Abstract
This paper describes in particular Random Division Multiple Access (RDMA) applicable in Mobile Satellite Communications (MSC). In satellite communication systems, as a rule, especially in Mobile Satellite Communications (MSC) many users are active at the same time. The problem of simultaneous communications between many single or multipoint mobile satellite users, however, can be solved by using Multiple Access (MA) technique. Since the resources of the systems such as the transmitting power and the bandwidth are limited, it is advisable to use the channels with complete charge and to create a different MA to the channel. This generates a problem of summation and separation of signals in the transmission and reception parts, respectively. Deciding this problem consists in the development of orthogonal channels of transmission in order to divide signals from various users unambiguously on the reception part.
Highlights
In satellite fixed and mobile communication systems, as a rule, many users are active at the same time
Since the resources of the systems such as the transmitting power and the bandwidth are limited, it is advisable to use the channels with complete charge and to create a different Multiple Access (MA) to the channel
The bandwidth of a repeater channel is divided into many sub-bands each assigned to the carrier transmitted by an Earth station
Summary
In satellite fixed and mobile communication systems, as a rule, many users are active at the same time. These special methods of MA techniques are widely in use with many advantages and disadvantages, together with their combination of hybrid schemes or with other types of modulations. Its mean value indicates the mean time between the generation of a message and its correct reception by the destination station
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