Multimode Antenna System for Fast GPS Acquisition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current GPS receiver technologies face challenges in achieving fast and efficient location acquisition, particularly in emergency situations, due to limitations in link budget and startup performance, especially in environments with varying satellite signal strengths.
Innovation Solution
A multimode antenna system that can switch between different radiation patterns to optimize signal reception by selecting the optimal mode based on signal strength and number of satellites, using a combination of a low noise amplifier, CPU, and memory to store and manage various antenna configurations, thereby reducing acquisition time for both 2D and 3D location fixes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a single-mode antenna is used for GPS reception, then the device complexity is low, but the acquisition time is long and link budget is poor
Solution Approach 1:
The patent implements a dynamic antenna system that can switch between different radiation modes (TM110, TM120, TM210) based on real-time signal conditions. The CPU monitors satellite signal strength and automatically selects the optimal antenna mode, transforming a static single-mode antenna into a dynamic multi-mode system that adapts to varying GPS reception conditions, thereby reducing acquisition time without permanently increasing physical complexity
Solution Approach 2:
The patent changes the operational parameters of the antenna by utilizing multiple resonant modes of the same physical structure. By adjusting which resonant mode is active (through switching circuits controlled by the CPU), the antenna's radiation characteristics are dynamically modified to optimize signal reception for different satellite positions and signal strengths, improving acquisition time while maintaining a relatively simple physical antenna structure
2Reliability
If a single-mode antenna is used, then the manufacturing cost is low, but the link budget and signal reception quality are insufficient
Solution Approach 1:
The patent makes a single antenna structure perform multiple functions by enabling it to operate in different resonant modes. The same physical antenna can provide optimal reception for different satellite geometries and signal conditions by switching between TM110, TM120, and TM210 modes, effectively making one antenna component serve multiple reception purposes and improving reliability without proportionally increasing component count
Solution Approach 2:
The system dynamically selects antenna modes based on real-time signal quality assessment. The CPU evaluates received signal strength and automatically switches between antenna modes to maintain optimal reception conditions, transforming a static single-function antenna into a dynamic multi-functional system that adapts to varying signal environments, thereby improving reception reliability
3Productivity
If multiple antenna modes are implemented, then the acquisition time is reduced, but the control system complexity increases
Solution Approach 1:
The patent implements a feedback-controlled antenna switching system where the CPU continuously monitors GPS signal strength and satellite acquisition status. Based on this feedback, the system automatically selects and switches between antenna modes to optimize signal reception. This closed-loop control enables faster acquisition by adapting to real-time conditions, with the complexity justified by the significant improvement in location fix speed and reliability
Solution Approach 2:
The system performs self-optimization by automatically monitoring signal conditions and selecting the appropriate antenna mode without requiring manual intervention. The CPU-based control system autonomously manages the complexity of multi-mode operation, making the system self-adjusting and reducing the need for external control while improving acquisition efficiency
Data Source
AI summary
The instant disclosure concerns an antenna system and method for location-finding of a wireless communication device. A cellular multimode antenna is configured to analyze pilot signals from base station towers across a plurality of antenna modes. Information corresponding to the received signals and each antenna mode is analyzed to determine a location fix. In certain optional embodiments, the location fix determined by the cellular multimode antenna is used to determine an optimal mode for a second GPS modal antenna, such that the selected mode of the GPS modal antenna provides optimum signal quality with the global positioning system. In this regard, the cellular multimode antenna estimates the location of the device, and a mode for the GPS modal antenna is selected based on the location fix such that the GPS antenna is capable of quickly determining a precise position of the device.