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 gain control signal and an average desired transmit power signal, the average desired transmit power signal being based on at least one of a power control instruction signal and a received signal strength indicator signal;
an environmental sensor configured to provide at least one environmental information signal; and
,a power supply level adjustment generator implemented by a plurality of look-up tables, and configured to provide a power supply level adjustment signal based on 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, wherein one look-up table is provided for each of the at least one environmental information signal and the data parameter indication, and outputs of each look-up table are combined to generate the power supply level adjustment signal; and
,a power supply module connected to the average power and gain control block and the power supply level adjustment generator, and configured to provide a variable power supply signal to the output power amplifier block based on the average desired transmit power signal and the power supply level adjustment signal.
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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.
40 Citations
16 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 gain control signal and an average desired transmit power signal, the average desired transmit power signal being based on at least one of a power control instruction signal and a received signal strength indicator signal; an environmental sensor configured to provide at least one environmental information signal; and
,a power supply level adjustment generator implemented by a plurality of look-up tables, and configured to provide a power supply level adjustment signal based on 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, wherein one look-up table is provided for each of the at least one environmental information signal and the data parameter indication, and outputs of each look-up table are combined to generate the power supply level adjustment signal; and
,a power supply module connected to the average power and gain control block and the power supply level adjustment generator, and configured to provide a variable power supply signal to the output power amplifier block based on the average desired transmit power signal and the power supply level adjustment signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of providing power to an output power amplifier block in a wireless communications device, the method comprising:
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receiving a base station radio signal and providing at least one of a received signal strength indicator signal by measuring a signal strength of the base station radio signal, and a power control instruction signal by extracting one or more power control bits from the base station radio signal; generating an average desired transmit power signal based on at least one of the received signal strength indicator signal and the power control instruction signal; generating at least one environmental information signal related to the wireless communications device; generating a power supply level adjustment signal based on a data parameter indication of a baseband outgoing data stream to be transmitted by the wireless device and the at least one environmental information signal, by using the data parameter indication and the at least one environmental information signal as indices into corresponding look-up tables, and combining outputs of the corresponding look-up tables to generate the power supply level adjustment signal; and
,generating a variable power supply signal based on the average desired transmit power signal and the power supply level adjustment signal, and providing the variable power supply signal to the output power amplifier block. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification