作者: 吼叫 時(shí)間: 2025-3-21 23:30 作者: nautical 時(shí)間: 2025-3-22 00:59
Ondrej Fiser,Vladimir Brazdaleicht zu vermittelnde Erfahrungen übersetzt werden. Im Zuge dessen erfolgt auch eine übertragung entsprechender Eigenschaften, sodass anzunehmen ist, dass Metaphern das Denken und letztlich auch das Handeln pr?gen. Dennoch weisen vorliegende Arbeiten darauf hin, dass Metaphern nicht systematisch pf作者: motor-unit 時(shí)間: 2025-3-22 08:01 作者: VERT 時(shí)間: 2025-3-22 12:23
An Overview of Optical Wireless Communications,rvices, which require enhancing user’s experience. The existing radio frequency based wireless communications are facing challenges in so far as being able to cope with these varied, sophisticated and bandwidth hungry services and applications. The ever evolving optical wireless communications (OWC)作者: EXPEL 時(shí)間: 2025-3-22 16:37 作者: dictator 時(shí)間: 2025-3-22 17:39 作者: Acclaim 時(shí)間: 2025-3-23 00:45
Experimental Validation of FSO Channel Models, appropriate for the research but being not typical one. Therefore, examples of measurements from Prague, Budapest, and Milano are added. Fog attenuation (in combination with cloud) is discussed and Kim formula predicting the fog attenuation from visibility was more or less acknowledged. More accura作者: 使激動 時(shí)間: 2025-3-23 02:24 作者: Demonstrate 時(shí)間: 2025-3-23 06:46
Channel Modeling for Visible Light Communications,s works. In our work, we consider wavelength dependency, effect of realistic light sources as well as different types of reflections such as specular and mixed cases of diffuse and specular. We use nonsequential ray tracing algorithms to calculate the detected power and path lengths from source to d作者: Diatribe 時(shí)間: 2025-3-23 10:07
Diffraction Effects and Optical Beam Shaping in FSO Terminals,a lens socket. An elliptically symmetrical Gaussian beam is considered in the analysis to improve the generality and to analyze beams produced by edge-emitting semiconductor lasers. From the Huygens-Fresnel principle, two models of the Fresnel diffraction were derived. These models provided means fo作者: Painstaking 時(shí)間: 2025-3-23 15:46 作者: 梯田 時(shí)間: 2025-3-23 18:44
Information Theoretical Limits of Free-Space Optical Links,lso allows its utilization for further performance analysis of various types of wireless communication systems. Under the umbrella of generalized fading channels, a unified ergodic capacity analysis of a free-space optical (FSO) link under both types of detection techniques (i.e., intensity modulati作者: Terrace 時(shí)間: 2025-3-23 22:50
Performance Analysis of FSO Communications Under Correlated Fading Conditions, channels. To do this, we firstly describe in detail the . model and explain how to model space-diversity FSO channels. Next, we investigate the fading correlation existing in real space-diversity FSO systems using wave-optics simulations. To integrate the fading correlation into the . channel model作者: Spartan 時(shí)間: 2025-3-24 02:50 作者: Cosmopolitan 時(shí)間: 2025-3-24 09:48
OFDM-Based Visible Light Communications,ns. The principals of OFDM techniques for intensity modulation and direct detection (IM/DD) systems are explained in detail in Dimitrov and Haas, Principles of LED Light Communications: Towards Networked Li-Fi, (2015) [.]. A number of inherently unipolar OFDM techniques were recently proposed as pow作者: 閑蕩 時(shí)間: 2025-3-24 14:30
