A Design Methodology for Link Adaptation Schemes using Constellations of Constant PAPR

The energy-efficient design of short-distance wireless communication systems requires the inclusion of circuit energy consumption in the system´s total energy budget. We consider the design of link adaptation schemes in which circuit energy consumption is included in the total energy budget, in which a set of signal constellations of constant peak-to-average power ratio (PAPR) is used, and in which the transmitted power is kept constant whatever be the particular signal constellation in use. We show how the dimensionality of the associated non-linear optimisation problem can be reduced from N + 1 to one, where N denotes the number of available transmission schemes. These principles are then applied to a design example.