Capacity analysis of a PMR system with DAB downlink

Date
2003
Advisor
Instructor
Source Title
Proceedings of the 8th IEEE Symposium on Computers and Communications, ISCC 2003
Print ISSN
1530-1346
Electronic ISSN
Publisher
IEEE
Volume
Issue
Pages
1153 - 1158
Language
English
Type
Conference Paper
Journal Title
Journal ISSN
Volume Title
Abstract

Several trunked private mobile radio (PMR) systems have been designed over the last decade, most of which have symmetric downlink and uplink channel capacities. These systems may not be spectrally efficient in case of group or broadcast-based voice and data calls, a common feature of PMR systems. We propose a new asymmetric PMR system comprising a wideband OFDM-based downlink and a narrowband uplink, which not only achieves a better spectral efficiency but also can support high bit rate multimedia applications. The system is shown to have high trunking efficiency since all users are assumed to use the pool of channels available in the wideband downlink. In this paper, we study the performance and capacity of a private mobile radio system using a digital audio broadcasting (DAB) downlink. In particular, we study the efficiency of such a system for voice calls using voice activity detection and statistical multiplexing. Moreover, we show that, the efficiency of the system can significantly increase, if the incoming calls, which can not find an available channel, are allowed to wait a certain amount of time before occupying a channel.

Course
Other identifiers
Book Title
Keywords
Available channels, Capacity analysis, Common features, Multimedia applications, Private mobile radio systems, Spectral efficiencies, Trunking efficiency, Voice activity detection, Communication, Efficiency, Orthogonal frequency division multiplexing, Radio broadcasting, Speech recognition, Mobile radio systems
Citation
Published Version (Please cite this version)