CDMA Power Control Using Optimization Techniques- A Review

Abstract — In this paper power control techniques for code division multiple access (CDMA) system is presented. For CDMA system Power control is the most important system requirement. To function effectively, there is a need to control the power. If power control is not implemented many problems such as the near-far effect will start to dominate and consequently will lower the capacity of the CDMA system. However, when the power control in CDMA systems is applied, it allows multiple users to share resources of the system equally between themselves, leading to increased capacity. With appropriate power control, capacity of CDMA system is high in comparison to frequency division multiple access (FDMA) and time division multiple access (TDMA).For power control in CDMA system optimization algorithms i.e. genetic algorithm & particle swarm algorithm can be used which determines a suitable power vector [1], [2]. These power vector or power levels are determined at the base station and told to mobile units to adjust their transmitting power in accordance to these levels. So a detailed discussion about CDMA system power control is given here