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In this paper, the impacts of interference from a satellite ground station on a personal communication system (PCS) are modeled. A semi-analytical model is first developed to predict the BER performance of a typical PCS base station receiver in the presence of interference from a satellite ground station. The model takes into account the relative transmitted power, waveform structures, antenna patterns, relative geometry, and traffic patterns for both the PCS and satellite ground station systems. In order to assess the accuracy of the semi-analytical model, a simulation model is developed, which more accurately describes the PCS base-station receiver. Simulations are run for a small set of conditions and results show that the predictions of the simulation and semi-analytical models are in close agreement.