Results 11 to 20 of about 2,647 (173)

Range-Based Localization for UWB Sensor Networks in Realistic Environments

EURASIP Journal on Wireless Communications and Networking, 2010
The Non-Line of Sight (NLOS) problem is the major drawback for accurate localization within Ultra-Wideband (UWB) sensor networks. In this article, a comprehensive overview of the existing methods for localization in distributed UWB sensor networks under ...
Reiner S. Thomä, Ole Hirsch, Rudolf Zetik, Guowei Shen   +3 more
doaj   +2 more sources

The Impact of Vertical Salinity Gradient on Non-Line-of-Sight Underwater Optical Wireless Communication

IEEE Photonics Journal, 2021
The non-line-of-sight (NLOS) underwater communication can offer a viable route in signal propagation and coverage, thus mitigating the pointing, acquisition, and tracking difficulties in line-of-sight optical communication. However, implementing the NLOS
Mohammed Sait, Yujian Guo, Omar Alkhazragi, Meiwei Kong, Tien Khee Ng, Boon S. Ooi   +5 more
doaj   +1 more source

Localization and dynamic link detection for geographic routing in non-line-of-sight (NLOS) environments [PDF]

EURASIP Journal on Wireless Communications and Networking, 2011
Abstract IEEE 802.15.4a networks can provide the geographic routing solution with high location accuracy for the indoor environments. However, in the non-line-of-sight (NLOS) environments, the IEEE 802.15.4a networks may have a large scale location error and an unstable communication link. In this article, we propose a location estimation and
Park Gwitae, Kong Youngbae, Kwon Younggoo, Shin Jongho   +3 more
openaire   +2 more sources

A Wi-Fi FTM-Based Indoor Positioning Method with LOS/NLOS Identification

Applied Sciences, 2020
In recent years, many new technologies have been used in indoor positioning. In 2016, IEEE 802.11-2016 created a Wi-Fi fine timing measurement (FTM) protocol, making Wi-Fi ranging more robust and accurate, and providing meter-level positioning accuracy ...
Minghao Si, Yunjia Wang, Shenglei Xu, Meng Sun, Hongji Cao   +4 more
doaj   +1 more source

TOA localization for multipath and NLOS environment with virtual stations

EURASIP Journal on Wireless Communications and Networking, 2017
An effective geometrical method which can locate a source based on the time-of-arrival (TOA) measurements and the floor plan information is proposed in simple non-line-of-sight (NLOS) indoor environment where the multiple-bound scattering signal paths ...
Deliang Liu, Ying Wang, Peng He, You Zhai, Hongyun Wang   +4 more
doaj   +1 more source

Mobile Location with NLOS Identification and Mitigation Based on Modified Kalman Filtering

Sensors, 2011
In order to enhance accuracy and reliability of wireless location in the mixed line-of-sight (LOS) and non-line-of-sight (NLOS) environments, a robust mobile location algorithm is presented to track the position of a mobile node (MN).
Wei Ke, Lenan Wu
doaj   +1 more source

NLOS Identification and Positioning Algorithm Based on Localization Residual in Wireless Sensor Networks

Sensors, 2018
The problem of target localization in WSN (wireless sensor network) has received much attention in recent years. However, the performance of traditional localization algorithms will drastically degrade in the non-line of sight (NLOS) environment ...
Jingyu Hua, Yejia Yin, Weidang Lu, Yu Zhang, Feng Li   +4 more
doaj   +1 more source

Research Progress of Non-line-of-sight Underwater Wireless Optical Communication Technology

Guangtongxin yanjiu, 2023
Non-Line-of-Sight (NLOS) Underwater Wireless Optical Communication (UWOC) is mainly realized through the air-seawater interface reflection or the scattering of light by particles in seawater.
KONG Mei-wei, YUAN He-xiang, WANG Meng-qi, PAN Yan-yan, ZHOU Hui, YANG Qun-hui   +5 more
doaj  

Scatterer information based indoor NLOS multiple base station cooperative localization algorithm

Tongxin xuebao, 2021
In indoor environments, the localization accuracy of existing line of sight (LOS) solutions will deteriorate severely in non-line-of-sight (NLOS) environment.In order to solve this problem, an scatterer information based indoor NLOS multiple base ...
Liangbo XIE, Sheng LI, Mu ZHOU, Ze LI, Zengshan TIAN, Ya WANG, Changyou FU   +6 more
doaj   +2 more sources

An Advanced Artificial Fish School Algorithm to Update Decision Tree for NLOS Acoustic Localization Signal Identification with the Dual-Receiving Method

Applied Sciences, 2023
For indoor sensor systems, it is essential to implement an extra supporting area notification part. To inform the real-time coordinates, the time difference of arrival (TDOA) algorithm can be introduced.
Ruixiang Kan, Mei Wang, Xin Liu, Xiaojuan Liu, Hongbing Qiu   +4 more
doaj   +1 more source