A hybrid TDoA-ToA localization method

Gholoobi, Amin; Stavrou, Stavros

doi:10.1109/ictel.2013.6632087

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…According to their work, it is possible to achieve sub-meter accuracy using OWPT. The idea of using the beacon timestamp and MAC timestamp was also discussed by Gholoobi and Stavrou [61]. Their method utilized a beacon timestamp (TOT at AP) for synchronization and a MAC timestamp (TOA at MD) for localization.…”

Section: Mac Layer and Driver Software Methodsmentioning

confidence: 99%

Survey of WiFi positioning using time-based techniques

et al. 2015

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Estimating the position of mobile devices with high accuracy in indoor environments is of interest across a wide range of applications. Many methods and technologies have been proposed to solve the problem but, to date, there is no "silver bullet". This paper surveys research conducted on indoor positioning using time-based approaches in conjunction with the IEEE 802.11 Wireless Local Area Network standard (WiFi). Location solutions using this approach are particularly attractive due to the wide deployment of WiFi and because prior mapping is not needed. This paper provides an overview of the IEEE 802.11 standards and summarizes the key research challenges in 802.11 time-based positioning. The paper categorizes and describes the many proposals published to date, evaluating their implementation complexity and positioning accuracy. Finally, the paper summarizes the state-of-the-art and makes suggestions for future research directions.

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Section: Mac Layer and Driver Software Methodsmentioning

confidence: 99%

Survey of WiFi positioning using time-based techniques

et al. 2015

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3D WLS hybrid and non hybrid localization using TOA, TDOA, azimuth and elevation

Halima

Boujemâa

2018

Telecommun Syst

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Indoor Smartphone Localization: A Hybrid WiFi RTT-RSS Ranging Approach

et al. 2019

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Real-time locating and tracking Technology plays a significant role in location-based IoT applications. With the extensive installation of WiFi access points, the WiFi based indoor positioning approach has become one of the most widely used location technologies. However, due to the limitations of wireless signals, the classic WiFi-based method has become labor-intensive. Recently, the WiFi-based twoway ranging approach was introduced into the 802.11-REVmc2 protocol, which is built on a new packet type known as fine timing measurement (FTM) frame. In this work, we introduce the round-trip time measurement with clock skew and analyze the distribution of the round trip time (RTT) ranging error. A calibration method is presented to eliminate the RTT range offset at the transmitter end. We also develop an integrated ranging algorithm based on the WiFi round trip time range and received signal strength to enhance the scalability and robustness of the positioning system. The experimental results demonstrate that the proposed fusion method achieves remarkable improvement in scalability and precision in both static and dynamic tests, including outdoor and indoor environments. Compared with the classic fingerprinting approach, the performance of the system is remarkably improved, and achieves an average positioning accuracy of 1.435 m with an update rate of every 0.19 s. INDEX TERMSIndoor localization, smartphone, WiFi fine time measurement (FTMs), round trip time (RTT), received signal strength (RSS), Kalman filter.

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A hybrid TDoA-ToA localization method

Cited by 7 publications

References 9 publications

Survey of WiFi positioning using time-based techniques

Survey of WiFi positioning using time-based techniques

3D WLS hybrid and non hybrid localization using TOA, TDOA, azimuth and elevation

Indoor Smartphone Localization: A Hybrid WiFi RTT-RSS Ranging Approach

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