Capacity evaluation for CDMA cellular systems

In this paper, we find bounds and approximations for the capacity of mobile cellular communication networks based on code division multiple access (CDMA). We develop efficient analytic techniques for capacity calculations of CDMA cellular networks. Each cell is modeled as an independent M/G/∞ queue and traffic capacity assessed based on the maximum Erlang traffic that leads to acceptable link quality with high probability. Subsequently, approximations and bounds for the outage probability and hence traffic capacity are obtained using asymptotic expansions and large deviations theory. Numerical examples, considering uniform and normalized truncated Gaussian user density in the system are evaluated. The propagation model we consider takes care of distance and lognormal shadowing losses