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Author: search.filters.author.Promwong, SathapornSubject: search.filters.subject.SFN

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    Measurement and Modeling of DTTV–SFN Propagation in Thailand
    (2020-12-01)
    Promwong, Sathaporn
    ;
    Tiengthong, Thanadol
    ;
    Ruckveratham, Bundit
    Digital terrestrial television (DTTV) with a single frequency network (SFN) in Thailand is based on digital video broadcasting-terrestrial second generation (DVB-T2) standard. The signal quality of DTTV–SFN is very important. DVB-T2 is improved from traditional terrestrial television broadcasting technology in term of modulation which is coded orthogonal frequency-division multiplex. Therefore, the performance of DTTV should be study. SFN is a key factor in DVB-T2 technology due to the benefits of SFN. In order to evaluation the DVB-T2 performance, this research had investigated delay characteristics , path loss, and broadcasting reception threshold of DVB-T2 signal. The measurement was done in an overlap area of DTTV–SFN in Thailand. The measurement model was set up to measure the delay time, received signal power, and network quality parameters between guard interval time of three transmitted stations. The results present a comparison of delay characteristics between each received positions and a comparison of path loss between free space case and measurements. An acceptable result of spectrum variation, CNR, MER, and noise margin are presented which have the average value equal to 3.03 dB, 22.62 dB, 7.83 dB, and − 5.54 dB, respectively. The contribution of this research provide a measurement and modeling of DTTV–SFN in Thialand which the results are presented a useful information for optimization and modeling of DTTV–SFN system in Thailand.
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    Evaluation of DTTV Transmission for SFN with Minimum Threshold in Thailand
    (2020-12-01)
    Promwong, Sathaporn
    ;
    Tiengthong, Thanadol
    ;
    Ruckveratham, Bundit
    The digital terrestrial television (DTTV) transmission based on digital video broadcasting-terrestrial second generation (DVB-T2) for a single frequency network (SFN) shall be studied. The DTTV signal performance is very important. Therefore, the performance of DTTV should be studied. SFN is a key factor in DVB-T2 technology due to the benefits of SFN. In order to evaluate the DVB-T2 performance, this research had investigates broadcasting reception threshold of DVB-T2 signal. The experiment was done in a laboratory of Mass Communication Organization of Thailand company, Thailand, and field experiment was done in urban area of Sing Buri, Thailand. The measurement model was set up to measure the the DTTV performance parameter with respected to guard interval delay time of two SFN transmitters. The acceptable result of minimum power, received signal, CNR, MER, and transmission loss are presented. The reliability of the result was validated by using polynomial. The measurement results provided a useful information for optimization and modeling of DTTV broadcasting for SFN system with DVB-T2 in Thailand.
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    Modulation error ratio gain of single frequency network in DVB-T2
    (2019-04-15)
    Promwong, Sathaporn
    ;
    Tiengthong, Thanadol
    ;
    Ruckveratham, Bundit
    DVB-T2 broadcasting with a single frequency network allows an efficient management of frequency utilization and extend the coverage area, which will enable more people to view a broadcast. The SFN mode also increases the concentration of the signal in overlap areas. However, some different of overlap areas in actual use of SFN networks may have some degradation of the received signal due to the effect of the SFN. In this research, we analyze SFN broadcasting in SISO mode. This paper represents the effects of delays on the SFN signal over different delay times within the guard interval by analyzing the minimum reception threshold. The analysis of received signal power, MER, bBER, LBER, and noise margin are studied using an actual digital television transmitter for the experiment. The results show that the minimum thresholds for a delay time at 0 microseconds will require higher receive signal power than other delay times within the GI. The results of this experiment are useful in designing the SFN network and make it possible to determine the appropriate C/N threshold for the design of the digital terrestrial television network.