Radio Signal Processing Device for Aircraft Communication Reliability
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Solution Overview
Problem
In aircraft radio systems, the existing Best Signal Selection mechanism often fails to accurately distinguish between superposed signals from different sources, leading to the weaker signal being masked by the stronger one, even with small differences in signal levels, which can result in air traffic controllers missing critical communications.
Innovation Solution
A processing device with multiple receivers and a detection apparatus that transforms signals into the frequency domain to identify and separate superposed signals, selecting the receiver with the smallest or greatest level differences to minimize distortion and ensure clear communication, and optionally generating an alert signal to notify air traffic controllers of double transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Best Signal Selection mechanism selects the receiver with the greatest signal level, then the strongest signal is prioritized for clear reception, but superposed weaker signals from different sources are masked and lost
Solution Approach 1:
The detection apparatus segments the received signal by transforming it into the frequency domain to separate and identify individual signal sources. This allows the system to distinguish between superposed signals from different aircraft, enabling selective processing of each source rather than treating the composite signal as a single entity.
Solution Approach 2:
The selection apparatus acts as an intermediary between the multiple receivers and the output system. It uses detection results about the number of sources to intelligently select which receiver's signal to forward, mediating between the conflicting requirements of signal strength and source separation.
2Reliability
If multiple receivers are used to receive radio signals, then signal coverage and redundancy are improved, but the complexity of signal selection and processing increases
Solution Approach 1:
The patent replaces complex mechanical signal switching mechanisms with signal processing in the frequency domain. By using Fourier transformation and spectral analysis, the system can identify and separate signals from different sources through mathematical operations rather than physical signal routing, reducing mechanical complexity.
Solution Approach 2:
The detection apparatus automatically analyzes the frequency spectrum to determine the number of signal sources without requiring manual intervention. The selection apparatus then autonomously selects the appropriate receiver based on detection results, making the system self-managing and reducing operational complexity.
3Illumination intensity
If the receiver with the greatest signal level is selected, then the strongest communication signal is received, but the level difference causes weaker signals to be covered and indistinguishable
Solution Approach 1:
The patent transitions from time-domain signal analysis to frequency-domain analysis. By examining the spectral characteristics of the signal, the system can identify multiple frequency components corresponding to different signal sources, even when they are superposed in the time domain with significant amplitude differences.
Data Source
AI summary
The present invention discloses a processing device for processing a radio signal, comprising a plurality of receivers designed to receive the radio signal in a predetermined frequency range and to output each signal as a received signal, comprising a detection apparatus designed to detect, for each received signal, a number of sources in the corresponding radio signal, comprising a selection apparatus designed, if there is more than one source in at least one of the received signals, to select one of the receivers on the basis of the information on the number of sources in the individual received signals and to forward the received signal of said selected receiver. The present invention also discloses a corresponding method.