Terminal Positioning Using Channel State Information Trajectories
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional radio locating technologies for mobile terminals, such as satellite systems, face challenges in achieving precise location when signals are blocked or disturbed, and single-base station environments limit accurate positioning to rough estimates.
Innovation Solution
A method and apparatus that utilize speed information, channel state information, and inertial device data to determine initial locating positions, calculate trajectories, and combine theoretical and actual channel state information to refine the target location, overcoming signal interference and multi-path effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite locating system is used, then locating function can be provided, but precise locating cannot be achieved when signals are blocked or disturbed
Solution Approach 1:
The patent introduces channel state information as an intermediary parameter to bridge the terminal and base station for location determination. Instead of directly relying on satellite signals that may be blocked, the system uses the channel state information of the communication signal between terminal and base station to infer location, thereby maintaining reliability in signal-blocked environments while achieving precise locating through multiple candidate position comparison
Solution Approach 2:
The patent replaces the traditional satellite-based mechanical locating system with a communication-based locating approach. By substituting satellite signal measurement with channel state information measurement in the communication signal between terminal and base station, the system achieves locating functionality that is not affected by satellite signal blockage, thereby improving reliability while maintaining precision through algorithmic comparison of multiple candidate positions
2Ease of operation
If single base station is used for locating, then communication can be maintained, but only rough locating within coverage range can be achieved
Solution Approach 1:
The patent segments the base station coverage area into multiple candidate locating positions. Instead of treating the entire coverage area as a single location estimate, the system divides it into discrete candidate points and uses channel state information to evaluate and compare them, thereby transforming rough coverage-range locating into precise location determination even with a single base station
Solution Approach 2:
The patent adds the dimension of channel state information to the traditional single-base-station locating approach. By incorporating CSI measurements and comparing them against pre-stored reference CSI data for multiple candidate positions, the system transforms a two-dimensional coverage area problem into a multi-dimensional comparison problem, enabling precise location identification through matching CSI patterns across different candidate positions
Data Source
AI summary
Provided is a method for locating a terminal. The method includes: reading speed information; determining a plurality of initial locating positions in a region to be located, and respectively obtaining a trajectory corresponding to each initial locating position of the plurality of initial locating positions by calculating according to the speed information; acquiring a position of a base station, and obtaining theoretical channel state information of trajectory points in the trajectory corresponding to each initial locating position by calculating according to the position of the base station; acquiring actual channel state information of the trajectory points in the trajectory corresponding to each initial locating position; and determining a target locating position from the plurality of initial locating positions according to the theoretical channel state information and the actual channel state information.