Analysis of methods for regional SFN broadcasting serviceability assurance

SFN serviceability depends on synchronization availability between transmitters. In this paper we performed analysis of SFN network algorithms, and it shows the probability of loss synchronization between transmitters rises strongly without time delay calibration between network signal and transmitter modulator, that leads to SFN outages. Regional SFN serviceability under transmitter synchronization depends on gain margin defining by BER threshold. Nowadays guard band inconsistency is the main issue limiting effective application of SFN in Russia due to the same setting of this parameter for all regions by Federal Center of Multiplexing Formation. SFN serviceability should be provided by correction of emission time delay in transmitters. Therefore, all echo signals should be set inside of guard band due to emission time delay correction over broadcasting area. This work is concerned with possible options for regional SNF broadcasting serviceability. We analyzed advantages and disadvantages of Sweden program «Plan PROGIRA®», which is based on additional emission time delay correction in transmitters.