In cellular systems, the available spectrum is partitioned among the BSs, and a given frequency is reused at the closest possible distance that the radio link will allow. Smaller cells have a shorter distance between reused frequencies, and this results in increased spectral efficiency and traffic carrying capacity. Dramatic improvement in spectral efficiency is the main reason for the interest in microcells. However, the microcellular propagation environment is highly erratic. Distributed resource allocation algorithms must be used to maintain high link quality. Frequency Spectrum The available spectrum is limited. The…
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