Power Control Algorithm For Wireless Communication Systems

In wireless communication systems, the power control algorithm is an impor-tant issue to minimize transmitter powers while maintaining acceptable quality-of-service.To reach this purpose, some parameters have to be known by the users in the system.however, in real application, it is difficult to do.The results always take some random noise caused by wireless channel and measured, which will affect the convergence of the algorithms.In this thesis, several conventional power control algorithm and two im-proved distributed power control algorithm have studied, two improved power control algorithms can speed up the convergence.Based on the uniform signal to interference ratio for maximum power control algorithm, we give a condition for achieving the minimum uniform signal to interference ratio, and then introduce a new power control algorithm. The proposed scheme requires only one phase of power convergence in the precess for achieving the minimum uniform signal to interference ratio and less information to be broadcast throughout the network, thus saving time.