Jamming Signal Estimation Through Reference Signal Form-Fitting
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Solution Overview
Problem
Existing RF communication systems face challenges in effectively detecting and mitigating signal interference from jamming signals, which can degrade the quality of wireless communications.
Innovation Solution
The system infers coarse parameters of a jamming signal by form-fitting a reference signal with an input signal to isolate and identify the jamming signal, determining its symbol rate and center frequency, and then performs mitigation operations to reduce its impact on the signal of interest.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal processing operations are performed to detect and mitigate jamming signals, then communication reliability is improved, but processing time and complexity increase
Solution Approach 1:
The system performs preliminary form-fitting of the reference signal to the input signal to pre-identify the structure and parameters of potential jamming signals before full mitigation processing. This preliminary characterization enables faster subsequent mitigation operations by having parameter estimates ready in advance.
Solution Approach 2:
The signal processing is divided into distinct segments: first form-fitting the reference signal to identify jamming parameters, then separately performing mitigation operations. This segmentation allows each stage to be optimized independently and facilitates parallel processing where possible.
2Measurement precision
If form-fitting and parameter estimation operations are performed on the input signal, then jamming signal detection precision is improved, but computational complexity increases
Solution Approach 1:
A form-fitted reference signal is introduced as an intermediary to bridge the input signal and the jamming signal parameters. By fitting the known reference signal structure to the input, the system can extract jamming parameters without directly analyzing the complex composite signal, thereby reducing computational burden.
Solution Approach 2:
The reference signal is copied and adapted through form-fitting to match the characteristics of the input signal's jamming portion. This copied and adjusted reference signal serves as a template for identifying jamming parameters, avoiding the need for complex direct analysis of the unknown jamming signal structure.
3Object-affected harmful factors
If the reference signal is subtracted from the input signal to isolate the jamming signal, then interference mitigation effectiveness is improved, but signal processing time increases
Solution Approach 1:
The jamming signal is extracted from the composite input signal by subtracting the form-fitted reference signal. This extraction isolates the jamming component, enabling targeted mitigation operations that are more efficient than processing the entire composite signal.
Solution Approach 2:
The system changes parameters of the reference signal through form-fitting operations to match the actual jamming signal characteristics. By adjusting amplitude, frequency, and phase parameters of the reference signal to optimize the fit, the subsequent subtraction more effectively isolates the jamming component, reducing the number of iterations needed for convergence.
Data Source
AI summary
Improved techniques for estimating parameters of a jamming signal. An input signal is identified. This input signal is suspected of being a jammed composite signal. Attributes of a reference signal are determined. The reference signal is an expected signal that was expected to be received. A form fitting operation is performed in which the reference signal is formed fitted with the input signal. The reference signal is subtracted from the input signal to generate an isolated output signal. A suspected portion of the isolated output signal is identified. An estimated symbol rate and an estimated center frequency for the jamming signal are determined based on the suspected portion. The estimated symbol rate and the estimated center frequency are used to facilitate a subsequent mitigation operation of eliminating or reducing an impact of the jamming signal against the signal of interest.