Improvement of QoS of Land Mobile Satellite Systems Using Diversity Techniques
In order to enhance the availability and the offered Quality of Service (QoS), Land Mobile Satellite Systems (LMSS) will have the option to use simultaneous transmission via two or more satellite as diversity. In this paper the performance of a TDMA and CDMA single user return link employing such a diversity reception is investigated by means of computer simulation using a multi state mobile satellite channel model. System capacity and availability have been theoretically evaluated under different operating conditions. The obtained results have shown that by using signal combining techniques improvement of the balance between service availability and system capacity is feasible.
Keywords: LMSS, QoS, Diversity, Capacity
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