Results 41 to 50 of about 6,071 (191)

Multipath Routing of Fragmented Data Transfer in a Smart Grid Environment [PDF]

open access: yes, 2014
The purpose of this paper is to do a general survey on the existing communication modes inside a smart grid, the existing security loopholes and their countermeasures.
Borgohain, Amardeep   +3 more
core   +1 more source

Wireless body sensor networks for health-monitoring applications [PDF]

open access: yes, 2008
This is an author-created, un-copyedited version of an article accepted for publication in Physiological Measurement. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it.
Foster, R, Hao, Y
core   +1 more source

Compact Multiband Planar Fractal Cantor Antenna for Wireless Applications: An Approach

open access: yesInternational Journal of Antennas and Propagation, 2012
A compact multiband fractal antenna which is a new criterion in communication is proposed. The optimized prototype measures 35 mm × 31 mm × 1.6 mm. The proposed antenna covers WLAN IEEE 802.11b, 802.15, PCS, GSM lower and higher bands, DCS, IMT, UMTS, Wi-
Gopalakrishnan Srivatsun   +1 more
doaj   +1 more source

Efficient adders for assistive devices

open access: yesEngineering Science and Technology, an International Journal, 2017
The Body sensor network [IEEE 802.15] is a wireless communication network consisting of assistive devices which are of prime importance in medical applications.
Mansi Jhamb, Gitanjali
doaj   +1 more source

Modelling and Verification of a Cluster-tree Formation Protocol Implementation for the IEEE 802.15.4 TSCH MAC Operation Mode [PDF]

open access: yes, 2017
Correct and efficient initialization of wireless sensor networks can be challenging in the face of many uncertainties present in ad hoc wireless networks.
Dandelski, Conrad   +2 more
core   +3 more sources

Performance Analysis and Enhancement of Multiband OFDM for UWB Communications

open access: yes, 2006
In this paper, we analyze the frequency-hopping orthogonal frequency-division multiplexing (OFDM) system known as Multiband OFDM for high-rate wireless personal area networks (WPANs) based on ultra-wideband (UWB) transmission.
Lampe, L., Schober, R., Snow, C.
core   +1 more source

An N-bit digitally variable ultra wideband pulse generator for GPR and UWB applications [PDF]

open access: yes, 2006
This paper presents a low-cost Ultra Wideband (UWB) pulse generator that can vary the pulse duration digitally by using a Step Recovery Diode (SRD), microstrip transmission lines and PIN diodes.
Bennett   +10 more
core   +1 more source

Design and Implementation of an Indoor Localization System Based on RSSI in IEEE 802.11ax

open access: yesApplied Sciences
This article describes the design, implementation, and evaluation of an indoor localization system based on Received Signal Strength Indicator (RSSI) measurements in wireless sensor networks.
Roberto Gaona Juárez   +6 more
doaj   +1 more source

On adaptive frequency hopping to combat coexistence interference between bluetooth and IEEE 802.11b with practical resource constraints [PDF]

open access: yes, 2004
In contrast to traditional frequency hopping techniques, Adaptive Frequency Hopping (AFH) is a low cost and low power solution to avoid interference dynamically.
Chek, MCH, Kwok, YK
core   +1 more source

Iterative channel estimation based on the Turbo principle for UWB system

open access: yesTongxin xuebao, 2008
An iterative channel estimation algorithm and receiver structures based on Turbo principle were proposed for estimating channel parameters in a TH-UWB system under the realistic UWB channel model from IEEE 802.15.
TENG Peng-wei1   +2 more
doaj   +2 more sources

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