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 prevent interference by detecting oscillation signal characteristics and generating control signals to adjust resonance frequency, transmission signal strength, or transmission frequency, thereby maintaining signal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If positive feedback amplification scheme is used to generate oscillation signal, then signal gain is improved, but injection locking and injection pulling occur causing interference
Solution Approach 1:
The patent implements a feedback mechanism where the receiver detects oscillation signal characteristics and generates control signals that are transmitted back to the transmitter. The transmitter then adjusts its transmission signal characteristics based on this feedback to prevent interference while maintaining the benefits of positive feedback amplification for signal gain.
Solution Approach 2:
The system dynamically changes transmission signal parameters (such as frequency or power level) based on detected oscillation characteristics. By adjusting these parameters in response to real-time conditions, the system prevents injection locking and pulling while maintaining effective signal transmission and gain.
2Reliability
If resonance frequency is adjusted to prevent interference, then signal-to-interference ratio is improved, but system complexity increases
Solution Approach 1:
The system employs self-service mechanisms where the receiver autonomously detects oscillation signal characteristics and generates appropriate control signals. The transmitter then automatically adjusts its parameters based on these control signals, eliminating the need for complex external interference management systems while maintaining high signal-to-interference ratio.
3Object-affected harmful factors
If control signals are transmitted to adjust transmission signal characteristics, then interference prevention is improved, but communication overhead increases
Solution Approach 1:
The system transmits control signals selectively and partially - only when oscillation characteristics indicate potential interference conditions. Rather than continuous control signaling, the system intervenes only when necessary to prevent injection locking or pulling, thereby minimizing communication overhead while maintaining effective interference prevention.
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
Effectively prevents injection locking and injection pulling, ensuring accurate signal detection and improving signal-to-interference ratio by dynamically adjusting resonance and transmission parameters based on real-time interference detection.
Implementation Method 1
The super-regenerative receiver may generate an oscillation signal from a received signal using a positive feedback amplification scheme
Implementation Method 2
a resonance frequency adjusting unit configured to adjust a resonance frequency associated with a filtering band of a transmission signal
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.