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A Novel Highly-Efficient Amplification Scheme for Wireless Communications in a CathLab Environment
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Resumo(s)
Wireless communication systems are being considered for medical applications to facilitate the doctors' operation and the quality of the medical procedures. A demonstrative example of this is the catheterization laboratory (CathLab), where it is desirable to replace the existent wired connections by wireless alternatives. However, there are some challenging requirements that need to be fulfilled by the wireless link, especially for intra-vascular ultra-sound (IVUS) systems, since the images acquired by the catheter should be transmitted with very high data rate and low latency, together with the highest possible amplification efficiency, to increase the battery life. The communication requirements can be achieved with latest the Wi-Fi standard IEEE 802.11ax (Wi-Fi 6). However, since Wi-Fi is based on orthogonal frequency division multiplexing (OFDM) waveforms, the transmitted signals present high envelope fluctuations, leading to amplification difficulties due to the nonlinear distortion effects and low energy efficiency. In this paper, we present an innovative amplification scheme named quantized digital amplification (QDA). It is shown that the QDA allows a quasi-linear amplification of IEEE 802.11ax signals while maintaining a very high energy efficiency. To demonstrate this, a QDA prototype and a set of performance results, regarding both the linearity of the transmitted signals and the energy efficiency, are presented.
Descrição
Funding Information: This work was supported by Koala Tech, under the support of P2020 - Projetos Individuais - Internacionalização, (LISBOA-02-0752-FEDER-038713), by Fundação para a Ciência e Tecnologia and Instituto de Telecomunicações under projects UIDB/50008/2020 and PES3N (POCI-01-0145-FEDER-030629) and by POSITION II, which received funding from the Electronic Component Systems for European Leadership Joint Undertaking (ECSEL-JU) under grant agreement 783132-Position-II-2017-IA. Funding Information: This work was supported in part by Koala Tech through the support of P2020—Projetos Individuais—Internacionalização under Grant LISBOA-02-0752-FEDER-038713, in part by the Fundação para a Ciência e Tecnologia, in part by the Instituto de Telecomunicações under Project UIDB/50008/2020 and the Project PES3N under Grant POCI-01-0145-FEDER-030629, and in part by the POSITION II through the Electronic Component Systems for European Leadership Joint Undertaking (ECSEL-JU) under Grant 783132-Position-II-2017-IA. Publisher Copyright: © 2013 IEEE.
Palavras-chave
CathLab orthogonal frequency division multiplexing peak-to-average power ratio power amplification Wi-Fi General Computer Science General Materials Science General Engineering SDG 7 - Affordable and Clean Energy