{"title":"向内2.45 GHz生物医学遥控链路的体阻衰落特性","authors":"W. Scanlon, G. C. Crumley, N. Evans","doi":"10.1109/APS.1999.789158","DOIUrl":null,"url":null,"abstract":"The increasing use of short-range radio links for applications such as ward or home based physiological monitoring creates the need for a better knowledge and understanding of the indoor propagation environment. The work presented concerns a body-worn, cross-band UHF transponder used for physiological signaling within single-room environments. A modified image-based ray-tracing algorithm is used to calculate the fading characteristics for a link under the worst case condition, when the direct path between the source and chest-mounted receiver is obstructed by the body itself. The approach adopted utilizes a FDTD-generated radiation pattern of a realistic adult-male body model, incorporating the directional gains into the three-dimensional indoor ray-tracing algorithm. A description of the biomedical transponder is followed by details of the computational technique; path loss and small area fading results are then presented for a 76 m/sup 2/ area representing a hospital ward. The cumulative distribution function (CDF) results were found to be characteristically bi-modal and this novel feature is investigated in more detail.","PeriodicalId":391546,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1999-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Body-obstructed fading characteristics of an in-ward 2.45 GHz biomedical telecommand link\",\"authors\":\"W. Scanlon, G. C. Crumley, N. Evans\",\"doi\":\"10.1109/APS.1999.789158\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The increasing use of short-range radio links for applications such as ward or home based physiological monitoring creates the need for a better knowledge and understanding of the indoor propagation environment. The work presented concerns a body-worn, cross-band UHF transponder used for physiological signaling within single-room environments. A modified image-based ray-tracing algorithm is used to calculate the fading characteristics for a link under the worst case condition, when the direct path between the source and chest-mounted receiver is obstructed by the body itself. The approach adopted utilizes a FDTD-generated radiation pattern of a realistic adult-male body model, incorporating the directional gains into the three-dimensional indoor ray-tracing algorithm. A description of the biomedical transponder is followed by details of the computational technique; path loss and small area fading results are then presented for a 76 m/sup 2/ area representing a hospital ward. The cumulative distribution function (CDF) results were found to be characteristically bi-modal and this novel feature is investigated in more detail.\",\"PeriodicalId\":391546,\"journal\":{\"name\":\"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)\",\"volume\":\"5 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1999-07-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/APS.1999.789158\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Antennas and Propagation Society International Symposium. 1999 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.99CH37010)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/APS.1999.789158","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Body-obstructed fading characteristics of an in-ward 2.45 GHz biomedical telecommand link
The increasing use of short-range radio links for applications such as ward or home based physiological monitoring creates the need for a better knowledge and understanding of the indoor propagation environment. The work presented concerns a body-worn, cross-band UHF transponder used for physiological signaling within single-room environments. A modified image-based ray-tracing algorithm is used to calculate the fading characteristics for a link under the worst case condition, when the direct path between the source and chest-mounted receiver is obstructed by the body itself. The approach adopted utilizes a FDTD-generated radiation pattern of a realistic adult-male body model, incorporating the directional gains into the three-dimensional indoor ray-tracing algorithm. A description of the biomedical transponder is followed by details of the computational technique; path loss and small area fading results are then presented for a 76 m/sup 2/ area representing a hospital ward. The cumulative distribution function (CDF) results were found to be characteristically bi-modal and this novel feature is investigated in more detail.