Radio Clock GPS Date Acquisition Sensitivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Radio clocks face delays in acquiring date information from GPS satellites due to decreased receiving sensitivity in poor reception environments, leading to prolonged information acquisition times.
Innovation Solution
A radio clock design that maintains synchronization with the GPS satellite that transmitted the time information, using the same local code for correlation, to prevent sensitivity drops and ensure timely acquisition of date information, thereby reducing power consumption and shortening the time to display accurate time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the radio clock receives time information from GPS satellite and then starts to acquire date information, then the time correction can be performed, but the acquisition of date information takes a long period of time due to decreased receiving sensitivity in poor reception environment
Solution Approach 1:
The control unit controls the receiving unit to receive a satellite signal containing date information immediately after receiving time information, before the user may move to a poor reception environment. This preliminary acquisition of date information prevents long acquisition times and ensures timely date correction.
2Reliability
If the radio clock maintains continuous reception to ensure date information acquisition, then receiving sensitivity is maintained, but power consumption increases
Solution Approach 1:
The control unit controls the receiving unit to receive satellite signals at specific intervals (time information every 6 seconds, date information every 30 seconds) rather than continuously. This periodic reception maintains receiving sensitivity while significantly reducing power consumption compared to continuous reception.
Data Source
AI summary
A radio clock including: an antenna configured to receive a satellite signals transmitted from a plurality of GPS satellites; a receiving unit configured to perform a receiving process to acquire information tram a satellite signal received by the antenna, the information being contained in the satellite signal; and a control unit configured to control the receiving unit to keep synchronized with the GPS satellite that has transmitted the satellite signal and control the receiving unit to receive a satellite signal containing date information for date correction when the information acquired by the receiving unit does not contain the date information.