Broadcasting Receiver Frequency Drift Correction
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Solution Overview
Problem
Broadcasting receivers experience deteriorated receiver sensitivity due to frequency drifts and oscillation errors caused by signal distortion and noise during transmission, particularly affecting the low noise block down converter and tuner.
Innovation Solution
A broadcasting receiver system that includes a low noise block down converter, a tuner, and a frequency drift detector to amplify and tune signals, detect frequency drifts, and correct oscillation frequencies, thereby improving receiver sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency drifts occur during signal transmission, then receiver sensitivity deteriorates, but adding frequency detection and correction mechanisms increases device complexity
Solution Approach 1:
The frequency drift detector proactively monitors frequency drifts before they significantly impact receiver sensitivity. By detecting drifts in advance and triggering correction mechanisms, the system prevents sensitivity deterioration rather than reacting after damage occurs, thus improving reliability without requiring overly complex real-time correction systems
Solution Approach 2:
The system implements a feedback loop where the frequency drift detector continuously monitors frequency deviations and feeds this information back to the tuner and low noise block down converter. This closed-loop feedback enables automatic frequency correction, maintaining receiver sensitivity without requiring complex manual intervention systems
2Reliability
If frequency drifts are detected and oscillation frequencies are corrected, then receiver sensitivity improves, but the operating time increases due to additional tuning steps
Solution Approach 1:
The frequency drift detection and correction process operates periodically rather than continuously. The system performs frequency drift detection at scheduled intervals and only initiates correction when drifts are detected, rather than constantly adjusting frequencies. This periodic operation maintains receiver sensitivity while minimizing additional operating time
Solution Approach 2:
The frequency correction system is designed to operate autonomously without requiring external intervention. Once frequency drifts are detected, the system automatically adjusts the oscillation frequencies of the tuner and low noise block down converter, eliminating the need for manual tuning and reducing the time penalty associated with frequency correction
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 corrects frequency drifts and improves receiver sensitivity by adjusting the oscillation frequencies of the low noise block down converter and tuner, ensuring stable signal reception across multiple channels.
Implementation Method 1
The low noise block down converter outputs a signal by amplifying a received signal
Implementation Method 2
a low noise block down converter outputting a signal by amplifying a received signal
Implementation Method 3
The tuner converts the input high frequency signals to signals having a predetermined intermediate frequency
Implementation Method 4
a frequency drift detector detecting frequency drifts of the broadcasting channels tuned by the tuner, and correcting oscillation frequencies
Implementation Method 5
correcting oscillation frequencies of at least one of the low noise block down converter and the tuner
Data Source
AI summary
Disclosed is a broadcasting receiver. The broadcasting receiver comprises a low noise block down converter outputting a signal by amplifying a received signal, a tuner tuning a plurality of broadcasting channels based on the signals output from the low noise block down converter, and a frequency drift detector detecting frequency drifts of the broadcasting channels tuned by the tuner, and correcting oscillation frequencies of at least one of the low noise block down converter and the tuner.