Abrupt Jamming Mitigation via Signal-to-Total-Power Ratio Comparison
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Solution Overview
Problem
Existing communication systems face challenges in accurately responding to abrupt jamming due to inaccurate signal-to-noise ratio estimates, leading to delayed and ineffective countermeasures in frequency-agile systems.
Innovation Solution
A method is implemented at the remote receiver node to compute and provide a jammed signal-to-noise ratio by comparing signal-to-total-power ratios with and without jamming, allowing the local transmitter node to adjust its transmission power and frequency accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional signal-to-noise ratio estimation is used during abrupt jamming, then the estimation process continues without interruption, but the accuracy of the signal-to-noise ratio estimate deteriorates significantly
Solution Approach 1:
The system pre-calculates and stores signal-to-total-power ratios under assumed jamming conditions before actual jamming occurs. When abrupt jamming is detected, these pre-computed values are immediately available for comparison, eliminating the need to perform calculations during the jamming event itself and ensuring continuous accurate estimation.
Solution Approach 2:
The patent introduces signal-to-total-power ratio as an intermediary measurement that can be accurately computed even during jamming. This intermediary metric serves as a bridge to infer the actual signal-to-noise ratio by comparing it against pre-computed jamming-condition values, thereby maintaining estimation accuracy during adverse conditions.
2Adaptability or versatility
If power and rate control is used to respond to jamming, then the transmitter can adjust transmission parameters, but the response becomes slow and sometimes non-responsive when jamming is abrupt and strong
Solution Approach 1:
The system pre-computes signal-to-total-power ratios assuming jamming conditions before actual jamming occurs. This preliminary preparation enables immediate detection and response to abrupt jamming by simply comparing current measurements against pre-computed values, eliminating calculation delays during the jamming event.
Solution Approach 2:
The patent implements a feedback mechanism where the receiver continuously monitors signal-to-total-power ratios and compares them against pre-computed jamming-condition ratios. When a significant deviation is detected, the system immediately triggers a jamming response at the transmitter, creating a rapid closed-loop control system that responds in real-time to jamming conditions.
3Ease of operation
If spectral data and signal-to-noise ratio measurements are made independently, then each measurement can be performed separately, but the feedback provided to the transmitter becomes incorrect when jamming occurs
Solution Approach 1:
The patent merges the spectral measurement and signal-to-noise ratio estimation processes by computing signal-to-total-power ratios that incorporate both spectral information and power measurements. This unified approach ensures that both measurements are consistently aligned and mutually supportive, even during abrupt jamming conditions.
Solution Approach 2:
The signal-to-total-power ratio serves as an intermediary that connects spectral data and signal-to-noise ratio measurements. By computing this intermediary metric under assumed jamming conditions and comparing it with actual measurements, the system ensures that both spectral and signal-to-noise ratio information remain correlated and accurate even during jamming events.
Data Source
AI summary
Providing signal-to-noise ratio information to a local transmitter node. A method includes receiving data in a signal transmitted on a data channel from the local transmitter node. A first signal-to-total-power ratio for the signal assuming no jamming of the signal is occurring is computed. A second signal-to-total-power ratio for the signal with factors included assuming jamming is occurring is computed. The first signal-to-total-power ratio to the second signal-to-total-power ratio are compared to determine if they differ by a predetermined amount. The method includes determining that the predetermined amount is exceeded, and as a result, a jammed signal-to-noise ratio is computed assuming jamming is occurring. The jammed signal-to-noise ratio is sent to the local transmitter node to allow the local transmitter to respond to the jammed signal-to-noise ratio.