Method and apparatus for optimizing transmitter power efficiency
First Claim
1. A transmitter for a mobile device, comprising:
- an encoder and modulator for generating an encoded and modulated transmit signal based on an input signal;
a digital to analog converter coupled to the encoder and modulator, for generating an analog representation of the encoded and modulated transmit signal;
an amplifier stage coupled to the digital to analog converter, for amplifying the analog representation of the encoded and modulated transmit signal to generate a transmission signal; and
an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage, the amplifier control block comprising at least one mapper to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal.
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Accused Products
Abstract
A transmitter for a mobile device utilizes at least one mapper in order to improve power efficiency while still meeting out of band spurious emissions and waveform quality requirements. An encoder and modulator generates an encoded and modulated transmit signal from an input signal. A digital to analog converter coupled to the encoder and modulator generates an analog representation of the encoded and modulated transmit signal. An amplifier stage coupled to the digital to analog converter amplifies the analog representation of the encoded and modulated transmit signal to generate a transmission signal. The transmitter further comprises an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage. At least one mapper is provided in the amplifier control block, used to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal. Environmental and operating conditions of the transmitter may be accounted for as well in the mappers.
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Citations
24 Claims
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1. A transmitter for a mobile device, comprising:
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an encoder and modulator for generating an encoded and modulated transmit signal based on an input signal; a digital to analog converter coupled to the encoder and modulator, for generating an analog representation of the encoded and modulated transmit signal; an amplifier stage coupled to the digital to analog converter, for amplifying the analog representation of the encoded and modulated transmit signal to generate a transmission signal; and an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage, the amplifier control block comprising at least one mapper to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A mobile device comprising:
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a processor for controlling the operation of the mobile device; a memory coupled to the processor; and a transmitter for generating a transmission signal, the transmitter comprising; an encoder and modulator for generating an encoded and modulated transmit signal based on an input signal; a digital to analog converter coupled to the encoder and modulator, for generating an analog representation of the encoded and modulated transmit signal; an amplifier stage coupled to the digital to analog converter, for amplifying the analog representation of the encoded and modulated transmit signal to generate the transmission signal; and an amplifier control block configured to generate an amplifier control signal for adjusting at least one parameter of the amplifier stage, the amplifier control block comprising at least one mapper to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal.
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20. A method of optimizing power efficiency in an amplifier stage, the method comprising:
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generating an encoded and modulated transmit signal based on an input signal; generating an analog representation of the encoded and modulated transmit signal; amplifying the analog representation of the encoded and modulated transmit signal in the amplifier stage to generate a transmission signal; generating an amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal; and adjusting at least one parameter of the amplifier stage using the amplifier control signal.
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21. A non-transitory computer-readable storage medium storing instructions executable by a processor coupled to the storage medium, the instructions, when executed by the processor, cause the processor to perform acts of a method of optimizing power efficiency in an amplifier stage, said acts comprising:
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generating an encoded and modulated transmit signal based on an input signal; providing the encoded and modulated transmit signal to a digital to analog converter to generate an analog representation of the encoded and modulated transmit signal, wherein the analog representation of the encoded and modulated transmit signal is amplified in the amplifier stage to generate a transmission signal; generating an amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal; and adjusting at least one parameter of the amplifier stage using the amplifier control signal.
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22. A control system for a mobile device transmitter, the mobile device transmitter comprising an amplifier stage for generating a transmission signal, the control system comprising:
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an input terminal for receiving a signal representative of an average transmit power of the transmission signal; at least one mapper for determining an amplifier control signal based on the average transmit power and a peak to average power ratio of the transmission signal; and an output terminal for providing the amplifier control signal to the amplifier stage for adjusting at least one parameter of the amplifier stage.
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23. A method of operating an amplifier stage of a mobile device transmitter for generating a transmission signal, the method comprising:
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receiving a signal representative of an average transmit power of the transmission signal; determining an amplifier control signal by mapping the average transmit power and a peak to average power ratio of the transmission signal to a control value for the amplifier stage; and providing the amplifier control signal to the amplifier stage for adjusting at least one parameter of the amplifier stage according to the control value.
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24. A non-transitory computer-readable storage medium storing instructions executable by a processor coupled to the storage medium, the instructions, when executed by the processor, cause the processor to perform acts of a method of operating an amplifier stage of a mobile device transmitter for generating a transmission signal, said acts comprising:
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receiving a signal representative of an average transmit power of the transmission signal; determining an amplifier control signal by mapping the average transmit power and a peak to average power ratio of the transmission signal to a control value for the amplifier stage; and providing the amplifier control signal to the amplifier stage for adjusting at least one parameter of the amplifier stage according to the control value.
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Specification