Results 31 to 40 of about 157,712 (295)
Experimental study of on-body radio channel performance of a compact ultra wideband antenna [PDF]
, 2015 In this paper, on-body radio channel performance of a compact ultra wideband (UWB) antenna is investigated for body-centric wireless communications.
Abbasi, Qammer H. +3 more
core +1 more source
Tunable Terahertz Absorber Based on Bulk-Dirac-Semimetal Metasurface
IEEE Photonics Journal, 2018 We propose a tunable terahertz (THz) absorber design that utilizes a bulk Dirac semimetal (BDS)-based metasurface. The absorber consists of a BDS film with a periodic ring slot, dielectric layer, and fully reflective gold mirror.
Yannan Jiang +3 more
doaj +1 more source
Low-Complexity Robust Adaptive Beamforming Based on INCM Reconstruction via Subspace Projection
Sensors, 2021 Adaptive beamforming is sensitive to steering vector (SV) and covariance matrix mismatches, especially when the signal of interest (SOI) component exists in the training sequence.
Yanliang Duan +3 more
doaj +1 more source
Joint beamforming and power control algorithm for cognitive MIMO broadcast channels via game theory
EURASIP Journal on Wireless Communications and Networking, 2017 In this paper, we present a game-theoretic approach for the purpose of deriving the problem of joint beamforming and power control in cognitive radio (CR) multiple-input multiple-output (MIMO) broadcast channels (CR MIMO-BCs), where the primary users ...
Shunlan Zhang, Ju Ni, Qing Peng
doaj +1 more source
Nonlinear voltage dependence of shot noise [PDF]
, 1999 The current noise in a multi-probe mesoscopic conductor can have a nonlinear dependence on the strength of driving bias voltage. This paper presents a theoretical formulation for the nonlinear noise spectra.
A. Kumar +38 more
core +2 more sources
Annals of Otology and Neurotology, 2018 AbstractTraditional tympanometry done with 226 Hz probe tone frequency has some inherent defects and limitations due to which it does not give a very true picture of the middle ear status, and tympanometric findings are often very deceptive. It is not uncommon for otologists to find that on opening the middle ear, the pathology in the middle ear is ...
Nilotpal Dutta, Anirban Biswas
openaire +1 more source
Sensors, 2021 We have built a Fizeau fiber interferometer to investigate the internal cylindrical defects in an aluminum plate based on laser ultrasonic techniques. The ultrasound is excited in the plate by a Q-switched Nd:YAG laser. When the ultrasonic waves interact
Wen-Bei Liu +5 more
doaj +1 more source
Velocity Dealiased Spectral Estimators of Range Migrating Targets using a Single Low-PRF Wideband Waveform [PDF]
, 2013 Wideband radars are promising systems that may provide numerous advantages, like simultaneous detection of slow and fast moving targets, high range-velocity resolution classification, and electronic countermeasures.
Besson, Olivier +3 more
core +3 more sources
, 2015 The focus of UWB antenna research activity has matured in recent years and currently mainly concentrates on applications such as biomedicine and security. Early UWB antenna designs were driven by the FCC allocation of spectrum in 2002 and focussed on obtaining wide impedance bandwidths with reasonable group delay characteristics.
Ammann, Max +2 more
openaire +3 more sources
Gateway deployment algorithm based on 6LoWPAN multi-gateway system
Dianzi Jishu Yingyong, 2018 The addition of multi-gateway function and protocol in the Destination Oriented Directed Acyclic Graph (DODAG) network routing topology of 6LoWPAN is conducive to the improvement of the entire network capacity and the reduction of energy consumption and ...
He Aizhou, Zheng Lin, Qu Qiji
doaj +1 more source