Method and apparatus for improving power amplifier efficiency in wireless communication systems having high peak to average power ratios
First Claim
1. A power management system for powering an output power amplifier block in a wireless communication device, the power management system comprising:
- an average power and gain control block configured to provide a single gain control signal to control gain in the output power amplifier block, the single gain control signal being based on at least one of a power control instruction signal and a received signal strength indicator signal;
an environmental sensor unit configured to provide at least one environmental information signal related to the wireless communication device;
a power supply level adjustment generator configured to provide a power supply level adjustment signal based on a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal;
a summer configured to sum the single gain control signal and an altered version of the power supply level adjustment signal to generate a first power control signal;
a clipper configured to receive the first power control signal and generate a second power control signal; and
a switch converter configured to receive the second power control signal and generate the single variable power supply signal;
wherein the power management system is configured to provide a single variable power supply signal to the output power amplifier block, the single variable power supply signal being based on information related to the single gain control signal, the power supply level adjustment signal and the at least one environmental information signal.
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Accused Products
Abstract
A power management system and method for a wireless communication device generates an average desired transmit power signal based on at least one of a received signal strength indicator signal and a power control instruction signal from a base station. A power supply level adjustment signal is generated based on the data parameters of an outgoing data stream and at least one environmental information signal. A combination of the power supply level adjustment signal and the average desired transmit power or a gain control signal and an altered version of the power supply level adjustment signal is used to generate a variable power supply signal that is provided to an output amplifier block for sufficiently generating outgoing wireless device radio signals while reducing power loss in the output amplifier block.
39 Citations
19 Claims
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1. A power management system for powering an output power amplifier block in a wireless communication device, the power management system comprising:
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an average power and gain control block configured to provide a single gain control signal to control gain in the output power amplifier block, the single gain control signal being based on at least one of a power control instruction signal and a received signal strength indicator signal; an environmental sensor unit configured to provide at least one environmental information signal related to the wireless communication device; a power supply level adjustment generator configured to provide a power supply level adjustment signal based on a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal; a summer configured to sum the single gain control signal and an altered version of the power supply level adjustment signal to generate a first power control signal; a clipper configured to receive the first power control signal and generate a second power control signal; and a switch converter configured to receive the second power control signal and generate the single variable power supply signal; wherein the power management system is configured to provide a single variable power supply signal to the output power amplifier block, the single variable power supply signal being based on information related to the single gain control signal, the power supply level adjustment signal and the at least one environmental information signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of providing power to an output power amplifier block in a wireless communication device, the method comprising:
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generating a single gain control signal to control gain in the output power amplifier block, the single gain control signal being based on at least one of a power control instruction signal and a received signal strength indicator signal; generating at least one environmental information signal related to the wireless communication device; generating a power supply level adjustment signal based on a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal; and generating and providing a single variable power supply signal to the output power amplifier block, the single variable power supply signal being based on information related to the single gain control signal, the power supply level adjustment signal and the at least one environmental information signal; wherein generating the single variable power supply signal comprises summing the single gain control signal and an altered version of the power supply level adjustment signal to generate a first power control signal, passing the first power control signal through a clipper to generate a second power control signal, and converting the second power control signal with a switch converter to generate the single variable power supply signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A wireless communication device comprising an output power amplifier block and a power management system configured to provide power supply and gain control to the output power amplifier block, wherein the power management system comprises:
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an average power and gain control block configured to provide a single gain control signal to control gain in the output power amplifier block, the single gain control signal being based on at least one of a power control instruction signal and a received signal strength indicator signal; an environmental sensor unit configured to provide at least one environmental information signal related to the wireless communication device; a power supply level adjustment generator configured to provide a power supply level adjustment signal based on a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal; a summer configured to sum the single gain control signal and an altered version of the power supply level adjustment signal to generate a first power control signal; a clipper configured to receive the first power control signal and generate a second power control signal; and a switch converter configured to receive the second power control signal and generate the single variable power supply signal; wherein the power management system is configured to provide a single variable power supply signal to the output power amplifier block, the single variable power supply signal being based on information related to the single gain control signal, the power supply level adjustment signal and the at least one environmental information signal. - View Dependent Claims (15)
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16. A power management system for powering an output power amplifier block in a wireless communication device, the power management system comprising:
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a summer configured to sum a gain control signal and an altered version of a power supply level adjustment signal to generate a first power control signal; a clipper configured to receive the first power control signal and generate a second power control signal; and a switch converter configured to receive the second power control signal and generate the single variable power supply signal, wherein the gain control signal is based on at least one of a power control instruction signal and a received signal strength indicator signal received by the wireless communication device, the power supply level adjustment signal is based on a baseband outgoing data stream to be transmitted by the wireless communication device and at least one environmental information signal related to the wireless communication device. - View Dependent Claims (17)
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18. A power management system for powering an output power amplifier block in a wireless communication device, the power management system comprising:
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an average power and gain control block configured to provide a single gain control signal to control gain in the output power amplifier block, the single gain control signal being based on at least one of a power control instruction signal and a received signal strength indicator signal; an environmental sensor unit configured to provide at least one environmental information signal related to the wireless communication device; and a power supply level adjustment generator configured to provide a power supply level adjustment signal based on a baseband outgoing data stream to be transmitted by the wireless communication device and the at least one environmental information signal; wherein the power management system is configured to provide a single variable power supply signal to the output power amplifier block, the single variable power supply signal being based on information related to the single gain control signal, the power supply level adjustment signal and the at least one environmental information signal; and wherein the power supply level adjustment generator is implemented by a plurality of look-up tables, wherein one look-up table is provided for each environmental information signal and the data parameter indication, and the outputs of each look-up table are combined to generate the power supply level adjustment signal. - View Dependent Claims (19)
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Specification