Binary Signal Amplification for Linear Bandpass Power Output
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Solution Overview
Problem
Current amplifiers for bandpass signals in wireless communication suffer from low power efficiency and introduce nonlinear distortions, which lead to undesired emissions and signal degradation, particularly at high frequencies, due to their inherent nonlinearity and the need for complex hardware solutions.
Innovation Solution
A device and method that involve a power amplifier and a modulation device to generate a binary input signal by combining the real and imaginary parts of a complex-valued input signal with a carrier signal, ensuring amplification with increased power efficiency and reduced distortions within the desired frequency band, using a combination of adders, multipliers, and reconstruction filters to maintain signal linearity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power amplifier is used to amplify bandpass signals, then the output power is increased, but nonlinear distortions and out-of-band emissions are introduced
Solution Approach 1:
The patent segments the complex-valued bandpass signal into its real and imaginary components, processes each component separately through individual switching amplifiers, and then recombines them. This segmentation allows each amplifier to operate in a linear switching mode without introducing nonlinear distortions to the overall signal, while still achieving high power efficiency.
Solution Approach 2:
The patent introduces an intermediary processing stage where the complex signal is decomposed into real and imaginary parts, modulated onto carrier frequencies, and then amplified. This intermediary representation allows the use of linear switching amplifiers that avoid nonlinear distortions while maintaining the integrity of the original bandpass signal.
2Loss of energy
If a switching amplifier is used to achieve high efficiency, then power efficiency is improved, but amplitude information is lost
Solution Approach 1:
The patent transitions from amplifying a single complex signal to amplifying two separate real signals (real and imaginary components) in parallel. This dimensional transformation allows the use of switching amplifiers for each component while preserving the amplitude information through the quadrature relationship between the two components.
Solution Approach 2:
The patent changes the signal representation from a single complex-valued signal to two real-valued signals (in-phase and quadrature components). This parameter change enables the use of linear switching amplifiers that operate on real signals while the combined output preserves the original amplitude and phase information of the complex signal.
3Object-generated harmful factors
If linear amplification is used to avoid distortions, then signal linearity is improved, but power efficiency decreases
Solution Approach 1:
The patent employs periodic switching action in the switching amplifiers, where the amplifiers operate in a linear switching mode with controlled transitions. This periodic switching allows the amplifiers to maintain high efficiency while the combined output of the in-phase and quadrature paths preserves signal linearity and avoids nonlinear distortions.
Solution Approach 2:
The patent merges the outputs of two separate switching amplifier paths (in-phase and quadrature) to produce the final amplified bandpass signal. This combining process preserves the linear characteristics of the original signal while benefiting from the high efficiency of switching amplification in each path.
4Object-generated harmful factors
If complex hardware solutions are used to reduce distortions, then signal quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the signal processing function into separate in-phase and quadrature paths, each with its own simple switching amplifier. This segmentation eliminates the need for complex linear amplification circuits while maintaining signal quality through the parallel processing and recombination of the two simplified paths.
Data Source
AI summary
A method and a device for amplifying an input signal include a power amplifier for amplifying a binary input signal, a modulation device for generating the binary input signal on the basis of the input signal, the input signal being a complex-valued signal and the binary input signal being a real-valued signal, the modulation device including an adding device configured to add the complex-valued input signal to a complex-valued carrier signal of a predefined frequency and to thus generate a resulting complex-valued signal, and the modulation device including a combination device connected downstream from the adding device and configured to generate the real-valued binary input signal from the real part and the imaginary part of the resulting complex-valued signal by combining the real part and the imaginary part of the resulting complex-valued signal.