  One of the goals of this paper is to contribute to finding distributed power
control strategies which exploit efficiently the information available about
the global channel state; it may be local or noisy. A suited way of measuring
the global efficiency of a distributed power control scheme is to use the
long-term utility region. First, we provide the utility region characterization
for general utility functions when the channel state obeys an independent block
fading law and the observation structure is memoryless. Second, the
corresponding theorem is exploited to construct an iterative algorithm which
provides one-shot power control strategies. The performance of the proposed
algorithm is assessed for energy-efficient and spectrally efficient
communications and shown to perform much better than state-of-the-art
techniques, with the additional advantage of being applicable even in the
presence of arbitrary observation structures such as those corresponding to
noisy channel gain estimates.
