• Title/Summary/Keyword: Radio Regulation

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Analysis of Spatial Distributions of Rainfall Rate for Satellite Site Diversity in Korea (위성망 이중화를 위한 국내 강우율 공간분포 분석)

  • Kwon, Yong-Ki;Park, Jung-Kyu;Yoon, Dae-Whan;Nho, Hyunjun;Park, Sungchun;Lee, Whangjae
    • The Journal of Korean Institute of Electromagnetic Engineering and Science
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    • v.26 no.11
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    • pp.985-991
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    • 2015
  • This paper proposes appropriate locations for site diversity to provide stable satellite communication service in Korea. For this purpose, we analyzed rainfall rate data measured by KMA for 5 years at 88 sites, and the variations of simultaneous occurrence of rainfall rate in pairs of sites using the correlation coefficient. This paper provided contour maps of the spatial ditstribution of rainfall rate correlation, and proposed information on the optimum sites/regions for the operation of muti-uplink satellite systems, in 4 cities which were principal in field of satellite communication in Korea.

A Study On the Correlation System Of International Radio Regulation And Domestic law (국제전파 관계조약과 국내전파법령의 연계성 체계에 관한 연구)

  • Kim, Byoung-Chan;Kim, Ki-Moon
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.8
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    • pp.1339-1348
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    • 2008
  • According to diffusion and wide utilization of Radio telecommunication, demands of radio frequency source are increasing. Thus, we have o continuously study on regulations which should be managed efficiently and usefully for father technical developing. In this paper dispute bout developing radio frequency police depends on changes of conditions and sing radio frequency source depend on a variation of environment and an advance of technique and then we consider a international agreement and an amendment of international regulations for an alternative proposal so that we suggest foundations of national radio regulations for revisions and decisions connect with radio frequency control policies and rules.

The Study on the Improvement Policy of the Pre and Post Regulation System of Radio Station (무선국 관리 사전규제 개선과 사후관리 효율화 방안에 대한 연구)

  • Kim, Ho-Yeong
    • The Journal of the Korea institute of electronic communication sciences
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    • v.17 no.5
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    • pp.745-758
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    • 2022
  • As the unlimited natural source of a country, radio waves are widely being used in the daily life toward knowledge based information society. Therefore it is necessary to provide a long term policy of radio waves management policies based on market situation to cope with rapidly changing wireless technology and effective use of radio resources. Literary survey and analysis were accomplished for the rules and regulations in the radio station approval system and post-approval policies for mobile communication service. In conclusion, this study propose an blanket radio approval policy as well as self declaration of conformity(SDoC) of radio waves technical regulation and advanced radio inspection procedure. This study has significance in providing reference for introducing deregulation policy in the radio communication imdustry.

domestic implementation of international rules regarding the orbit for satellite broadcasting (방송용 위성궤도에 대한 국제규범의 국내이행에 관한 연구)

  • Shin, Hong-Kyun
    • The Korean Journal of Air & Space Law and Policy
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    • v.21 no.1
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    • pp.191-214
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    • 2006
  • The right to the spectrum frequency and orbit is required for the broadcasting by satellite, whether the broadcaster might be given any license or authorization for the broadcasting. The reason is that the ITU Convention and Radio Regulation provide very specific and detailed rules regarding the utilization of the frequency spectrum and orbit. Outstanding issue arises as to the implementation process of the rules of international character. Domestic implementation of the Radio Regulation, in the way of letter to letter should be discouraged when the competitiveness of domestic industry vis-a-vis foreign competitor is taken into account.

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A Study for the Measurement Method of Electromagnetic Field Strength of Power Line Communications Modem (전력선통신모뎀의 전자계강도 측정방법 연구)

  • Jang Dong-Won
    • 한국정보통신설비학회:학술대회논문집
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    • 2006.08a
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    • pp.162-165
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    • 2006
  • This paper describes a measurement method for electromagnetic field strength of power-line communications(PLC) modem. First it outlines the technology used in PLC modems, and the technical regulation being offered to the technology, from the point of view of its effect on electromagnetic compatibility (EMC). The radio spectrum needs protection from other interferers, and there is a regime in place to provide this protection. Difficulties in achieving compatibility between the requirements for radio protection and the requirements for operation of the PLC modem mean that there is no consensus as yet as to how PLC modem components can be made compliant with EMC requirements globally. It is concluded that there is a measurement method according to CISPR standards which satisfy requirements in domestic regulation.

