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- Dynamic_single-frequency_networks abstract "Dynamic Single Frequency Networks (DSFN) is a transmitter macrodiversity technique for OFDM based cellular networks. DSFN is based on the idea of single frequency networks (SFN), which is a group of radio transmitters that send the same signal simultaneously over the same frequency. The term originates from the broadcasting world, where a broadcast network is a group of transmitters that send the same TV or radio program. Digital wireless communication systems based on the OFDM modulation scheme are well-suited to SFN operation, since OFDM in combination with some forward error correction scheme can eliminate intersymbol interference and fading caused by multipath propagation without the use of complex equalization.The concept of DSFN implies the SFN grouping is changed dynamically over time, from timeslot to timeslot. The aim is to achieve efficient spectrum utilization for downlink unicast or multicast communication services in centrally controlled cellular systems based on for example the OFDM modulation scheme. A centralized scheduling algorithm assigns each data packet to a certain timeslot, frequency channel and group of base station transmitters. DSFN can be considered as a combination of packet scheduling, macro-diversity and dynamic channel allocation (DCA). The scheduling algorithm can be further extended to dynamically assign other radio resource management parameters to each timeslot and transmitter, such as modulation scheme and error correction scheme, in view to optimize the efficiency.DSFN makes it possible to increase the received signal strength to a mobile terminal in between several base station transmitters in comparison to non-macrodiversity communication schemes. Thus, DSFN can improve the coverage area and lessen the outage probability. Alternatively, DSFN may allow the same outage probability with a less robust but more efficient modulation and error coding scheme, and thus improve the spectral efficiency in bit/s/Hz/base station transmitter in comparison to a non-macrodiversity communication scheme. DSFN resembles the CDMA downlink soft handover. A difference is that in the CDMA case, co-channel interference from transmissions to other users are more efficiently avoided by giving the other users other spreading codes. A special form of DSFN is Continuous Transmission DSFN, where all base station transmitters always transmit at full power, without blocking of non-utilized transmitters, and without power control. This concept is very similar to so called Virtual cellular networks (VCNs), where a virtual cell is a group of base stations sending using the same spreading code, or a group of OFDM transmitters form a Single Frequency Network. DSFN schemes can be described as a form of "virtual" power control.".
- Dynamic_single-frequency_networks wikiPageID "7276379".
- Dynamic_single-frequency_networks wikiPageLength "3140".
- Dynamic_single-frequency_networks wikiPageOutDegree "26".
- Dynamic_single-frequency_networks wikiPageRevisionID "672268493".
- Dynamic_single-frequency_networks wikiPageWikiLink Algorithm.
- Dynamic_single-frequency_networks wikiPageWikiLink Antenna_diversity.
- Dynamic_single-frequency_networks wikiPageWikiLink Broadcast_network.
- Dynamic_single-frequency_networks wikiPageWikiLink CDMA.
- Dynamic_single-frequency_networks wikiPageWikiLink Category:Radio_resource_management.
- Dynamic_single-frequency_networks wikiPageWikiLink Category:Telecommunications_techniques.
- Dynamic_single-frequency_networks wikiPageWikiLink Category:Wireless_networking.
- Dynamic_single-frequency_networks wikiPageWikiLink Channel_allocation_schemes.
- Dynamic_single-frequency_networks wikiPageWikiLink Code_division_multiple_access.
- Dynamic_single-frequency_networks wikiPageWikiLink Cooperative_diversity.
- Dynamic_single-frequency_networks wikiPageWikiLink Dynamic_channel_allocation.
- Dynamic_single-frequency_networks wikiPageWikiLink Equalization_(communications).
- Dynamic_single-frequency_networks wikiPageWikiLink Error_coding.
- Dynamic_single-frequency_networks wikiPageWikiLink Error_correction.
- Dynamic_single-frequency_networks wikiPageWikiLink Error_detection_and_correction.
- Dynamic_single-frequency_networks wikiPageWikiLink Fading.
- Dynamic_single-frequency_networks wikiPageWikiLink Intersymbol_interference.
- Dynamic_single-frequency_networks wikiPageWikiLink Macrodiversity.
- Dynamic_single-frequency_networks wikiPageWikiLink Modulation.
- Dynamic_single-frequency_networks wikiPageWikiLink Multicast.
- Dynamic_single-frequency_networks wikiPageWikiLink Multipath_propagation.
- Dynamic_single-frequency_networks wikiPageWikiLink OFDM.
- Dynamic_single-frequency_networks wikiPageWikiLink Orthogonal_frequency-division_multiplexing.
- Dynamic_single-frequency_networks wikiPageWikiLink Radio_resource_management.
- Dynamic_single-frequency_networks wikiPageWikiLink Single-frequency_network.
- Dynamic_single-frequency_networks wikiPageWikiLink Single_frequency_network.
- Dynamic_single-frequency_networks wikiPageWikiLink Soft_handover.
- Dynamic_single-frequency_networks wikiPageWikiLink Spectral_efficiency.
- Dynamic_single-frequency_networks wikiPageWikiLink Unicast.
- Dynamic_single-frequency_networks wikiPageWikiLink Virtual_cellular_network.
- Dynamic_single-frequency_networks wikiPageWikiLinkText "Dynamic single-frequency networks".
- Dynamic_single-frequency_networks wikiPageWikiLinkText "dynamic single-frequency networks".
- Dynamic_single-frequency_networks hasPhotoCollection Dynamic_single-frequency_networks.
- Dynamic_single-frequency_networks wikiPageUsesTemplate Template:Unreferenced.
- Dynamic_single-frequency_networks subject Category:Radio_resource_management.
- Dynamic_single-frequency_networks subject Category:Telecommunications_techniques.
- Dynamic_single-frequency_networks subject Category:Wireless_networking.
- Dynamic_single-frequency_networks hypernym Technique.
- Dynamic_single-frequency_networks type Article.
- Dynamic_single-frequency_networks type Software.
- Dynamic_single-frequency_networks type Article.
- Dynamic_single-frequency_networks type Protocol.
- Dynamic_single-frequency_networks type Technique.
- Dynamic_single-frequency_networks comment "Dynamic Single Frequency Networks (DSFN) is a transmitter macrodiversity technique for OFDM based cellular networks. DSFN is based on the idea of single frequency networks (SFN), which is a group of radio transmitters that send the same signal simultaneously over the same frequency. The term originates from the broadcasting world, where a broadcast network is a group of transmitters that send the same TV or radio program.".
- Dynamic_single-frequency_networks label "Dynamic single-frequency networks".
- Dynamic_single-frequency_networks sameAs m.025x_5s.
- Dynamic_single-frequency_networks sameAs Q5319018.
- Dynamic_single-frequency_networks sameAs Q5319018.
- Dynamic_single-frequency_networks wasDerivedFrom Dynamic_single-frequency_networks?oldid=672268493.
- Dynamic_single-frequency_networks isPrimaryTopicOf Dynamic_single-frequency_networks.