First-order distributed power control algorithm for TD-SCDMA
Zhang Yong-hua · Journal of tianjin University of Technology · 2010
In TD-SCDMA system,power control technology is one of the key technologies,it not only can overcome the near-far effect,but also can reduce the multiple access interference,in order to enlarge the capacity.In this paper,we propose a distributed,first order power control algorithm.The proposed algorithm uses an exponential function with a modified form of the LMS algorithm in order to achieve a better speed of convergence.We compare the performance of the proposed algorithm and the 3GPP standard algorithm.We demonstrate that the proposed algorithm achieves better convergence and saves on the signal-to-noise ratio(SNR) required to achieve a certain performance.We also demonstrate that the proposed algorithm works well for different mobile speeds with a continuously changing channel.