Block Transmission with Frequency Domain Equalization for VLC,s. They employ an inverse fast Fourier transform (IFFT) at the transmitter and a fast Fourier transform (FFT) at the receiver, whereas the data symbols are processed block-wise. Pulse-amplitude modulation (PAM) or single subcarrier (SSC) modulation combined with block transmission and frequency doma作者: 整體 時(shí)間: 2025-3-24 18:19
Satellite Downlink Coherent Laser Communications, information systems in space. There is growing interest in the high sensitivity and spectral efficiency of coherent optical receivers for downlink systems, despite a higher cost and complexity than direct-detection receivers. In practice, however, when the link passes through the atmosphere, clear-作者: 堅(jiān)毅 時(shí)間: 2025-3-24 19:27
Cooperative Visible Light Communications,onsidered with two light sources; the one at the ceiling is connected to the backbone network and provides ambient light to the environment while the other one is mounted on the desk and used for task lighting. The system architecture builds upon DC-biased optical orthogonal frequency-division multi作者: CREST 時(shí)間: 2025-3-25 02:04
Coded Orbital Angular Momentum Modulation and Multiplexing Enabling Ultra-High-Speed Free-Space Opttal angular momentum (OAM)-based modulation and multiplexing for ultra-high-speed optical transmission over free-space optical (FSO) links. OAM is associated with the azimuthal phase dependence of the complex electric field. Because its eigenvectors are orthogonal, they can be used as basis function作者: Mendicant 時(shí)間: 2025-3-25 04:06
Mixed RF/FSO Relaying Systems,s networks. The outage performance of dual-hop amplify-and-forward (AF) relaying systems, composed of mixed radio frequency (RF)/free-space optical (FSO) links is presented, when the partial relay selection is considered based on outdated channel state information (CSI). We analyze an example when t作者: Obstacle 時(shí)間: 2025-3-25 10:56 作者: EVICT 時(shí)間: 2025-3-25 14:55 作者: overweight 時(shí)間: 2025-3-25 15:59 作者: 銀版照相 時(shí)間: 2025-3-25 22:26 作者: 污穢 時(shí)間: 2025-3-26 00:35 作者: violate 時(shí)間: 2025-3-26 04:51
Signals and Communication Technologyhttp://image.papertrans.cn/o/image/702714.jpg作者: liaison 時(shí)間: 2025-3-26 09:25
https://doi.org/10.1007/978-3-319-30201-0Optical Wireless Communication; Free-space Optical Communication; COST Action IC1101; Visible-light Com作者: chalice 時(shí)間: 2025-3-26 14:07 作者: arousal 時(shí)間: 2025-3-26 17:40
Diffraction Effects and Optical Beam Shaping in FSO Terminals,derived. It will be also shown, how the elliptical Gaussian beam can be used to improve the system’s resistance to some deteriorating effects, e.g., building sway. The third part of the chapter is focused on the analysis of the optimal optical intensity distribution within a radiated laser beam at a作者: 清晰 時(shí)間: 2025-3-27 00:27 作者: Militia 時(shí)間: 2025-3-27 01:31
OFDM-Based Visible Light Communications,FDM streams are superimposed in enhanced unipolar orthogonal frequency division multiplexing (eU-OFDM) to double the spectral efficiency of U-OFDM technique. For the first time, the novel eU-OFDM allows unipolar OFDM techniques to have same spectral efficiency of DCO-OFDM. In this chapter, the conce作者: Minutes 時(shí)間: 2025-3-27 06:19
Coded Orbital Angular Momentum Modulation and Multiplexing Enabling Ultra-High-Speed Free-Space Opturbulence effects can be handled, in addition to FSO-MIMO, through the use of the azimuthal phase correction method, similar to the Gerchberg-Saxton (GS) phase retrieval algorithm. Moreover, distortions introduced by turbulence will be compensated for via adaptive optics approaches. Additionally, LD作者: essential-fats 時(shí)間: 2025-3-27 09:46 作者: 稱贊 時(shí)間: 2025-3-27 15:16 作者: ablate 時(shí)間: 2025-3-27 21:38 作者: tympanometry 時(shí)間: 2025-3-27 22:37 作者: CHURL 時(shí)間: 2025-3-28 03:17
