The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Perkhidmatan telemetri perubatan tanpa wayar (WMTS) ialah sistem komunikasi wayarles yang penting dalam kemudahan penjagaan kesihatan. Baru-baru ini, potensi gangguan elektromagnet oleh bunyi yang dikeluarkan oleh pengawal selia pensuisan yang dipasang dalam lampu diod pemancar cahaya (LED) telah menjadi masalah yang serius. Dalam kajian ini, kami menilai ciri-ciri bunyi elektromagnet yang dipancarkan daripada lampu LED dan kesannya terhadap WMTS. Pengawal selia pensuisan biasanya mengeluarkan bunyi impulsif jalur lebar yang lebar jalurnya mencapai 400MHz dalam beberapa keadaan disebabkan oleh operasi pensuisan, tetapi sifat impulsif ini sukar dikenal pasti dalam penerimaan WMTS kerana lebar jalur WMTS jauh lebih sempit daripada bunyi elektromagnet. Penghampiran Gaussian (GA) boleh diguna pakai untuk hingar elektromagnet terhad jalur yang ciri-cirinya tidak mempunyai variasi berulang. Sebaliknya, GA dengan faktor pembetulan impulsif (ICF) boleh diterima pakai untuk hingar elektromagnet terhad jalur yang mempunyai variasi berulang. Kami menyiasat sensitiviti penerima minimum WMTS untuk ia terjejas oleh hingar elektromagnet yang dipancarkan daripada lampu LED. Nisbah kuasa pembawa-ke-bunyi (CNR) bagi hingar Gaussian dan hingar elektromagnet yang mana GA boleh diterima pakai adalah lebih kurang 15dB, tetapi hingar elektromagnet yang mana GA dengan ICF boleh diterima pakai adalah 3 hingga 4dB lebih teruk. Selain itu, taburan spatial bunyi elektromagnet di sekeliling pemasangan lampu LED telah diukur. Akhir sekali, kami menganggarkan secara kasar jarak mengimbangi antara antena penerima WMTS dan lampu LED apabila isyarat WMTS pada tahap tertentu telah ditambah dalam tetapan klinikal menggunakan keputusan percubaan kami untuk CNR yang diperlukan.
Kai ISHIDA
National Institute of Information and Communications Technology
Ifong WU
National Institute of Information and Communications Technology
Kaoru GOTOH
National Institute of Information and Communications Technology
Yasushi MATSUMOTO
National Institute of Information and Communications Technology
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Salinan
Kai ISHIDA, Ifong WU, Kaoru GOTOH, Yasushi MATSUMOTO, "Evaluation of Electromagnetic Noise Emitted from Light-Emitting Diode (LED) Lamps and Compatibility with Wireless Medical Telemetry Service" in IEICE TRANSACTIONS on Communications,
vol. E103-B, no. 6, pp. 637-644, June 2020, doi: 10.1587/transcom.2019HMP0003.
Abstract: Wireless medical telemetry service (WMTS) is an important wireless communication system in healthcare facilities. Recently, the potential for electromagnetic interference by noise emitted by switching regulators installed in light-emitting diode (LED) lamps has been a serious problem. In this study, we evaluated the characteristics of the electromagnetic noise emitted from LED lamps and its effect on WMTS. Switching regulators generally emit wide band impulsive noise whose bandwidth reaches 400MHz in some instances owing to the switching operation, but this impulsive nature is difficult to identify in the reception of WMTS because the bandwidth of WMTS is much narrower than that of electromagnetic noise. Gaussian approximation (GA) can be adopted for band-limited electromagnetic noise whose characteristics have no repetitive variation. On the other hand, GA with the impulsive correction factor (ICF) can be adopted for band-limited electromagnetic noise that has repetitive variation. We investigate the minimum receiver sensitivity of WMTS for it to be affected by electromagnetic noise emitted from LED lamps. The required carrier-to-noise power ratio (CNR) of Gaussian noise and electromagnetic noise for which GA can be adopted was approximately 15dB, but the electromagnetic noise for which GA with the ICF can be adopted was 3 to 4dB worse. Moreover, the spatial distribution of electromagnetic noise surrounding an LED lamp installation was measured. Finally, we roughly estimated the offset distance between the receiving antenna of WMTS and LED lamps when a WMTS signal of a certain level was added in a clinical setting using our experimental result for the required CNR.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2019HMP0003/_p
Salinan
