Distributed utility-maximization using a resource pricing power control in uplink DS-CDMA

This letter considers a distributed utility maximization power control scheme in uplink DS-CDMA systems. Maximizing a utility function is solved by Lagrangian dual decomposition, where the Lagrangian multiplier can be considered as a resource price charging to users. By adjusting the price in a distributed fashion, the proposed algorithm results in a bang- bang type power control, ´maximum power transmission´ or ´shutdown´. Numerical result shows that the proposed algorithm achieves around 95% of the optimal utility maximization with a modest computational burden.