Altitude Sensor Jamming Suppression via Adaptive Algorithm Selection
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Solution Overview
Problem
Altitude measuring sensors face errors due to jamming phenomena caused by ambient RF signals, which conventional frequency hopping schemes struggle to effectively mitigate when extra frequency bands for hopping are limited.
Innovation Solution
A jamming suppression apparatus and method that includes a signal unit for transmitting and receiving RF signals, and a processing unit to determine jamming occurrence and apply various jamming suppression algorithms, such as time domain control, transmission and reception gain control, and frequency hopping, to enhance accuracy and efficiency of altitude measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping scheme is used to avoid jamming, then jamming avoidance is improved, but when extra frequency bands are limited, the frequency band to hop overlaps with jamming frequency band, resulting in failure of jamming avoidance
Solution Approach 1:
The patent changes the parameter of frequency band selection dynamically. Instead of using a fixed frequency hopping scheme, the system adaptively selects frequency bands based on real-time jamming detection and altitude information, switching between different frequency bands (e.g., X-band, C-band, L-band) to avoid jamming while ensuring measurement continuity
Solution Approach 2:
The system transitions from a static frequency hopping approach to a dynamic multi-band selection strategy. The frequency band selection is dynamically adjusted based on detected jamming conditions and current altitude, allowing the system to adapt to changing environmental conditions and maintain reliable altitude measurement despite limited frequency band availability
2Reliability
If multiple jamming suppression algorithms are applied, then jamming suppression effectiveness is improved, but system complexity increases
Solution Approach 1:
The patent segments the jamming suppression process into distinct functional modules: jamming detection unit, altitude determination unit, frequency band selection unit, and signal processing unit. Each module performs a specific function, and multiple suppression algorithms (e.g., notch filtering, adaptive filtering, frequency hopping) are applied in different modules based on detected jamming conditions, making the complex system manageable and maintainable
Solution Approach 2:
The system performs preliminary jamming detection and analysis before applying suppression algorithms. By detecting jamming characteristics (frequency, power, duration) in advance and determining current altitude, the system pre-selects appropriate suppression algorithms and frequency bands, reducing the complexity of real-time decision-making and improving suppression effectiveness
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively suppresses jamming, ensuring accurate altitude tracking by selectively applying appropriate jamming suppression algorithms based on detected noise signals and altitude sections, thereby improving the reliability of altitude measurements.
Implementation Method 1
The altitude measuring sensor is equipment transmitting electromagnetic waves to the outside, receiving electromagnetic waves (e.g., a reflected wave reflected from the surface of the earth) from the outside
Implementation Method 2
A phenomenon in which a signal system (or a communication system) creates confusion or is interfered due to radio interference or radio disturbance is called a jamming phenomenon
Data Source
AI summary
Provided are an apparatus for minimizing occurrence of an error in measuring an altitude, and a method thereof. A jamming suppression apparatus of an altitude measuring sensor includes a signal unit configured to transmit a radio frequency (RF) signal to the outside or receive an RF signal from the outside, and a processing unit configured to determine whether jamming has occurred on the basis of a noise signal received from the signal unit, and suppress jamming by performing at least one of a plurality of jamming suppression algorithms sequentially or simultaneously on the basis of a current altitude when jamming has occurred according to the determination result.