Systems and Methods of RF Power Transmission, Modulation, and Amplification, Including Embodiments for Compensating for Waveform Distortion
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Abstract
Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion.
23 Citations
17 Claims
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1. (canceled)
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2. A method for error correction in a power amplifier, the method comprising:
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scaling an output signal from the power amplifier to generate a scaled analog signal; sampling the scaled analog signal; converting the sampled representation of the scaled analog signal to a digital signal; calculating a delay between one or more input signals to the power amplifier and the output signal from the power amplifier based on the digital signal; and adjusting one or more operational parameters of the power amplifier based on the delay. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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9. A system for error correction in a power amplifier, the system comprising:
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an automatic gain controller (AGC) configured to scale an output signal from the power amplifier to generate a scaled analog signal; a sample-and-hold (S/H) circuit configured to sample the scaled analog signal; an analog-to-digital converter (ADC) configured to convert the sampled representation of the scaled analog signal from the S/H circuit to a digital signal; and a digital control module configured to; calculate a delay between one or more input signals to the power amplifier and the output signal from the power amplifier based on the digital signal; and adjust one or more operational parameters of the power amplifier based on the delay. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification