Results 61 to 70 of about 2,923 (181)

Adaptive Subchip Multipath Resolving for Wireless Location Systems

open access: yesEURASIP Journal on Advances in Signal Processing, 2006
Reliable positioning of cellular users in a mobile environment requires accurate resolving of overlapping multipath components. However, this task is difficult due to fast channel fading conditions and data ill-conditioning, which limit the performance ...
Yousef Nabil R   +2 more
doaj   +1 more source

Electroencephalogram‐Driven Recognition of Parkinson's Disease Through a Mycelium‐Inspired Memristive Reservoir Computing Circuit

open access: yesAdvanced Intelligent Systems, Volume 8, Issue 7, July 2026.
This work presents a bio‐inspired computing framework for Parkinson's disease analog recognition using electroencephalogram signals. Temporally encoded EEG features stimulate a mycelium‐inspired memristive reservoir, where disease‐related patterns emerge through physical spatiotemporal dynamics.
Ioannis K. Chatzipaschalis   +5 more
wiley   +1 more source

A Conjugate Operator Pair of Partial Differential Equations Bridging Born and Kirchhoff Approximations for Wave‐Equation Inversion

open access: yesGeophysical Prospecting, Volume 74, Issue 6, July 2026.
ABSTRACT A conjugate operator pair is introduced for wave‐equation Kirchhoff modelling and migration, formulated as time‐space partial differential equations. The operator pair allows for iterative linearized waveform inversion and supports the reconstruction of angle‐dependent reflectivity images. The proposed forward modelling operator represents the
Wei Zhang, Mauricio D. Sacchi
wiley   +1 more source

Error Performance of DDPSK Receiver in the Presence of Composite Fading

open access: yesIEEE Access
We investigate the justification for implementing double differential phase-shift keying (DDPSK) instead of differential phase-shift keying (DPSK) in the presence of carrier frequency offset (CFO) over wireless channels affected by thermal noise ...
Goran T. Djordjevic   +3 more
doaj   +1 more source

Detection Performance of Polarization and Spatial Diversities for Indoor GNSS Applications

open access: yesInternational Journal of Antennas and Propagation, 2012
Multipath fading in the form of signal power fluctuation poses a formidable challenge to GNSS signal detection in harsh multipath environments such as indoors.
Mohammadreza Zaheri   +3 more
doaj   +1 more source

Multipath Detection Using Boolean Satisfiability Techniques

open access: yesJournal of Computer Networks and Communications, 2011
A new technique for multipath detection in wideband mobile radio systems is presented. The proposed scheme is based on an intelligent search algorithm using Boolean Satisfiability (SAT) techniques to search through the uncertainty region of the multipath
Fadi A. Aloul, Mohamed El-Tarhuni
doaj   +1 more source

Research on Passive Troposcatter Location System [PDF]

open access: yesRadioengineering, 2019
Electromagnetic (EM) wave of enemy radar propagated by troposcatter can be utilized for beyond line-of-sight (b-LoS) location. To provide theoretical basis for passive troposcatter location system, channel characteristics including propagation loss ...
Z. Liu, X. H. Chen, Q. Liu
doaj  

Capacity of Time-Hopping PPM and PAM UWB Multiple Access Communications over Indoor Fading Channels

open access: yesEURASIP Journal on Wireless Communications and Networking, 2008
The capacity of time-hopping pulse position modulation (PPM) and pulse amplitude modulation (PAM) for an ultra-wideband (UWB) communication system is investigated based on the multipath fading statistics of UWB indoor wireless channels.
T. Aaron Gulliver, Hao Zhang
doaj   +1 more source

USE OF THE REDUNDANT BISPEСTRUM-ORGANIZED CODE IN NONSTATIONARY WIRELESS CHANNEL CONTAMINATED BY STRONG FADING

open access: yesРадіоелектронні і комп'ютерні системи, 2019
One of the main problems in modern wireless telecommunication systems and networks is the transmission and reception of signals in a multipath environment.
Виктория Владимировна Науменко   +3 more
doaj   +1 more source

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