Self-consistent Outphasing Signal Separation for Linear Distortion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional outphasing methods using nonlinear power amplifiers introduce linear distortions and spectral impurities due to physical differences in analog components and frequency response, with digital pre-distortion approaches being complex and inefficient, leading to power consumption losses and reduced system efficiency.
Innovation Solution
A self-consistent outphasing signal separation system that splits variable-envelope signals into constant-envelope signals using digital electronic components and analog component chains, implementing trigonometric functions to maintain continuous phase and reduce phase ambiguities, allowing for linear pre-equalization and improved spectral purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional outphasing methods using nonlinear power amplifiers are used, then power amplification efficiency is improved, but linear distortions and spectral impurities are introduced
Solution Approach 1:
The patent divides the variable-envelope input signal into two separate constant-envelope component signals that are processed through parallel analog component chains. This segmentation allows each chain to operate with constant-envelope signals that are less susceptible to nonlinear distortion, while the parallel structure enables independent optimization of each path to compensate for component variations and reduce spectral impurities.
Solution Approach 2:
The patent transforms the signal envelope parameter from variable to constant by separating the input signal into two constant-envelope components. This parameter change fundamentally alters the operating conditions of the analog components, allowing them to operate in a more linear regime while maintaining power amplification efficiency through the parallel architecture.
2Object-generated harmful factors
If digital pre-distortion is applied to decrease nonlinear signal distortion, then signal distortion is reduced, but algorithm complexity and power consumption increase
Solution Approach 1:
The patent replaces complex digital pre-distortion algorithms with a simpler analog signal processing approach. By converting the variable-envelope signal into constant-envelope signals and using parallel analog component chains with appropriate filtering and combining, the system achieves distortion reduction through hardware architecture rather than complex computational algorithms, thereby lowering device complexity and power consumption.
3Object-generated harmful factors
If digital pre-distortion algorithms are implemented, then signal distortion is compensated, but power consumption increases
Solution Approach 1:
The patent substitutes energy-intensive digital pre-distortion computations with an analog signal processing approach using parallel component chains. The constant-envelope signals are processed through analog filters and amplifiers that operate more efficiently, reducing the overall power consumption while still achieving effective distortion compensation through the parallel architecture and signal separation.
4Power
If analog components are used in the signal chain, then power amplification is achieved, but physical differences introduce linear distortions
Solution Approach 1:
The patent segments the signal processing into two parallel analog component chains, each handling one of the two constant-envelope signals. This segmentation allows for independent calibration and optimization of each chain, enabling compensation for physical differences between components. The parallel structure provides redundancy that can be used to correct for manufacturing variations and maintain high signal reconstruction accuracy.
Solution Approach 2:
By changing the signal envelope parameter from variable to constant, the patent fundamentally alters the operating conditions of the analog components. Constant-envelope signals allow the analog components to operate in a more controlled and predictable manner, reducing the impact of physical differences and manufacturing variations on signal distortion, thereby improving reconstruction accuracy.
Data Source
AI summary
Embodiments are directed to systems, apparatuses and methods for providing self-consistent outphasing signal separation. In one scenario, such an apparatus includes the following: a receiver configured to receive a variable-envelope signal and an outphasing separator including a digital electronic component configured to split the received variable-envelope signal into first and second constant-envelope signals. Splitting the received variable-envelope signal includes implementing various trigonometric or other functions using a consistent phase. The apparatus further includes a first analog component chain that includes various analog electrical components configured to receive and process the first constant-envelope signal, as well as a second analog component chain that includes various analog electrical components configured to receive and process the second constant-envelope signal. The apparatus also includes an analog combiner configured to combine the first and second constant-envelope signals for transmission to other entities or systems.