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 a transmitter of a wireless device, the transmitter comprising a power amplification block for generating an amplified transmission signal, and the power management system comprising:
- an environmental sensor unit for providing at least one environmental information signal representing an operating environment of the mobile device; and
a power supply level adjustment generator configured to receive the at least one environmental information signal and to generate a power supply level adjustment signal by combining power supply level adjustment values stored in a plurality of look-up tables comprising one look-up table for each of the at least one environmental information signal and a data parameter indicator of a baseband outgoing data stream to be transmitted by the wireless device, the power supply level adjustment signal for combining with an average desired transmit power signal representing an average transmit power of the amplified transmission signal to generate a variable power supply signal for the power amplification block.
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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.
93 Citations
21 Claims
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1. A power management system for a transmitter of a wireless device, the transmitter comprising a power amplification block for generating an amplified transmission signal, and the power management system comprising:
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an environmental sensor unit for providing at least one environmental information signal representing an operating environment of the mobile device; and a power supply level adjustment generator configured to receive the at least one environmental information signal and to generate a power supply level adjustment signal by combining power supply level adjustment values stored in a plurality of look-up tables comprising one look-up table for each of the at least one environmental information signal and a data parameter indicator of a baseband outgoing data stream to be transmitted by the wireless device, the power supply level adjustment signal for combining with an average desired transmit power signal representing an average transmit power of the amplified transmission signal to generate a variable power supply signal for the power amplification block. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of managing power in a transmitter of a wireless device, the transmitter comprising a power amplification block for generating an amplified transmission signal, and the method comprising:
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generating at least one environmental information signal representing an operating environment of the mobile device; storing power supply level adjustment values in a plurality of look-up tables comprising one look-up table for each of the at least one environmental information signal and a data parameter indicator of a baseband outgoing data stream to be transmitted by the wireless device; outputting a power supply level adjustment value from each of the plurality of look-up tables based on the at least one environmental information signal and the data parameter indicator; and combining the power supply level adjustment value outputted from each of the plurality of look-up tables to generate a power supply level adjustment signal for combining with an average desired transmit power signal representing an average transmit power of the amplified transmission signal to generate a variable power supply signal for the power amplification block. - View Dependent Claims (8, 9, 10, 11)
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12. A power management system for a transmitter of a wireless device, the power management system comprising:
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a power supply level adjustment generator configured to generate a power supply level adjustment signal by combining power supply level adjustment values stored in a plurality of look-up tables comprising one look-up table for each of at least one environmental information signal representing an operating environment of the mobile device and a data parameter indicator of a baseband outgoing data stream to be transmitted by the wireless device; and a power supply module configured to receive the power supply level adjustment signal and to generate a variable power supply signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A power supply level adjustment generator for a power supply module of a transmitter of a mobile device, the power management system comprising:
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a plurality of look-up tables storing power supply level adjustment values for the power supply module, each look-up table indexed by one of a corresponding plurality of parameters comprising one or more environmental parameters of the wireless device and a data parameter indicator of a baseband outgoing data stream to be transmitted by the wireless device; and an adder configured to generate a power supply level adjustment signal by adding together a power supply level adjustment value outputted from each of the plurality of look-up tables, the power supply level adjustment signal for combining with an average desired transmit power signal to generate a variable power supply signal for a power amplification block using the power supply module.
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Specification