Results 41 to 50 of about 82,398 (279)

Energy efficiency of some non-cooperative, cooperative and hybrid communication schemes in multi-relay WSNs [PDF]

, 2013
In this paper we analyze the energy efficiency of single-hop, multi-hop, cooperative selective decode-and-forward, cooperative incremental decode-and-forward, and even the combination of cooperative and non-cooperative schemes, in wireless sensor ...
Brante, Glauber, Imran, Muhammad Ali, Kakitani, Marcos, Munaretto, Anelise, Souza, Richard Demo   +4 more
core   +1 more source

Multi-Channel Two-way Time of Flight Sensor Network Ranging [PDF]

, 2012
Two-way time of flight (ToF) ranging is one of the most interesting approaches for localization in wireless sensor networking since previous ToF ranging approaches using commercial off-the-shelf (COTS) devices have achieved good accuracy.
Eriksson, Joakim, Pettinato, Paolo, Voigt, Thiemo, Wirström, Niklas   +3 more
core   +2 more sources

Inertial measurement unit–aided dual-frequency radio frequency identification localization in line-of-sight and non-line-of-sight hybrid environment

International Journal of Distributed Sensor Networks, 2018
The mitigation of non-line-of-sight propagation conditions is one of main challenges in wireless signal–based indoor localization. When radio frequency identification localization technology is applied in applications, the received signal strength ...
Jie Wu, Minghua Zhu, Bo Xiao, Wei He
doaj   +1 more source

Accurate but fragile passive non-line-of-sight recognition

Communications Physics, 2021
Non-line-of-sight imaging allows reconstruction and recognition of an obscured object, but external manipulation of the data can lead to inaccurate results.
Yangyang Wang, Yaqin Zhang, Meiyu Huang, Zhao Chen, Yi Jia, Yudong Weng, Lin Xiao, Xueshuang Xiang   +7 more
doaj   +1 more source

Multihop relay techniques for communication range extension in near-field magnetic induction communication systems [PDF]

, 2013
In this paper, multihop relaying in RF-based com munications and near field magnetic induction communication (NFMIC) is discussed. Three multihop relay strategies for NFMIC are proposed: Non Line of Sight Magnetic Induction Relay (NLoS-MI Relay), Non ...
Abolhasan, M, Franklin, D, Masihpour, M
core   +2 more sources

Semi-Definite Programming Relaxation for Non-Line-of-Sight Localization

, 2012
We consider the problem of estimating the locations of a set of points in a k-dimensional euclidean space given a subset of the pairwise distance measurements between the points.
Ekambaram, Venkatesan, Fanti, Giulia, Ramchandran, Kannan   +2 more
core   +1 more source

Fast and robust anchor calibration in range-based wireless localization [PDF]

, 2013
In this paper we investigate the anchor calibration problem where we want to find the anchor positions when the anchors are not able to range between each other.
Steendam, Heidi, Van de Velde, Samuel, Van Torre, Patrick   +2 more
core   +1 more source

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

A survey of localization in wireless sensor network [PDF]

, 2012
Localization is one of the key techniques in wireless sensor network. The location estimation methods can be classified into target/source localization and node self-localization. In target localization, we mainly introduce the energy-based method.
Ampeliotis D., Borras J., Brida P., Carsten Maple, Chen P. C., Chen Y., Chengdong Wu, Chia-Ho O., Deng K., Dong S., Erol M., Fujiwara R., Gezici S., Gogolak L., Goldenberg D. K., Hamouda Y. E. M., Hao Wu, Kaplan L. M., Kim W., Lee J., Long Cheng, Mengxin Li, Niu R., Qu X., Qu X., Shang Y., Silventoinen M. I., Suroso D. J., Venkatraman S., Wylie M. P., You C., Yunzhou Zhang, Zhu Y.   +32 more
core   +3 more sources

Empowering IoT: leveraging data sensor communication with LoRAWAN in diverse environments

Acta Polytechnica
The Internet of Things (IoT) connects countless devices, such as sensors and actuators, necessitating an efficient long-range communication technology.
Noprianto Noprianto, Habibie Ed Dien, Septian Enggar Sukmana, Fayyadh Al Baity, Mustika Mentari   +4 more
doaj   +1 more source