Wireless Ranging via Compressed CSI Feedback
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Solution Overview
Problem
Indoor navigation systems face challenges in accurately determining location due to the absence of GNSS signals, leading to inefficiencies in ranging measurements and location estimation, particularly in environments where traditional GPS methods fail.
Innovation Solution
The implementation of a wireless communication system that utilizes compressed Channel State Information (CSI) feedback for ranging measurements, allowing devices to estimate timing values based on channel responses rather than traditional Time of Arrival (ToA) measurements, thereby reducing complexity and increasing accuracy in indoor location determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional Time of Arrival (ToA) measurements are used for indoor ranging, then the system can perform location estimation, but the measurement precision is insufficient and the device complexity is high
Solution Approach 1:
The patent replaces traditional mechanical/electronic ToA measurement systems with a wireless communication-based ranging system that uses compressed CSI feedback. This substitution enables sub-meter accuracy while reducing device complexity by leveraging existing wireless infrastructure and simplified signal processing.
Solution Approach 2:
The patent changes the measurement parameter from traditional ToA to compressed CSI-based timing values. This parameter transformation allows the system to achieve higher precision location estimation while reducing computational complexity through efficient signal processing and compression techniques.
2Device complexity
If compressed CSI feedback is used for ranging measurements, then the device complexity is reduced, but the measurement precision must be maintained
Solution Approach 1:
The patent extracts only the essential timing information from the full CSI data through compression. By taking out and transmitting only the critical timing components via compressed feedback, the system reduces device complexity while preserving the measurement precision needed for accurate ranging.
Solution Approach 2:
The patent implements a feedback mechanism where compressed CSI information is transmitted back through the wireless channel. This feedback loop enables the receiving device to reconstruct accurate timing values and calculate precise distances, maintaining measurement precision while reducing overall system complexity.
Data Source
AI summary
Some demonstrative embodiments include apparatuses systems and/or methods of ranging measurement. For example, an apparatus may include circuitry and logic configured to cause a first wireless communication station (STA) to receive from a second STA a sounding transmission for a range measurement of a range between the first STA and the second STA; to determine a channel response estimation based on the sounding transmission from the second STA; to determine a timing value based on the channel response estimation; and to transmit a feedback message to the second STA, the feedback message including the timing value.