Patent ID: 7333563

Claim:
A power management system for providing a variable power supply signal to an output power amplifier block in a wireless communication device, the power management system comprising: (a) an average power and gain control block for providing a gain control signal in response to at least one of a power control instruction signal and a received signal strength indicator signal and providing the gain control signal to the output power amplifier block; (b) an environmental sensor unit for providing at least one environmental information signal; (c) a power supply level adjustment generator connected to the environmental sensor unit for providing an altered version of a power supply level adjustment signal in response to a data parameter indication of a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal; and, (d) a power supply means connected to the average power and gain control block and the power supply level adjustment generator, the power supply means provides the variable power supply signal to the output power amplifier block by providing a first power control signal based on the gain control signal and the altered version of the power supply level adjustment signal, clipping the first power control signal to provide a second power control signal and generating the variable power supply signal based on the second power control signal, wherein, the gain control signal is adapted for applying sufficient gain to a transmission signal version of the baseband outgoing data stream and the altered version of the power supply level adjustment signal is adapted for providing a small sufficient amount of headroom to efficiently provide power to transmit the transmission signal.