Tooprakai, Sirapop

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Tooprakai, Sirapop
Alternative Name
Tooprakai, Siraphop
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Email
sirapop.to@kmitl.ac.th

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    Item type:Publication,
    Estimation of Protection Distance between Digital TV Signals in Adjacent Channel on Terrestrial Television
    (2025-01-01)
    Chomsuk, Kinupong
    ;
    Tooprakai, Siraphop
    The Office of the National Broadcasting and Telecommunication Commission (NBTC) of Thailand initiated the transition to digital broadcasting. The implementation process requires a broadcasting license and digital transmission testing, which was carried out on channel 29 and channel 30 - adjacent channels. Due to the 20 MHz spacing between these signals, adjacent channel interference is inevitable. This study experimentally evaluates the degradation caused by interference between digital television signals operating on adjacent channels in terrestrial television broadcasting.A novel aspect of this research is the use of field strength measurements to assess the impact of adjacent channel interference on digital TV signals within urban areas. The results demonstrate that most measured protection ratios (PR) align with the ITU-R recommended value of -11 dB. This confirms that the power ratio is affected by spectrum overlap rather than the distance from the trasmitter station.
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    Item type:Publication,
    Estimation on protection distance between analog TV and digital TV in adjacent channel at terrestrial television
    (2017-10-19)
    Chomsuk, Kinupong
    ;
    Tooprakai, Siraphop
    Office of the National Broadcasting and Telecommunication Commission (NBTC), the Thai governmental organization decided to launch digital broadcasting. The implementation has to carry by the broadcasting license; the digital transmission testing has to carry on broadcasting on channel 30 while the analog television has to broadcast on channel 29. The adjacent channel interference must occur between analog television signal and digital television signal because of 20 MHz spacing between both signals. This paper proposes the experimental study of testing in order to measure and determine the degradation caused by the analog PAL television signal interferences on the digital television signal.