The energy consumption of modern communications systems is
dominated by the signal processing and shaping circuitry. Assuming
a rate-independent processing power consumption, the energy per bit
spent for signal processing can be effectively reduced by increasing
the transmission power. The optimal relation between processing and
transmission power for energy efficient communications is derived.
This relation is called processing-to-amplifier power ratio (PrAPR).
Gomez, I.; Marojevic, V.; Gelonch, A. Processing-to-amplifier power ratio for energy efficient communications. "Electronics Letters", 07 Juny 2012, vol. 48, núm. 12, p. 732-734.