Results 21 to 30 of about 555,563 (301)
A study of antenna array based multipath propagation phenomenon in LAS-CDMA standard [PDF]
, 2004 Throughout the history of wireless communications, spatially diversity's antenna array system has being important in improving the radio link between wireless users.
Ismail, Mahamod +4 more
core +1 more source
Sensors, 2020 Contemporary wireless networks dramatically enhance data rates and latency to become a key enabler of massive communication among various low-cost devices of limited computational power, standardized by the Long-Term Evolution (LTE) downscaled ...
Adriana Lipovac +2 more
doaj +1 more source
Statistical channel model for 6G communication networks in Banda Aceh City
Радіоелектронні і комп'ютерні системи, 2023 Wireless technology is expected to undergo considerable transformation because of the numerous services offered by 6G communication networks, which virtually entirely encompass every part of everyday life and use a variety of devices. Channel modeling is
Hubbul Walidainy +4 more
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Measurement and Statistical Analysis of Distinguishable Multipaths in Underground Tunnels
International Journal of Antennas and Propagation, 2020 Compared with the line-of-sight (LOS) condition, the multipath effect is more serious in the non-line-of-sight (NLOS) condition. Therefore, the LOS and NLOS identification is necessary for the multipath analysis of signal propagation.
Junchang Sun +4 more
doaj +1 more source
Jurnal Elkomika, 2021 ABSTRAK Generasi telekomunikasi kelima (5G) diterapkan pada 2021 dengan frekuensi tinggi yang menyebabkan redaman yang besar dibandingkan pita sub-1 GHz. Penelitian ini mengkaji sistem 5G dengan frekuensi operasi 3,3 GHz dan bandwidth 99 MHz berdasarkan
RENI DYAH WAHYUNINGRUM +2 more
doaj +1 more source
Femtosecond deep-infrared optical parametric oscillator pumped directly by a Ti:sapphire laser [PDF]
, 2018 We report a high-repetition-rate femtosecond optical parametric oscillator (OPO) for the deep-infrared (deep-IR) based on the nonlinear optical crystal, CdSiP2 (CSP), pumped directly by a Ti:sapphire laser, for the first time. By pumping CSP at
Chaitanya Kumar, S. +4 more
core +1 more source
Power-Delay-Profile-Based MMSE Channel Estimations for OFDM Systems
Electronics, 2023 This paper deals with the problem of the channel estimation of orthogonal frequency division multiplexing (OFDM) signals transmitted through a time-varying fading channel. We show that an accurate power delay profile (PDP) estimator can be obtained by utilizing the cyclic redundancy induced by a cyclic prefix (CP), which can be applicable to OFDM ...
Sungmook Lim, Hanho Wang, Kyunbyoung Ko
openaire +1 more source
Dispersive properties of quasi-phase-matched optical parametric amplifiers [PDF]
, 2002 The dispersive properties of non-degenerate optical parametric amplification in quasi-phase-matched (QPM) nonlinear quadratic crystals with an arbitrary grating profile are theoretically investigated in the no-pump-depletion limit.
A. Dogariu +39 more
core +2 more sources
Channel characterization in the 5.8GHz band in a suburban area
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsBased on signal measurements carried out in the 5.8 GHz band, which is reserved for unlicensed WiMAX in Brazil, this paper evaluates narrowband and wideband characteristics on the suburban area of Tanguá city in Rio de Janeiro State.
Wilyam D. T. Meza +2 more
doaj +1 more source
Deterministic Modeling of 5G Millimeter-Wave Communication in an Underground Mine Tunnel
IEEE Access, 2019 This paper presents broadband simulations and measurements of Millimeter-Waves (mm-wave) propagation in a rugged underground mine environment. Mathematical formulation was carried out in the framework of Uniform Theory of Diffraction (UTD) to develop a ...
Mohamad Ghaddar +4 more
doaj +1 more source