Combining Network Utility Maximization and Adaptive Modulation

We combine network utility maximization with adaptive modulation and examine adaptive rate and adaptive transmission powers schemes that maximize average utility, subject to constraints on average transmission power and BER. A broad class of parameterized utility functions is considered as are instantaneous and average BER. Closed form optimal strategies are found for several commonly used classes of modulation. In many cases these functions adapt to changing channel conditions differently than functions designed to maximize spectral efficiency.