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AssigneeResearch In Motion Limited
InventorsWen-Yen Chan, Nasserullah Khan, Xin Jin, Qingzhong Jiao
Estimating the term…
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.
A transmitter for a mobile device, comprising:
A mobile device comprising:
A method of optimizing power efficiency in an amplifier stage, the method comprising:
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:
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:
A method of operating an amplifier stage of a mobile device transmitter for generating a transmission signal, the method comprising:
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:
Dependencies are inferred from the claim text.