Power Distribution and Soft Handoff for Downlink Channels in Cellular CDMA Systems

Power distribution and soft handoff in cellular CDMA downlinks are studied in this paper. An optimum power distribution law is developed in order to guarantee the required signal-to-interference ratio for each connection. Based on this, soft handoff decisions are made at the mobile switching center for each connection based on the current channel conditions and resource availability in each cell. Simulation results show that soft handoff can improve the connection reliability and the system capacity in the downlink transmissions.