PROJECT TITLE :

Planning Large Single Frequency Networks for DVB-T2

ABSTRACT:

The final coverage and associated performance of a single frequency networks (SFNs) may be a joint results of the properties of all transmitters in the SFN. Because of the big range of parameters concerned in the process, finding the right configuration is quite complicated. The purpose of this paper is to search out optimal SFN network configurations for second generation digital terrestrial broadcast system (DVB-T2). Offering additional options of system parameters than its predecessor DVB-T, DVB-T2 permits large SFN networks. But, self-interference in SFNs gives rise to restrictions on the maximum intertransmitter distance and also the network size. So as to form optimum use of the spectrum, the identical frequency will be reused over totally different geographical areas-beyond the reuse distance to avoid co-channel interference. During this paper, a technique primarily based on theoretical network models is proposed. A variety of network architectures and network reference models are thought-about here for different reception modes so as to review the results of key designing factors on the maximum SFN size and minimum reuse distance. The results show that maximum bitrate, network size, and reuse distance are closely related. Moreover, it's been found that the guard interval isn't the only limiting parameter and that its impact strongly depends on the remainder of DVB-T2 mode parameters plus on the network characteristics (equivalent radiated power, effective height, and intertransmitter distance). Assuming that the carrier to noise ratio needs are within the vicinity of twenty dB and bitrates over 30 Mb/s, it's been found that the network will be as large as 360 × 360 km (delivering thirty-nine.a pair of Mb/s) or perhaps 720 × 720 km (delivering thirty seven.5 Mb/s). The reuse distance will conjointly have a complicated dependency on the DVB-T2 mode and especially the network parameters, starting from below a hundred to 300 km.