Jammer Signal Detection and Localization Method for Model Flight Safety
In recent years, with the rapid development of drones, model airplanes and other civil aircraft, the threat of jamming against their flight safety has become increasingly serious, and jammer may cause the aircraft to crash out of control by transmitting jamming signals, resulting in casualties and property losses. Therefore, timely and effective detection and localization of Jammer signals are essential to ensure the flight safety of model aircrafts.
Characterization of Jammer signals
Analyze the frequency, bandwidth, power and modulation of different types of signal blocker device signals to establish a Jammer signal feature library, which lays the foundation for detection and identification.
Energy monitoring and frequency sweep detection
Deploying energy monitoring and frequency sweeping detectors in the operating frequency band of the aircraft to continuously monitor the spectral environment, and once abnormal energy signs are detected, the signal capture judgment and analysis will be triggered.
Time-frequency domain feature extraction and matching
Pre-process the captured abnormal signals, extract their time-frequency domain feature parameters, and match them with Jammer signal feature library to identify whether they belong to 5G jammer signals or not.
Heading/ranging/frequency system
For the Jammer signal, configure the position detection subsystems such as heading solving system, ranging system, frequency measurement system, etc., to realize the positioning of the Jammer transmitter.
Navigation/radar signal assisted localization
Combined with the vehicle's own navigation system, radar information and other data, the position of the Jammer launch source is composite solved to improve the positioning accuracy.
Multi-point station cooperative network localization
Deploying multiple decentralized monitoring stations to perform cross-station location network positioning through time/frequency difference measurements and signal arrival angle measurements.
Coordinate data upload and indication
Upload the precise coordinates of the audio recording jammer transmitting source to the command terminal via wireless link, and visually indicate the Jammer signal source location on the electronic map.
Quick Avoidance and Suppression Strategy
After receiving the Jammer coordinates, the aircraft will quickly avoid the jamming source according to the preset strategy, or cooperate with ground units to suppress the jamming source.
Jammer signal detection and localization is a highly automated and networked process, which requires strong algorithmic support and system engineering capability. Among them, bluetooth scrambler signal modeling and feature parameter extraction are especially critical. With the development of miniaturization and low-power technology, this capability can be integrated into the vehicle to form an autonomous anti-jamming protection system. It is of great significance to protect the safety of unmanned aerial vehicles such as aeromodels.
