Pi and the AGM: a study in the analytic number theory and computational complexity
Pi and the AGM: a study in the analytic number theory and computational complexity
802.11 Wireless Networks: The Definitive Guide
802.11 Wireless Networks: The Definitive Guide
Location-based Services: Fundamentals and Operation
Location-based Services: Fundamentals and Operation
Sensor Measurements for Wi-Fi Location with Emphasis on Time-of-Arrival Ranging
IEEE Transactions on Mobile Computing
Relative location estimation in wireless sensor networks
IEEE Transactions on Signal Processing
Least squares algorithms for time-of-arrival-based mobile location
IEEE Transactions on Signal Processing
A survey of indoor positioning systems for wireless personal networks
IEEE Communications Surveys & Tutorials
Nonline-of-sight error mitigation in mobile location
IEEE Transactions on Wireless Communications
Survey of Wireless Indoor Positioning Techniques and Systems
IEEE Transactions on Systems, Man, and Cybernetics, Part C: Applications and Reviews
Indoor geolocation science and technology
IEEE Communications Magazine
From RSSI to CSI: Indoor localization via channel response
ACM Computing Surveys (CSUR)
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The presence of (Non line of Sight) NLOS propagation paths has been considered the main drawback for localization schemes to estimate the position of a (Mobile User) MU in an indoor environment. This paper presents a comprehensive wireless localization system based on (Round-Trip Time) RTT measurements in an unmodified IEEE 802.11 wireless network. It overcomes the NLOS impairment by implementing the (Prior NLOS Measurements Correction) PNMC technique. At first, the RTT measurements are performed with a novel electronic circuit avoiding the need for time synchronization between wireless nodes. At second, the distance between the MU and each reference device is estimated by using a simple linear regression function that best relates the RTT to the distance in (Line of Sight) LOS. Assuming that LOS in an indoor environment is a simplification of reality hence, the PNMC technique is applied to correct the NLOS effect. At third, assuming known the position of the reference devices, a multilateration technique is implemented to obtain the MU position. Finally, the localization system coupled with measurements demonstrates that the system outperforms the conventional time-based indoor localization schemes without using any tracking technique such as Kalman filters or Bayesian methods.