Leg Combining by FFT Selection for Signal Noise Reduction
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Solution Overview
Problem
In communication systems with multiple wired links, noise and reflections from overlapping frequency ranges reduce signal-to-noise ratios, limiting the available frequencies and complicating frequency allocation among devices.
Innovation Solution
A system with frequency transformation circuits and a leg combining circuit that autonomously selects the best frequency transformation output based on power levels, isolating noise and reflections to improve signal-to-noise ratios by combining signals from multiple legs into a single channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple legs are combined to accommodate more network devices, then the number of communicating devices increases, but noise and reflections from overlapping frequency ranges reduce signal-to-noise ratios
Solution Approach 1:
The patent segments the frequency spectrum into multiple non-overlapping frequency ranges (first frequency range, second frequency range, etc.) for different legs. Each leg is assigned specific frequency ranges, preventing frequency overlap and associated noise interference. This segmentation allows multiple legs to operate simultaneously without degrading signal-to-noise ratios.
Solution Approach 2:
The patent introduces frequency range allocation as an additional dimension for managing multiple legs. Instead of time-division only, the system uses frequency-domain allocation where each leg operates in designated frequency ranges. This dimensional approach enables parallel communication across multiple legs while maintaining signal quality through frequency separation.
2Power
If frequency division multiplexing is employed to provide high bandwidth, then bandwidth increases, but frequency allocation becomes complex and unwieldy
Solution Approach 1:
The patent segments the available frequency spectrum into distinct, non-overlapping frequency ranges assigned to different legs. This segmentation simplifies frequency allocation by providing clear, discrete frequency blocks for each leg, eliminating the complexity of managing overlapping frequency assignments while maintaining high bandwidth capacity.
3Productivity
If multiple taps communicate through overlapping frequency ranges, then more devices can communicate simultaneously, but noise from different legs reduces signal quality
Solution Approach 1:
The patent assigns specific non-overlapping frequency ranges to different legs, preventing frequency overlap between simultaneous communications. This segmentation allows multiple taps to communicate concurrently while maintaining signal quality by eliminating noise from overlapping frequency ranges.
Solution Approach 2:
The patent applies different frequency ranges to different legs, creating localized frequency allocations. Each leg operates in its designated frequency range, ensuring that noise from one leg does not interfere with another leg's communications. This local quality approach maintains signal quality while enabling simultaneous multi-device communication.
Data Source
AI summary
In some aspects, the disclosure is directed to methods and systems for improving signal to noise ratios of signals from multiple communication links. In some embodiments, a system includes a first frequency transformation circuit configured to transform a first signal in a time domain received from a first device into a corresponding second signal in a frequency domain. The system further includes a second frequency transformation circuit configured to transform a third signal in the time domain received from a second device into a corresponding fourth signal in the frequency domain. The system further includes a leg combining circuit configured to select, for a group of subcarriers, one of the first frequency transformation circuit and the second frequency transformation circuit, and cause, for the group of subcarriers, the selected frequency transformation circuit to output one of the second signal and the fourth signal, according to the selection.