Victim System Detector Using Frequency Domain Correlation
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Solution Overview
Problem
In wireless communication systems where frequency bands overlap, existing technologies fail to accurately and efficiently detect victim systems, leading to interference between co-channel communication systems.
Innovation Solution
A victim system detector is developed, utilizing a correlator to calculate correlation values between frequency domain baseband signals and correlation sequences, with a decision unit determining the presence of a victim system based on these values, and including features like bin selection, correlation sequence storage, and threshold adjustment to minimize hardware complexity and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a victim system detector is designed to accurately detect victim systems in overlapping frequency bands, then detection accuracy is improved, but device complexity and size increase
Solution Approach 1:
The patent extracts only the essential correlation calculation function needed for victim system detection, implementing it through a simplified correlator that processes frequency domain baseband signals. By taking out only the necessary detection capability rather than implementing a full-featured communication system, the patent achieves accurate victim system detection while keeping the device size small.
Solution Approach 2:
The patent changes the detection approach from time domain to frequency domain processing. By converting the baseband signal to frequency domain and performing correlation calculations there, the patent achieves efficient detection with reduced computational complexity, allowing accurate detection without proportionally increasing device size.
2Measurement precision
If correlation calculations are performed in the time domain, then detection accuracy is maintained, but computational complexity and processing time increase
Solution Approach 1:
The patent changes the domain of operation from time domain to frequency domain for correlation calculations. By performing Fast Fourier Transforms on the baseband signals and executing correlation in the frequency domain, the patent significantly reduces processing time while maintaining detection accuracy, as frequency domain operations are computationally more efficient for this type of analysis.
3Reliability
If comprehensive signal processing is implemented to ensure accurate victim system detection, then detection reliability is improved, but hardware complexity increases
Solution Approach 1:
The patent extracts only the critical correlation calculation functionality needed for reliable victim system detection, implementing it through a simple correlator structure. By taking out only the essential detection mechanism rather than implementing comprehensive signal processing, the patent achieves reliable detection while minimizing hardware complexity.
Solution Approach 2:
The patent substitutes complex mechanical or hardware-based signal processing with software-based frequency domain correlation calculations. By replacing potential hardware complexity with algorithmic processing in the frequency domain, the patent maintains high detection reliability while reducing overall hardware complexity.
Data Source
AI summary
A victim system detector for detecting whether a second wireless communication system uses frequency bands that are used by a first wireless communication system (detecting whether the second wireless communication system is a victim system) includes a correlator and a decision unit. The correlator calculates a correlation value between a frequency domain baseband signal associated with the first wireless communication system and a correlation sequence of the second wireless communication system. The decision unit determines, based on the correlation value, whether the second wireless communication system is a victim system. Therefore, the victim system is detected accurately and efficiently.