The effect of imperfect power control on the capacity of reverse channel in cellular CDMA system with antenna arrays

안테나 배열을 이용한 CDMA 셀룰라 시스템에서 불완전 전력제어가 역방향 채널 용량에 미치는 효과

In this paper, we analyze the effect of imperfect power control on the capacity of the reverse channel in CDMA cellular system with antenna arrays in the base station. For imperfect power control, we assume that the received power at the base station from the users within each cell has log-normal distribution, and we also consider the effect of imperfect power control of co-channel interferences which arise from both its own cell and outer cells. From the result of numerical analysis, we show that the degree of power control gives a great influence on the capacity of CDMA celluar system with antenna arrays, and also that antenna arrays at the base station can improve greatly the system capacity even when the power control is imperfect.