : 860372
Volker Jungnickel
Luis Nero Alves

Résumé

The transfer of health monitoring data from multiple patients using wireless body-area networks requires the use of robust, and energy and bandwidth efficient multipleaccess schemes. This paper considers the frequency-division multiple access for the wireless uplink to a fixed access point when using infrared signals to collect medical data from several patients inside an emergency waiting room. The conventional optical orthogonal scheme applies Hermitian symmetry to obtain real-valued signals, which implies increased computational complexity. We consider a new approach transmitting only the real part of a complex-valued signal, where no such constraint is imposed. Based on the proposed scheme, and taking into account the limited dynamic range of an infrared light-emitting diode, we study the performance of direct current biased and asymmetrically clipped schemes, and show their advantage in terms of energy efficiency and computational complexity, as compared with the conventional schemes. For instance, we show that by using asymmetric clipping, around 35 mW less transmit power is needed to achieve a bit error rate of 10 −3 in the considered scenario. We also demonstrate the robustness of the proposed scheme against multiple access interference.
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Dates et versions

hal-03937190 , version 1 (13-01-2023)

Identifiants

Citer

Md. Jahid Hasan, Mohammad Ali Khalighi, Volker Jungnickel, Luis Nero Alves, Bastien Bechadergue. An Energy-Efficient Optical Wireless OFDMA Scheme for Medical Body-Area Networks. IEEE Transactions on Green Communications and Networking, 2022, 6 (3), pp.1806 - 1818. ⟨10.1109/tgcn.2022.3161413⟩. ⟨hal-03937190⟩
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