Measurement and Modeling of DTTV–SFN Propagation in Thailand

Abstract

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.