Non-Linear Interference Detection by Signal Magnitude Correlation
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Solution Overview
Problem
Non-linear interference in wireless communication systems degrades receiver performance by coupling into assigned frequency channels, particularly in cellular base stations, due to active and passive components, and is challenging to detect and mitigate effectively.
Innovation Solution
A method and detector for non-linear interference detection that involves determining the magnitude of victim and offending signals raised to specific powers, correlating these signals to assess interference, and scaling them to enhance detection accuracy, allowing for simultaneous processing of multiple signals and interference analysis without requiring frequency shifting or multiple delay term determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If non-linear interference detection is performed using traditional methods (synthesizing intermodulation products and frequency shifting), then detection capability is achieved, but device complexity and processing time increase significantly
Solution Approach 1:
The patent extracts only the essential correlation operation from the complex traditional detection process. Instead of synthesizing all possible intermodulation products and performing frequency shifting, the invention directly correlates the magnitude of the victim signal with the magnitude of the offending signal, extracting only the correlation step that is truly necessary for detection.
Solution Approach 2:
The patent inverts the traditional detection approach by directly correlating signal magnitudes rather than synthesizing interference products. This inversion simplifies the detection process while maintaining effectiveness, as the correlation of magnitudes directly reveals the presence and strength of non-linear interference without requiring complex signal manipulation.
2Measurement precision
If non-linear interference detection is performed using traditional methods (synthesizing intermodulation products and frequency shifting), then detection capability is achieved, but processing time increases significantly
Solution Approach 1:
The patent extracts only the essential correlation operation from the complex traditional detection process. Instead of synthesizing all possible intermodulation products and performing frequency shifting, the invention directly correlates the magnitude of the victim signal with the magnitude of the offending signal, extracting only the correlation step that is truly necessary for detection.
Solution Approach 2:
The patent segments the detection process into a simple, isolated correlation operation that can be performed independently without requiring complex signal synthesis or frequency transformation steps. This segmentation allows for efficient processing by focusing computation only on the essential correlation task.
3Productivity
If multiple offending signals are processed simultaneously, then detection efficiency improves, but computational complexity increases
Solution Approach 1:
The patent merges the processing of multiple offending signals into a single correlation operation by correlating the victim signal magnitude with the combined magnitude information of all offending signals. This merging approach allows simultaneous detection of multiple interferers without requiring separate processing chains for each signal, thereby improving efficiency while controlling complexity.
Data Source
AI summary
A method, detector and radio unit for non-linear interference detection in a communication system having a victim signal and an offending signal are disclosed. According to one aspect, a method includes determining a magnitude of the victim signal raised to a first power to produce a first signal. The method also includes determining a magnitude of the offending signal raised to a second power to produce a second signal. The first signal and the second signal are correlated to produce an output signal indicative of an extent to which the offending signal interferes with the victim signal.