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On local/regional single frequency networks
KTH, Superseded Departments, Signals, Sensors and Systems.
1995 (English)Conference paper, Published paper (Refereed)
Abstract [en]

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.

Place, publisher, year, edition, pages
1995.
National Category
Computer and Information Science
Research subject
SRA - ICT
Identifiers
URN: urn:nbn:se:kth:diva-28570OAI: oai:DiVA.org:kth-28570DiVA: diva2:388005
Conference
Nordic Radio Symposium
Note
QC 20110117Available from: 2011-01-16 Created: 2011-01-16 Last updated: 2011-01-17Bibliographically approved

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