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In this paper we present two new control algorithms that potentially can be used as efficient techniques for power updates in wireless CDMA communication networks. The algorithms are obtained by optimizing the signal-to-interference error. The control laws are distributed, respectively linear and bilinear, and require either estimation of the channel interference (or a quantity inversely proportional to the signal interference) or the development of efficient numerical algorithms for solving the set of algebraic equations obtained. In addition, ideas of how to accelerate the convergence of a Nash game power control algorithm are presented.