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A Plain on Operation Improvement according to the Analysis of Radio Field's Environment in Domestic Coastal (연안해역 전파환경의 분석과 운용개선 방안)

  • Yun, Jae-Jun;Kim, Byung-Ok;Choi, Jo-Cheon
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • v.9 no.1
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    • pp.1117-1124
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    • 2005
  • The radio field environment is very different according to frequency band, therefore communication condition is equation that VHF is passed by direct radiation and HF is via reflect radiation in ionosphere. Load a ship according to the enforcement regulations of the ships safety act have specificated the radio equipment that should be operating. This paper have analysed by the simulation program about radio field environment for research the communications condition, which is VHF & HF band in domestic coastal. We have Predicted to radio field environment and communications condition using the data of analysis and domestic radio regulation regard to coast navigational ship. Therefore have proposed the necessity for rationally plan on improvement the radio regulation and network cooperation of VHF radio station.

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A Novel Signaling Method using Multiple Chirps in UWB Radio (UWB 대역에서 Multiple Chirp 을 이용한 새로운 시그널링 방법)

  • Kim, Yeong-Sam;Yoon, Sang-Hun;Chong, Jong-Wha;Lee, Kyung-Kuk
    • Proceedings of the IEEK Conference
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    • 2006.06a
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    • pp.127-128
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    • 2006
  • In this paper, we propose a novel signaling method using chirp signals in UWB radio with satisfaction of FCC regulation. Chirp signals have been used in many ranging systems such as radar because of its good correlation properties. Because it is important to use broader signal bandwidth in order to get higher precision of the ranging, according to the Cramer-Rao Lower Bound, UWB radio is extremely good as the ranging systems. But, it is very difficult to apply existing chirp signals to UWB, because FCC regulates that the systems operating in UWB radio must occupy signal bandwidth more than 500MHz on the condition of stopping the frequency sweeping. So, we propose multiple chirp signals which can satisfy the regulation of FCC while maintaining chirp signal's properties. The multiple chirp signals which are composed of the sub-chirps modulated by sub-carriers can expand the signal bandwidth with the same principle of OFDM systems. The simulation results show that the BER performance of the proposed multiple chirp signals is identical to that of conventional OFDM when it is applied to data communication, and that the correlation properties of the proposed signals are almost the same with properties as those of single chirp signals whose sweeping bandwidth is the same value with the proposed one.

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Implementation of an in vitro exposure system for 28 GHz

  • Lee, Young Seung;Dzagbletey, Philip Ayiku;Chung, Jae-Young;Jeon, Sang Bong;Lee, Ae-Kyoung;Kim, Nam;Song, Seong Jong;Choi, Hyung-Do
    • ETRI Journal
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    • v.42 no.6
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    • pp.837-845
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    • 2020
  • The objective of this study was to implement an in vitro exposure system for 28 GHz to investigate the biological effects of fifth-generation (5G) communication. A signal source of 28 GHz for 5G millimeter-wave (MMW) deployment was developed, followed by a variable attenuator for antenna input power control. A power amplifier was also customized to ensure a maximum output power of 10 W for high-power 28-GHz exposure. A 3-dB uniformity over the 80 mm × 80 mm area that corresponds to four Petri dishes of three-dimensional cell cultures can be obtained using a customized choke-ring-type antenna. An infrared camera is employed for temperature regulation during exposure by adjusting the airflow cooling rate via real-time feedback to the incubator. The reported measurement results confirm that the input power control, uniformity, and temperature regulation for 28-GHz exposure were successfully accomplished, indicating the possibility of a wide application of the implemented in vitro exposure system in the fields of various MMW dose-response studies.

Analysis on Technical Standard for High Speed Power Line Communications (국내 고속전력선통신 도입을 위한 기술기준 분석)

  • Jang, Dong-Won;Cho, Pyung-Dong
    • Journal of The Institute of Information and Telecommunication Facilities Engineering
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    • v.3 no.2
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    • pp.26-32
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    • 2004
  • This paper represents analysis on domestic technical regulation of high speed power line communications(PLC). Also it gives comparison of regulations for several countries which include U.S., Europe, and Japan. Power line communications radiates harmful interference in below 30MHz. This may intervene other radio equipments. The technical regulation must protect interference and provide clean radio environment. Finally this paper gives the proposal which is drafted by field tests for introducing high speed PLC.

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