Abstract:
Using discrete event stochastic simulation by batch-means, the CDMA(Code Division Multiple Access) system capacity is investigated under perfect power control. Simulation software was written in C to simulate the CDMA system; and the simulation warm-up period, run time, and blocking probability results are analysed. Some results of the simulation model are verified with the analytical results. The GoS (Grade of Service) of an end-to-end CDMA communication networks is also investigated.· Because CDMA capacity is limited by the interference received from other mobile users, the interference from neighbouring cells is analysed and the results are compared with previously published upper bounds. The impact of the propagation parameters on interference is investigated. The impact of considering various numbers of base stations in order to find the base station that provides the best signal is discussed. Next, the effect of various numbers of tiers of neighbouring cells on the performance of CDMA systems is investigated. The traffic capacities of FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA protocols are determined and compared. New results have been obtained by analysing the sensitivity of the CDMA Erlang capacity to a range of CDMA network parameters. The most (least) important parameter that has the most (least) significant influence on the system capacity is then identified. By using the simulation model, the number of users supported by the CDMA system under study is determined and the results are compared with the analytical results.