On the capacity of cellular CDMA system up-links with multiple base station diversity

This paper considers the effects of base station diversity on the capacity of a cellular CDMA system. Closed loop power control is assumed to maintain the received power constant at the base station receiving the second or third strongest signal for dual or triple diversity, as opposed to the strongest for conventional CDMA. The probability distributions of the power ratios between signals received at two such base stations (ranked in descending order of received signal strength) are obtained, and these lead to a measure of the reduction in the overall capacity of a system brought about by high power interferers affecting one base station but controlled by a neighbouring one.