@ARTICLE{e103-b_6_637,
author={Kai ISHIDA, Ifong WU, Kaoru GOTOH, Yasushi MATSUMOTO, },
journal={IEICE TRANSACTIONS on Communications},
title={Evaluation of Electromagnetic Noise Emitted from Light-Emitting Diode (LED) Lamps and Compatibility with Wireless Medical Telemetry Service},
year={2020},
volume={E103-B},
number={6},
pages={637-644},
abstract={Wireless medical telemetry service (WMTS) is an important wireless communication system in healthcare facilities. Recently, the potential for electromagnetic interference by noise emitted by switching regulators installed in light-emitting diode (LED) lamps has been a serious problem. In this study, we evaluated the characteristics of the electromagnetic noise emitted from LED lamps and its effect on WMTS. Switching regulators generally emit wide band impulsive noise whose bandwidth reaches 400MHz in some instances owing to the switching operation, but this impulsive nature is difficult to identify in the reception of WMTS because the bandwidth of WMTS is much narrower than that of electromagnetic noise. Gaussian approximation (GA) can be adopted for band-limited electromagnetic noise whose characteristics have no repetitive variation. On the other hand, GA with the impulsive correction factor (ICF) can be adopted for band-limited electromagnetic noise that has repetitive variation. We investigate the minimum receiver sensitivity of WMTS for it to be affected by electromagnetic noise emitted from LED lamps. The required carrier-to-noise power ratio (CNR) of Gaussian noise and electromagnetic noise for which GA can be adopted was approximately 15dB, but the electromagnetic noise for which GA with the ICF can be adopted was 3 to 4dB worse. Moreover, the spatial distribution of electromagnetic noise surrounding an LED lamp installation was measured. Finally, we roughly estimated the offset distance between the receiving antenna of WMTS and LED lamps when a WMTS signal of a certain level was added in a clinical setting using our experimental result for the required CNR.},
keywords={},
doi={10.1587/transcom.2019HMP0003},
ISSN={1745-1345},
month={June},}
Salinan
TY - JOUR
TI - Evaluation of Electromagnetic Noise Emitted from Light-Emitting Diode (LED) Lamps and Compatibility with Wireless Medical Telemetry Service
T2 - IEICE TRANSACTIONS on Communications
SP - 637
EP - 644
AU - Kai ISHIDA
AU - Ifong WU
AU - Kaoru GOTOH
AU - Yasushi MATSUMOTO
PY - 2020
DO - 10.1587/transcom.2019HMP0003
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E103-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2020
AB - Wireless medical telemetry service (WMTS) is an important wireless communication system in healthcare facilities. Recently, the potential for electromagnetic interference by noise emitted by switching regulators installed in light-emitting diode (LED) lamps has been a serious problem. In this study, we evaluated the characteristics of the electromagnetic noise emitted from LED lamps and its effect on WMTS. Switching regulators generally emit wide band impulsive noise whose bandwidth reaches 400MHz in some instances owing to the switching operation, but this impulsive nature is difficult to identify in the reception of WMTS because the bandwidth of WMTS is much narrower than that of electromagnetic noise. Gaussian approximation (GA) can be adopted for band-limited electromagnetic noise whose characteristics have no repetitive variation. On the other hand, GA with the impulsive correction factor (ICF) can be adopted for band-limited electromagnetic noise that has repetitive variation. We investigate the minimum receiver sensitivity of WMTS for it to be affected by electromagnetic noise emitted from LED lamps. The required carrier-to-noise power ratio (CNR) of Gaussian noise and electromagnetic noise for which GA can be adopted was approximately 15dB, but the electromagnetic noise for which GA with the ICF can be adopted was 3 to 4dB worse. Moreover, the spatial distribution of electromagnetic noise surrounding an LED lamp installation was measured. Finally, we roughly estimated the offset distance between the receiving antenna of WMTS and LED lamps when a WMTS signal of a certain level was added in a clinical setting using our experimental result for the required CNR.
ER -