Dual-Oscillator Receiver for Faster Radio Frequency Scanning
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Solution Overview
Problem
Existing receiver designs are too slow in scanning a range of radio transmission frequencies due to the time required to retune the oscillator for subsequent frequency monitoring.
Innovation Solution
A receiver design utilizing two oscillators and a controller to rapidly switch between frequencies, where one oscillator is used to determine if a frequency is in use while the other is tuned to the next frequency, reducing retuning delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single oscillator is used to monitor radio frequencies, then the device complexity is reduced, but the scanning speed becomes too slow to meet real-time monitoring requirements
Solution Approach 1:
The receiver is divided into multiple oscillators (first oscillator and second oscillator) that operate independently. Each oscillator is assigned to monitor specific frequency ranges, allowing parallel frequency scanning. This segmentation enables the system to scan multiple frequencies simultaneously, dramatically increasing scanning speed while maintaining manageable device complexity through modular architecture.
Solution Approach 2:
The patent transitions from a single-dimensional sequential scanning approach to a multi-dimensional parallel scanning approach by introducing multiple oscillators. The first oscillator monitors while the second oscillator prepares for the next frequency, creating a temporal and functional dimension that eliminates the retuning bottleneck and achieves real-time monitoring capability.
2Speed
If the oscillator is retuned quickly to scan frequencies, then the scanning speed improves, but the time required to capture and analyze signals at each frequency is reduced
Solution Approach 1:
The second oscillator is tuned to the next frequency in advance during the capture time period of the first oscillator. This preliminary action ensures that when the first oscillator completes its signal capture and analysis, the second oscillator is already ready to immediately begin monitoring the next frequency, eliminating any idle time and maintaining continuous scanning operation.
Solution Approach 2:
The patent ensures continuous useful action by overlapping the tuning time period of one oscillator with the capture time period of another. While the first oscillator is capturing signals, the second oscillator is simultaneously being tuned to the next frequency, ensuring that the scanning process never stops and every moment is productively utilized for frequency monitoring.
Data Source
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AI summary
A receiver and associated methods are described. The receiver comprises a first oscillator (14), a second oscillator (16), a controller (18) operable to control frequencies to which the first and second oscillators are tuned, and a discrimination circuit (24) operable to receive and monitor transmitted signals; wherein the discrimination circuit is configured to receive a signal at a first transmission frequency determined based on a first tuned frequency to which the first oscillator is tuned, and to determine, in a capture time period, whether data is being transmitted at the first transmission frequency; wherein the controller is configured to tune, in a tuning time period, the second oscillator to a second tuned frequency; and wherein the tuning time period is shorter than the capture time period.