Communication RF Interference Detection Through Signal Cancellation
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Solution Overview
Problem
Existing 5G communication systems face continuous interference issues due to the coexistence of multiple communication systems, which limit capacity and quality, and current solutions like 5G high-out-band suppression filters are expensive and ineffective.
Innovation Solution
A communication anti-interference detection method involving demodulation, inverse Fourier transform, convolution, and anti-interference circuit processing to filter out interfering signals, ensuring good radio-frequency performance with low cost and high operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If 5G high-out-band suppression filter is used to filter interfering signals, then anti-interference performance is improved, but cost increases significantly
Solution Approach 1:
The patent extracts and detects interfering signals from the composite signal using correlation detection. By comparing the received signal with a local reference signal, the system identifies and separates interfering components, then removes them through subtraction, achieving anti-interference without expensive hardware filters
Solution Approach 2:
The patent uses a local reference signal that copies the characteristics of the desired signal. By generating this reference signal locally and using it for correlation detection, the system can identify interfering signals and remove them, providing a low-cost alternative to expensive suppression filters
2Measurement precision
If traditional detection methods are used, then system complexity is low, but interference detection capability is insufficient
Solution Approach 1:
The patent implements a feedback mechanism where the detected interfering signal is subtracted from the received signal, and the result is used for further processing. This feedback loop continuously refines the interference cancellation, improving detection precision while managing system complexity through iterative optimization
Data Source
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AI summary
Provided are a communication anti-interference detection method and device. The method includes: demodulating an input radio-frequency signal to acquire a demodulated signal; convolving a first signal and a second signal to acquire a detection signal, so as to detect whether there is an interfering signal in the input radio-frequency signal, wherein the first signal is a signal acquired by performing inverse Fourier transform on the demodulated signal, and the second signal is a signal acquired by performing phase inversion on a preset baseband signal; and performing anti-interference processing on an interfered signal, wherein a signal anti-interference method further includes: after deconvolving the interfering detection signal, performing subtraction or inverse superposition on the detection signal and the first signal, and filtering out the interfering signal to acquire a third signal; and modulating the third signal to acquire an output radio-frequency signal.