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http://dx.doi.org/10.7840/KICS.2011.36B.11.1357

Analysis on Interference Impact of WiFi on DTV  

Cheng, Yan-Ming (공주대학교 정보통신공학과/중국북화대학교 전기및정보공학대학 전자정보공학부)
Cho, In-Kyoung (공주대학교 정보통신공학과/한국전자통신연구원 무선시스템연구부 이동패킷전송연구팀)
Lee, Il-Kyoo (공주대학교 전기전자제어공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.11B, 2011 , pp. 1357-1362 More about this Journal
Abstract
TV White Spaces (TVWS) are freed up after transition from analog television to Digital Television (DTV). Some wireless communications are allowable to operate in TVWSs, such unlicensed Wireless Fidelity (WiFi). Because TVWSs are located in the VHF and UHF bands, TVWSs can provide significantly better coverage and wall penetration inside buildings and other structures than the 2.4 GHz and 5 GHz WiFi frequencies currently in use. Therefore, this paper assumes that WiFi will be deployed in TVWSs. However, the interference impact of WiFi on DTV has to be taken into account. The interference probability in DTV receiver was evaluated by using Spectrum Engineering Advanced Monte-Carlo Analysis Tool (SEAMCAT). As a result, when 20 WiFi UEs are simultaneously operating at the maximum transmit power of 23 dBm and the guard band is 22 MHz, the protection distance should be at least 6 km to meet the interference probability of 5% in DTV receiver.
Keywords
TVWS; DTV; WiFi; interference probability; guard band; protection distance;
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