Performance analysis of adaptive power and rate control in wideband CDMA systems
宽带CDMA系统的自适应功率和速率控制性能分析

In this paper, a novel adaptive power and rate control scheme is studied, the BER (Bit Error Rate) formula for the wideband CDMA system with this scheme is derived, and the numerical results of performance analysis in flat fading and frequency-selective channels are given respectively. In this scheme, the transmit power and rate are adapted by the mobile based on the variations of the fading channel. Firstly the predicted Probability Distribution Function (PDF) is divided into several regions equally, and the threshold values among these regions are got. Then the thresholds are used in adaptive power and rate control in a way similar to the traditional power control technique. The numerical results show that the theoretical BER performance of wideband CDMA system can be improved effectively by this scheme.