Satellite Signal Reception Timing for Low-Peak Search and Tracking
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Solution Overview
Problem
Existing satellite signal reception devices face challenges in reducing peak power consumption while simultaneously performing search and tracking processing, leading to increased power consumption and potential signal loss during device movement.
Innovation Solution
A satellite signal reception device with a control unit that alternates the operation of the reception unit and correlation computation processing unit in specific time intervals to perform search and tracking processing, using a storage unit to store reception signals and compute correlation values, thereby reducing peak power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If time-divisional driving is used to suppress peak power, then power consumption is reduced, but both search processing and tracking processing cannot be achieved simultaneously
Solution Approach 1:
The patent segments the signal processing into two distinct units: a reception unit for receiving satellite signals and a baseband processing unit for processing the received signals. By dividing the processing functions and applying time-divisional driving to these segmented units, the system can suppress peak power consumption while maintaining the capability to perform both search and tracking processing through coordinated operation of the segmented components.
Solution Approach 2:
The patent implements periodic action by time-divisionally driving the reception unit and baseband processing unit. The reception unit operates during specific time periods to capture satellite signals, then stops while the baseband processing unit processes the stored signals. This periodic alternation between reception and processing phases enables peak power suppression while ensuring both search and tracking functions are performed through the coordinated periodic cycles.
2Use of energy by moving object
If tracking processing is performed without search processing, then power consumption is reduced, but satellite signal may be lost during device movement
Solution Approach 1:
The patent segments the processing functions into reception unit operations and baseband processing unit operations. The baseband processing unit is further segmented to perform both search processing and tracking processing on stored reception signals. This segmentation allows the system to execute search and tracking in sequential phases during different time periods, ensuring signal acquisition reliability during device movement while maintaining reduced power consumption through time-divisional operation.
Solution Approach 2:
The patent applies preliminary action by having the reception unit store reception signals in advance in a storage unit before baseband processing occurs. This preliminary storage of signals allows subsequent search and tracking processing to be performed on the stored data without requiring continuous reception unit operation, thereby ensuring reliable signal acquisition even during device movement while keeping power consumption low during the processing phases.
3Reliability
If search processing is performed while tracking processing is ongoing, then signal acquisition capability is maintained, but peak power consumption increases
Solution Approach 1:
The patent segments the overall processing into distinct reception phases and baseband processing phases. During reception phases, the reception unit captures and stores satellite signals. During baseband processing phases, both search processing and tracking processing are performed on the stored signals. This temporal segmentation of functions allows simultaneous execution of search and tracking operations during processing phases without requiring simultaneous operation of high-power reception and processing units, thus maintaining signal acquisition capability while suppressing peak power consumption.
Solution Approach 2:
The patent implements periodic alternation between reception periods and baseband processing periods. During reception periods, signals are captured and stored. During subsequent processing periods, both search and tracking processing are performed on the stored signals. This periodic structure enables the system to execute multiple processing functions including both search and tracking during dedicated processing phases, ensuring signal acquisition capability is maintained through systematic periodic operation while avoiding the peak power consumption that would result from simultaneous continuous reception and processing.
Data Source
AI summary
A baseband control unit operates a reception unit and stores a reception signal in a sampling memory unit, and then stops an operation of the reception unit and causes a correlation computation processing unit to compute a correlation value for searching for a position information satellite based on the stored reception data. The baseband control unit operates the reception unit and stores the reception data in a bank 0 in a part of a first period of periods continuous in order at time intervals of 20 ms, and stops the reception unit and causes the correlation computation processing unit to compute a correlation value for searching for and tracking the position information satellite based on the reception data stored in the bank 0 in a remaining period of 1 ms.