Ultra Low Power GNSS Receiver Independent Power Control
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Solution Overview
Problem
Conventional GPS receivers continuously operate, consuming excessive power and resources, as they must constantly receive and process satellite signals to maintain location and time data, leading to inefficiencies and potential sub-optimal performance.
Innovation Solution
The development of an ultra-low power GNSS receiver apparatus that independently powers data collection and processing blocks, allowing for periodic activation and deactivation to conserve energy, using a digital baseband pre-processor and control logic to manage power states, enabling operation in different modes, including an offline mode where only necessary components are active.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional GPS receivers continuously receive and process satellite signals, then location and time data accuracy is maintained, but power consumption increases excessively
Solution Approach 1:
The patent implements periodic action by enabling the GPS receiver to operate in discrete cycles rather than continuously. The system periodically wakes up to collect satellite signals, processes the data, and then enters sleep mode. This is achieved through a control mechanism that schedules reception windows and processes stored signals, allowing the receiver to maintain positioning accuracy while dramatically reducing power consumption during idle periods.
Solution Approach 2:
The patent applies preliminary action by pre-collecting and storing satellite signals in memory before full processing is required. The receiver captures and stores raw satellite signals during reception windows, then processes these pre-captured signals later when powered on. This allows the system to separate signal acquisition from signal processing, enabling power savings by not having both functions active simultaneously.
2Measurement precision
If GPS receivers continuously update solutions, then positioning accuracy is maintained, but device complexity and resource consumption increase
Solution Approach 1:
The patent applies segmentation by dividing the GPS receiver into functionally independent modules: a signal collection module that captures satellite signals, a memory module that stores the signals, and a processing module that computes positioning solutions. This segmentation allows each module to be independently controlled and powered, reducing overall system complexity while maintaining positioning accuracy through coordinated operation of the separate components.
3Use of energy by moving object
If independent power control of data collection and processing blocks is implemented, then power consumption is reduced, but control complexity increases
Solution Approach 1:
The patent implements dynamics by making the power states of different receiver blocks adjustable and controllable rather than fixed. The system dynamically transitions blocks between active and sleep states based on operational requirements. A control mechanism monitors system state and adjusts power distribution to individual blocks (such as the collector and processor) to optimize power consumption while maintaining functionality when needed.
Data Source
AI summary
Apparatuses, methods, and other embodiments associated with low power GNSS receiver operation are described. According to one embodiment, an apparatus includes a pre-processor configured to generate digitized signals from satellite signals according to a set of pre-processing functions. The satellite signals are navigation satellite signals. The pre-processor is configured to store the digitized signals in a memory. The apparatus includes a processor configured to produce a navigation result from the digitized signals stored in the memory. The apparatus includes a control logic configured to independently power the digital pre-processor and the processing logic by powering either the digital or the processor at a time.