METHOD AND APPARATUS FOR OPTIMIZING TRANSMITTER POWER EFFICIENCY
First Claim
1. A transmitter for a mobile device, the transmitter comprising:
- an amplifier stage coupled to the digital to analog converter and configured to amplify an analog representation of an 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 signal being generated based on mapping a peak to average power ratio and an average transmit power of the transmission signal and wherein the amplifier control block is configured to operate synchronously with a change in an input signal, from which the encoded and modulated transmit signal is derived, to compensate for a step response in the transmission signal to the small change in the input signal.
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Accused Products
Abstract
A transmitter for a mobile device utilizes at least one mapper 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 and a DAC then generates an analog representation of the encoded and modulated transmit signal. An amplifier stage coupled to the DAC amplifies the analog representation of the encoded and modulated transmit signal to generate a transmission signal. The transmitter further comprises an amplifier control block that generates an amplifier control signal to adjust at least one parameter of the amplifier stage. The amplifier control block includes 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. Environmental and operating conditions of the transmitter may be accounted for in the mappers.
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Citations
20 Claims
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1. A transmitter for a mobile device, the transmitter comprising:
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an amplifier stage coupled to the digital to analog converter and configured to amplify an analog representation of an 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 signal being generated based on mapping a peak to average power ratio and an average transmit power of the transmission signal and wherein the amplifier control block is configured to operate synchronously with a change in an input signal, from which the encoded and modulated transmit signal is derived, to compensate for a step response in the transmission signal to the small change in the input 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 method of optimizing power efficiency in an amplifier stage, the method comprising:
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amplifying an analog representation of an encoded and modulated transmit signal in the amplifier stage to generate a transmission signal; generating an amplifier control signal based on mapping a peak to average power ratio and an average transmit power of the transmission signal; operating synchronously with a change in an input signal, from which the encoded and modulated transmit signal is derived, to compensate for a step response in the transmission signal to the small change in the input signal; and adjusting at least one parameter of the amplifier stage using the amplifier control signal. - View Dependent Claims (20)
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Specification