Z. Ghassemlooy,M. Uysal,M. A. Khalighi,V. Ribeiro,F. Moll,S. Zvanovec,A. Belmontest eine wichtige Vertrauenshinsicht im Hinblick auf die anstehende ?kologische Umgestaltung der ?konomie.?.Der Inhalt.Der Begriff des Vertrauens.Die Konstruktion von Vertrauen.Die Ausbeutung von Vertrauen.Vertrauen in der ?konomie und auf die ?konomie.978-3-658-36731-2978-3-658-36732-9作者: EXPEL 時(shí)間: 2025-3-28 10:03 作者: Tailor 時(shí)間: 2025-3-28 11:50 作者: Gleason-score 時(shí)間: 2025-3-28 16:12 作者: SPASM 時(shí)間: 2025-3-28 20:02 作者: constitutional 時(shí)間: 2025-3-29 00:55 作者: patella 時(shí)間: 2025-3-29 05:17 作者: Amorous 時(shí)間: 2025-3-29 10:41
Ali Mirvakili,Hany Elgala,Thomas D. C. Little,Valencia J. Koomson作者: cumulative 時(shí)間: 2025-3-29 11:35
Zabih Ghassemlooy,Wasiu Popoola,Stanislav Zvanovec作者: 粗俗人 時(shí)間: 2025-3-29 15:43 作者: adroit 時(shí)間: 2025-3-29 22:20 作者: BLUSH 時(shí)間: 2025-3-30 02:19
An Overview of Optical Wireless Communications,s technology can be used for short to long distance applications as in indoor visible light communications, ultra-violet, and free space optics. The chapter gives an overview of the OWC system focusing on the historical development and current status, as well as existing and envisioned applications areas.作者: Charade 時(shí)間: 2025-3-30 04:56 作者: AXIOM 時(shí)間: 2025-3-30 10:03
Ultraviolet Scattering Communication Channels,ter-symbol interference and bandwidth limitation resulting from frequency-dispersive nature of NLOS-UV channel, performances may be also degraded by high path losses and turbulence-induced fading as the link range increases. This chapter provides an overview of latest advances in NLOS-UV channel modeling and results.作者: 一個(gè)攪動不安 時(shí)間: 2025-3-30 13:05 作者: Allowance 時(shí)間: 2025-3-30 19:15 作者: Cardiac-Output 時(shí)間: 2025-3-30 23:07
Cooperative Visible Light Communications,ormance of the system is optimized through a subcarrier-based power allocation mechanism. Numerical results incorporating practical issues such as band-limited channel process and imperfect channel estimation reveal that cooperative VLC systems can significantly outperform the conventional point-to-point VLC systems.作者: ALIAS 時(shí)間: 2025-3-31 01:05
Mixed RF/FSO Relaying Systems,ity are presented. The effects of atmospheric turbulence strength, pointing errors standard deviation, number of relays and rank of selected relay, are observed, considering the effect of time correlation between current and outdated CSI of the source-relay channel.作者: 毛細(xì)血管 時(shí)間: 2025-3-31 08:49 作者: 典型 時(shí)間: 2025-3-31 09:25 作者: 嚙齒動物 時(shí)間: 2025-3-31 17:23 作者: 內(nèi)閣 時(shí)間: 2025-3-31 19:40 作者: 天賦 時(shí)間: 2025-3-31 21:57 作者: 沉著 時(shí)間: 2025-4-1 02:12
MIMO Free-Space Optical Communication,en RF and optical wireless MIMO channels are discussed and the most recent results reported for different channel models are presented. We further extend our investigation to include some important results on distributed MIMO FSO systems.作者: orthodox 時(shí)間: 2025-4-1 06:27
9樓作者: 榨取 時(shí)間: 2025-4-1 11:58
9樓作者: INCUR 時(shí)間: 2025-4-1 18:05
9樓作者: Liability 時(shí)間: 2025-4-1 19:16
10樓作者: 正面 時(shí)間: 2025-4-2 02:10
10樓作者: DIKE 時(shí)間: 2025-4-2 06:52
10樓作者: Deceit 時(shí)間: 2025-4-2 07:30
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