Split-Frequency Amplifier Layout for Full-Duplex Self-Interference
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Solution Overview
Problem
Full-duplex wireless communication systems face challenges due to self-interference, which existing amplification solutions struggle to effectively address, limiting their performance and spectral efficiency.
Innovation Solution
A system for split-frequency amplification that uses multiple parallel amplification paths with different spectral characteristics, including primary and secondary band amplification stages, band-splitting filters, and signal couplers to separate and recombine input signals across distinct frequency bands, optimizing gain and noise performance across a range of frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional amplification solutions are used in full-duplex systems, then device complexity is reduced, but self-interference performance deteriorates
Solution Approach 1:
The amplification system is divided into multiple parallel amplification paths, each optimized for specific frequency bands. The input signal is segmented into different frequency components that are processed separately through tailored amplifier chains, allowing each path to minimize interference in its designated band while maintaining overall system performance.
Solution Approach 2:
Different amplification paths are designed with distinct spectral characteristics tailored to specific frequency ranges. Each amplifier path has optimized gain, noise figure, and linearity parameters for its target frequency band, rather than using a uniform amplification approach across all frequencies.
2Productivity
If multiple parallel amplification paths are used, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The frequency spectrum is segmented into multiple bands, with dedicated amplification paths for each band. This allows simultaneous processing of multiple frequency components through parallel amplifier chains, effectively doubling or tripling spectral utilization compared to single-path systems.
Solution Approach 2:
The parallel amplification paths share common input and output coupling infrastructure, allowing the system to handle multiple frequency bands simultaneously through a unified architecture. The signal couplers and combiners enable universal processing of diverse frequency components through shared hardware resources.
3Reliability
If band-splitting filters are implemented, then noise performance is improved, but device complexity increases
Solution Approach 1:
The filtering function is segmented across multiple parallel paths, with each path containing band-splitting filters optimized for specific frequency ranges. This distributed filtering approach reduces noise in each band by isolating it to dedicated amplifier paths, rather than attempting to filter all frequencies through a single complex filter.
Data Source
AI summary
A system for split-frequency amplification, preferably including: one or more primary-band amplification stages, one or more secondary-band amplification stages, one or more band-splitting filters, and/or one or more signal couplers. An analog canceller including one or more split-frequency amplifiers. A mixer including one or more split-frequency amplifiers. A voltage-controlled oscillator including one or more split-frequency amplifiers. A method for split-frequency amplification, preferably including: receiving an input signal, separating the input signal into signal portions, and/or amplifying the signal portions, and optionally including combining the amplified signal portions and/or providing one or more output signals.