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- W631540760 abstract "OFDM is a new modulation scheme which can handle severe multipath propagation environments. The OFDM receiver allows all transmitters in a radio broadcasting network to transmit the same radio program in the same frequency block simultaneously, i.e. simulcasting. Such a Single Frequency Network (SFN) provides good coverage and frequency economy in national applications. However, the efficiency in local SFNs has been questioned. The coverage properties of a single frequency broadcasting network are strongly dependent on the transmitter density which determines the degree of diversity when receiving signals from several transmitters. Results indicate that required coverage properties can be achieved in local networks with only three frequency blocks provided that seven transmitters are used to cover each regional service area. Further, we show that there exist an optimal antenna height for a given coverage area and guard interval. The results also indicate that the guard interval has to be chosen with some care dependent on the size of the service area." @default.
- W631540760 created "2016-06-24" @default.
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- W631540760 date "1995-01-01" @default.
- W631540760 modified "2023-09-27" @default.
- W631540760 title "On local/regional single frequency networks" @default.
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