Abstract
In some private mobile radio/public access mobile radio (PMR/PAMR) applications, there is a stringent need for high-coverage locations probabilities. A spectrally efficient approach in this case is the use of several radio transmitters operating in a simulcast mode. There have been several analog mobile radio systems working in this way up to now, but less is known about the performance of digital trunked radio systems operating in simulcast mode. In this paper, predicted digital Trans-European Trunk RAdio (TETRA) system performance results operating in a quasi-synchronous mode are presented. These results were obtained by simulation of such a system under a wide range of operational conditions. A comparison is also presented with the European analog standard MPT 1327 currently in operation. It has been concluded that quasi-synchronous techniques well known in analog PMR/PAMR can also be successfully used in digital PMR/PAMR applications.
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