Adaptive Waveform Modulation for Satellite Anti-Jamming
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Solution Overview
Problem
Satellite communication systems face significant challenges with interference and jamming due to the complexity and unpredictability of wideband geosynchronous orbit (GEO) SATCOM environments, requiring effective cognitive spectrum management and agile waveform adaptation to ensure reliable data transmission.
Innovation Solution
An anti-jamming method utilizing game reasoning processes to guide frequency hopping in satellite communication systems, where information from space object propagators, SATCOM performance evaluations, and spectrum sensing is used to determine optimal frequency hopping strategies, employing Universal Software Radio Peripheral (USRP) configured with Gnu's not Unix (GNU) Radio for adaptive waveform modulation to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wideband GEO SATCOM systems are deployed to provide high-capacity communications, then communication capacity and coverage are improved, but the system becomes more vulnerable to interference and jamming
Solution Approach 1:
The patent implements dynamic frequency hopping and adaptive waveform modulation that continuously changes transmission parameters based on detected interference conditions. The system transitions from static frequency allocation to dynamic adaptation, allowing the SATCOM system to evade jamming by constantly changing operational characteristics across multiple frequency bands.
Solution Approach 2:
The system changes multiple transmission parameters simultaneously including frequency, modulation type, and waveform characteristics. By varying these parameters dynamically in response to detected jamming, the system maintains communication effectiveness while evading interference, directly addressing the vulnerability of wideband systems.
2Reliability
If cognitive spectrum management and agile waveform adaptation are implemented to counter jamming, then anti-jamming capability is improved, but system complexity increases
Solution Approach 1:
The patent implements a closed-loop system where the transmitter monitors the communication channel for interference, analyzes jamming conditions, and automatically adjusts transmission parameters in response. This feedback mechanism enables adaptive waveform modulation and frequency hopping without manual intervention, improving anti-jamming capability through intelligent response to environmental conditions.
Solution Approach 2:
The SATCOM system performs self-diagnosis and self-adjustment by autonomously detecting interference patterns and modifying its own transmission characteristics. The system serves itself by implementing cognitive spectrum management and waveform adaptation without external control, reducing the need for complex external management infrastructure.
3Object-affected harmful factors
If frequency hopping is used to avoid jamming, then the probability of interference is reduced, but transmission reliability may deteriorate due to frequency transitions
Solution Approach 1:
The system implements periodic frequency hopping at optimized intervals that balance interference avoidance with transmission stability. By carefully controlling the timing and duration of frequency transitions, the system minimizes disruption to ongoing communications while maintaining protection against jamming, ensuring that hops occur at optimal moments in the transmission cycle.
Data Source
AI summary
Various embodiments provide an anti-jamming method in a satellite communication (SATCOM) system. A waveform modulation is performed on a waveform of a source data to provide a modulated waveform transmitted to a transmitter and then to a receiver. The modulated waveform transmitted from the receiver is demodulated to provide a demodulated waveform. In response to interference, a game reasoning process is performed on the demodulated waveform to provide an anti-jamming adaptive waveform. By performing a game-optimal waveform modulation on the anti-jamming adaptive waveform, a frequency hopping process is used to guide the data transmission, such that the source data is transmitted with a minimal probability of being interfered.