Abstract
AbstractFor a very large number of small earth‐stations with varying transmission time and light traffic, the random multiple access (RMA) transmission system is capable of providing simultaneous access to earth‐stations by associating each station with a unique sequence of code symbols. Each information bit will be transformed into these code symbols, where each symbol is an entry in a discrete time‐frequency matrix. In this paper we propose a system model for RMA transmission systems and illustrate the application of RMA code sequences. The analysis of this transmission system, which causes interference to the desired signal, is presented. The performance parameter considered is the signal‐to‐noise ratio (SNR) at the output of a correlation detector. The analysis shows that the SNR depends on the number of users, the energy per data bit and the design of the time‐frequency matrix which determines the total numbers and values of the time‐delay units associated with any carrier.
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