Super-Regenerative Receiver Feedback Against Injection Locking
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Solution Overview
Problem
Super-regenerative communication systems face interference issues due to injection locking and injection pulling, which affect the resonance frequency and signal detection, leading to incorrect signal processing and reduced signal-to-interference ratio.
Innovation Solution
A super-regenerative receiver and transmitter system that adjusts resonance frequency and transmission signal characteristics to mitigate interference by detecting oscillation signal characteristics and generating control signals to adjust resonance frequency, transmission signal strength, or transmission frequency, thereby preventing injection locking and injection pulling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If positive feedback amplification is used to generate oscillation signal, then signal gain is improved, but interference susceptibility increases
Solution Approach 1:
The patent implements a feedback mechanism where the receiver detects oscillation signal characteristics and generates control signals to adjust transmission signal characteristics. This closed-loop feedback system monitors the oscillation signal for signs of injection locking or pulling and dynamically adjusts transmission parameters to prevent interference, thereby maintaining high signal gain while reducing interference susceptibility
Solution Approach 2:
The system dynamically changes transmission signal parameters (frequency, power, or both) based on detected oscillation characteristics. When interference is detected through oscillation signal analysis, the transmitter adjusts its operating parameters to move away from problematic states, allowing the system to maintain optimal signal gain while avoiding interference conditions
2Measurement precision
If resonance frequency is adjusted to prevent injection locking, then signal detection accuracy is improved, but system complexity increases
Solution Approach 1:
The receiver performs self-diagnosis by detecting its own oscillation signal characteristics and automatically generating control signals to adjust transmission parameters. This self-service mechanism eliminates the need for complex external monitoring systems while maintaining accurate signal detection, as the system uses its inherent oscillation behavior as the detection basis
Solution Approach 2:
The oscillation signal serves multiple functions: it is both the operational signal for communication and the diagnostic signal for detecting interference conditions. By utilizing the same oscillation signal for both communication and monitoring purposes, the system avoids adding separate complex detection hardware while improving signal detection accuracy
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 system effectively prevents interference by adjusting resonance frequency and transmission signal characteristics, ensuring accurate signal detection and improving signal-to-interference ratio, thereby maintaining communication integrity.
Implementation Method 1
The oscillation signal generating unit is configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal
Implementation Method 2
a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter
Data Source
AI summary
A receiver and a transmitter that copes with interference in a super-regenerative communication system, and a method of using the receiver and the transmitter, are provided. A super-regenerative receiver includes a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal that is received from a transmitter. The super-regenerative receiver further includes an oscillation signal generating unit configured to generate an oscillation signal, using a positive feedback amplification, based on the resonance frequency and the transmission signal. The super-regenerative receiver further includes an oscillation characteristic detecting unit configured to detect a characteristic of the oscillation signal. The super-regenerative receiver further includes a determining unit configured to determine whether interference is included in the transmission signal based on the characteristic of the oscillation signal and the resonance frequency.