18486906. WI-FI BASED FINE RANGING USING CARRIER PHASE INFORMATION simplified abstract (SAMSUNG ELECTRONICS CO., LTD.)
Contents
WI-FI BASED FINE RANGING USING CARRIER PHASE INFORMATION
Organization Name
Inventor(s)
Vishnu Vardhan Ratnam of Plano TX (US)
Abhishek Sehgal of Frisco TX (US)
Boon Loong Ng of Plano TX (US)
Jianzhong Zhang of Dallas TX (US)
WI-FI BASED FINE RANGING USING CARRIER PHASE INFORMATION - A simplified explanation of the abstract
This abstract first appeared for US patent application 18486906 titled 'WI-FI BASED FINE RANGING USING CARRIER PHASE INFORMATION
The method described in the patent application involves using Wi-Fi channel state information (CSI) parameters to estimate round trip time (RTT) and determine the range between an anchor and a target device.
- Obtaining CSI parameters such as frame transmission and reception times, carrier phase, crystal offset factor, and packet detection time error from Wi-Fi frames.
- Calculating RTT estimate or relative change in RTT estimate based on CSI parameters.
- Estimating range between anchor and target device using RTT estimate, or change in range using relative change in RTT estimate.
Potential Applications: - Indoor positioning systems - Asset tracking - Location-based services - Robotics and autonomous navigation - Virtual and augmented reality applications
Problems Solved: - Improving accuracy of distance estimation in Wi-Fi-based systems - Enhancing localization capabilities in indoor environments - Optimizing performance of location-aware applications
Benefits: - Increased precision in determining device location - Enhanced user experience in location-based services - Improved efficiency in asset tracking and management
Commercial Applications: Title: "Enhancing Indoor Positioning Systems with Wi-Fi CSI Parameters" This technology can be utilized in industries such as retail, logistics, smart homes, and healthcare for precise location tracking, personalized services, and efficient resource management.
Prior Art: Readers interested in exploring prior art related to Wi-Fi-based distance estimation and indoor positioning systems can refer to research papers, patents, and academic publications in the field of wireless communications and localization technologies.
Frequently Updated Research: Researchers are continuously exploring new algorithms and techniques to improve the accuracy and efficiency of Wi-Fi-based localization systems. Stay updated on the latest advancements in this area to leverage cutting-edge technologies for various applications.
Questions about Wi-Fi CSI Parameters for Distance Estimation: 1. How do Wi-Fi CSI parameters contribute to improving distance estimation accuracy in indoor environments?
- Wi-Fi CSI parameters provide valuable insights into the wireless channel characteristics, allowing for more precise calculation of distances between devices.
2. What are the key challenges associated with using Wi-Fi CSI parameters for range estimation, and how can they be addressed?
- Challenges may include signal interference, multipath effects, and environmental factors impacting CSI measurements. Advanced signal processing techniques and algorithms can help mitigate these challenges for more reliable distance estimation.
Original Abstract Submitted
A method includes obtaining Wi-Fi channel state information (CSI) parameters measured at an anchor and a target device from Wi-Fi frames transmitted between the anchor and the target device, the CSI parameters comprising, for each of the anchor and the target device, frame transmission and reception times, a carrier phase of the CSI, a crystal offset factor, and a packet detection time error. The method also includes determining a round trip time (RTT) estimate or a relative change in the RTT estimate as a function of the CSI parameters. The method further includes estimating a range between the anchor and the target device as a function of the RTT estimate, or estimating a change in the range between the anchor and the target device as a function of the relative change in the RTT estimate.
