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SINR study in Single Frequency Network
environment
Jike Li
Beijing University of Posts and Telecommunications (100876)
Abstract
We implement SFN (Single Frequency Network) in an OFDM platform and SINR from different links
carrying the same signal can be combined. Since we treat each OFDM sub channel as narrow band flat
fading channel, our combination of rays from different base station is make sense.
We simulate both in door and out door cases with different cyclic prefix lengths, and give out the
simulation results. In our results, the out door case have a larger coverage compared with the indoor
case, given the similar SINR.
Keywords :Single Frequency Networks; Coverage; SINR distribution; Penetration loss
1. Introduction
Digital broadcasting is an efficient way of distributing large amount of information such as high
quality audio and video to many subscribers. Some broadcasting systems are able to server an
arbitrary large area with the same program using single frequency network. A single frequency
network (SFN) is composed of a group of cells covering a geographic area, transmitting identical
waveforms in the same time and on the same frequency. Both the European DAB (Digital Audio
Broadcasting) system and the DVB (Digital Video Broadcasting) system use the modulation
scheme OFDM (Orthogonal Frequency Division Multiplexed) to facilitate SFN. In OFDM system,
the band is divided into many narrow sub channels which are transmitted in parallel. Each sub
channel is treated as a narrow band signal, that is, the signal in such sub channels experience a flat
fading. And the symbol is sufficiently long to overcome some of the problems with delay spread
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