{"title":"浅海中利用电磁场的水下航行器通信","authors":"Manik Dautta, Md Imrul Hasan","doi":"10.1109/ECACE.2017.7912875","DOIUrl":null,"url":null,"abstract":"Some unavoidable shortcomings of acoustic wave based communications leads to the use of low frequency electromagnetic (EM) waves for underwater vehicle communication. Electric conductivity, causing frequency dependent attenuation, limits communication distance and data transfer rate in sea environment. An enhancement in range and bandwidth can be achieved by: 1) allowing EM signals to cross seawater-to-air boundary and achieve long-range horizontal communication using air path, followed by air to water signal transmission, if needed, and 2) exploring guided waves phenomenon at the water side of the seawater-air interface. A computational investigation to compare the EM wave propagation characteristics in seawater, in both sides of the seawater-air interface within a thin layer, and in air after crossing interface, in order to determine the optimum operating frequencies, ranges of communication, antenna orientation, and vertical offset of submerged antenna is presented in this paper. It is shown that with approximately 70 dB loss of signal strength, guided electric fields through air-water interface can be transmitted to a distance of 1 km at 10 KHz when the transmitter is 5 m below the interface.","PeriodicalId":333370,"journal":{"name":"2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2017-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"18","resultStr":"{\"title\":\"Underwater vehicle communication using electromagnetic fields in shallow seas\",\"authors\":\"Manik Dautta, Md Imrul Hasan\",\"doi\":\"10.1109/ECACE.2017.7912875\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Some unavoidable shortcomings of acoustic wave based communications leads to the use of low frequency electromagnetic (EM) waves for underwater vehicle communication. Electric conductivity, causing frequency dependent attenuation, limits communication distance and data transfer rate in sea environment. An enhancement in range and bandwidth can be achieved by: 1) allowing EM signals to cross seawater-to-air boundary and achieve long-range horizontal communication using air path, followed by air to water signal transmission, if needed, and 2) exploring guided waves phenomenon at the water side of the seawater-air interface. A computational investigation to compare the EM wave propagation characteristics in seawater, in both sides of the seawater-air interface within a thin layer, and in air after crossing interface, in order to determine the optimum operating frequencies, ranges of communication, antenna orientation, and vertical offset of submerged antenna is presented in this paper. It is shown that with approximately 70 dB loss of signal strength, guided electric fields through air-water interface can be transmitted to a distance of 1 km at 10 KHz when the transmitter is 5 m below the interface.\",\"PeriodicalId\":333370,\"journal\":{\"name\":\"2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2017-02-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"18\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ECACE.2017.7912875\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 International Conference on Electrical, Computer and Communication Engineering (ECCE)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ECACE.2017.7912875","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Underwater vehicle communication using electromagnetic fields in shallow seas
Some unavoidable shortcomings of acoustic wave based communications leads to the use of low frequency electromagnetic (EM) waves for underwater vehicle communication. Electric conductivity, causing frequency dependent attenuation, limits communication distance and data transfer rate in sea environment. An enhancement in range and bandwidth can be achieved by: 1) allowing EM signals to cross seawater-to-air boundary and achieve long-range horizontal communication using air path, followed by air to water signal transmission, if needed, and 2) exploring guided waves phenomenon at the water side of the seawater-air interface. A computational investigation to compare the EM wave propagation characteristics in seawater, in both sides of the seawater-air interface within a thin layer, and in air after crossing interface, in order to determine the optimum operating frequencies, ranges of communication, antenna orientation, and vertical offset of submerged antenna is presented in this paper. It is shown that with approximately 70 dB loss of signal strength, guided electric fields through air-water interface can be transmitted to a distance of 1 km at 10 KHz when the transmitter is 5 m below the interface.