Signal Interference Emulator Using Iterative Residual Subtraction
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Solution Overview
Problem
Conventional methods for simulating interference in communications channels require significant hardware and computing resources, leading to complex, slow, and inaccurate emulators, resulting in low-quality communications.
Innovation Solution
A method and apparatus that extract and reconstruct signal and interference from communication measurements using matched filters, regenerators, and subtractors to iteratively form realistic interference profiles based on measured data, reducing the need for extensive resources and simplifying the emulator structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional synthetic interference simulation methods are used, then interference characteristics can be generated, but hardware and computing resources are excessively consumed
Solution Approach 1:
The patent creates a simplified copy of the interference signal by extracting key characteristics (amplitude, phase, timing) from the received signal and regenerating synthetic interference that replicates the essential properties without requiring full replication of the original complex signal processing chain
Solution Approach 2:
The patent extracts only the necessary interference characteristics from the received signal through correlation processing and impulse response analysis, separating the essential interference properties from the complete signal to create a simplified simulation model that consumes fewer resources
2Reliability
If conventional synthetic interference simulation methods are used, then interference can be generated, but the emulator becomes slow and complex
Solution Approach 1:
The patent generates interference by copying only the essential characteristics (amplitude, phase, timing relationships) rather than processing complete signal waveforms, dramatically reducing computational complexity and increasing emulation speed while preserving interference modeling quality
Solution Approach 2:
The patent transforms the interference representation from complete time-domain waveforms to a set of key parameters (amplitude, phase, delay) that can be processed more efficiently, changing the mathematical representation to improve computational speed while maintaining accuracy
3Device complexity
If conventional interference simulation methods are used, then interference can be emulated, but the accuracy is reduced
Solution Approach 1:
The patent uses an iterative feedback process where the generated interference is correlated with the received signal, the impulse response is updated based on the correlation results, and the process repeats to refine the interference estimate, progressively improving accuracy through multiple iterations
Solution Approach 2:
The patent replaces complex hardware-based interference generation with software-based signal processing using correlation and impulse response analysis, substituting physical complexity with mathematical operations that achieve higher precision
Data Source
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AI summary
The invention relates to a method and a device for extracting the signal components and/or the interference components. In the invention a channel measurement signal is received (4-2), the signal is filtered (4-8), the filtered signal is reconstructed (4-12), the reconstructed signal is subtracted from the channel measurement signal for obtaining a residual signal (r-s); and the residual signal is fed back (4-22) to be combined with the channel measurement signal.