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Space Division Multiple Access (SDMA) is a new technology by which the capacity of existing cellular mobile communication systems can economically be increased. Based on adaptive array antenna technology the spatial dimension of the existing system is exploited by means of forming independent radio beams in each of the original channels. Operating SDMA,(More)
In cellular mobile communication networks, the distribution of a customer population in a support area is often clustered. Considering this eeect in network planning is an important aspect which strongly innuences the Quality-of-Service (QoS) experienced subjectively by customers in the network. In this paper, we rst discuss two-dimensional pointprocesses(More)
In this paper we investigate the distributions and the long-range behavior of cycle times and interdeparture times in two semiconductor manufacturing systems. The results were obtained by means of simulation using original work oor level data of semiconductor fabrication facilities. The ndings presented here show that for those semiconductor facilities the(More)