Input Amplitude Modulated Outphasing with an Unmatched Combiner
First Claim
1. An amplifier system comprisinga digital signal component separator configured to split an amplitude and phase modulated signal into a first phase modulated signal and a second phase modulated signal,a non-isolating combiner configured to perform a signal summation of the first phase modulated signal and the second phase modulated signal,a first power amplifier configured to perform amplification of the first phase modulated signal before the signal summation, anda second power amplifier configured to perform amplification of the second phase modulated signal before the signal summation,wherein the amplifier system is configured to apply a signal component separator algorithm such that the first phase modulated signal and the second phase modulated signal are allowed to take on several discrete and/or continuous amplitude levels in order to achieve a maximum efficiency at each desired output signal power level, without restricting the input signal power fed to the power amplifiers to a constant level, wherein for each desired output signal power level, the digital signal component separator assigns an amplitude and phases of input signals that result in a maximum instantaneous power efficiency of the amplifier system.
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Accused Products
Abstract
An amplifier system is disclosed, configured to apply a signal component separator algorithm such that the first phase modulated signal and the second phase modulated signal are allowed to take on several continuous amplitude levels in order to achieve a maximum efficiency at each desired output signal power level, without restricting the input signal power fed to the power amplifiers to a constant level, wherein for each desired output signal power level, the digital signal component separator assigns an amplitude and phases of input signals that result in a maximum instantaneous power efficiency at the amplified output signal combined with an unmatched/non-isolating combiner (e.g. Chireix combiner).
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Citations
17 Claims
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1. An amplifier system comprising
a digital signal component separator configured to split an amplitude and phase modulated signal into a first phase modulated signal and a second phase modulated signal, a non-isolating combiner configured to perform a signal summation of the first phase modulated signal and the second phase modulated signal, a first power amplifier configured to perform amplification of the first phase modulated signal before the signal summation, and a second power amplifier configured to perform amplification of the second phase modulated signal before the signal summation, wherein the amplifier system is configured to apply a signal component separator algorithm such that the first phase modulated signal and the second phase modulated signal are allowed to take on several discrete and/or continuous amplitude levels in order to achieve a maximum efficiency at each desired output signal power level, without restricting the input signal power fed to the power amplifiers to a constant level, wherein for each desired output signal power level, the digital signal component separator assigns an amplitude and phases of input signals that result in a maximum instantaneous power efficiency of the amplifier system.
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7. A method for operating an amplifier system comprising
a digital signal component separator configured to split an amplitude and phase modulated signal into a first phase modulated signal and a second phase modulated signal, a non-isolating combiner configured to perform a signal summation of the first phase modulated signal and the second phase modulated signal, a first power amplifier configured to perform amplification of the first phase modulated signal before the signal summation, and a second power amplifier configured to perform amplification of the second phase modulated signal before the signal summation, wherein the method comprises applying a signal component separator algorithm such that the first phase modulated signal and the second phase modulated signal are allowed to take on several discrete and/or continuous amplitude levels in order to achieve a maximum efficiency at each desired output signal power level, without restricting the input signal power fed to the power amplifiers to a constant level, wherein for each desired output signal power level, the digital signal component separator assigns an amplitude and phases of input signals that result in a maximum instantaneous power efficiency of the amplifier system.
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17. A circuit element for an amplifier system comprising
a digital signal component separator configured to split an amplitude and phase modulated signal into a first phase modulated signal and a second phase modulated signal, a non-isolating combiner configured to perform a signal summation of the first phase modulated signal and the second phase modulated signal, a first power amplifier configured to perform amplification of the first phase modulated signal before the signal summation, and a second power amplifier configured to perform amplification of the second phase modulated signal before the signal summation, wherein the circuit element is configured to apply a signal component separator algorithm such that the first phase modulated signal and the second phase modulated signal are allowed to take on several discrete and/or continuous amplitude levels in order to achieve a maximum efficiency at each desired output signal power level, without restricting the input signal power fed to the power amplifiers to a constant level, wherein for each desired output signal power level, the digital signal component separator assigns an amplitude and phases of input signals that result in a maximum instantaneous power efficiency of the amplifier system.
Specification