wireless optical communication systems ppt
Tài liệu PRINCIPLES OF SPREAD-SPECTRUM COMMUNICATION SYSTEMS ppt
... the potential capabilities of spread-spectrum communication systems. Although direct-sequence systems greatlysuppress interference, practical systems require channel codes to deal with theresidual ... ProbabilityComplex-Valued Quaternary Sequences6.2 Systems with Random Spreading SequencesDirect-Sequence Systems with PSKQuadriphase Direct-Sequence Systems 6.3Wideband Direct-Sequence Systems Multicarrier Direct-Sequence ... FieldLong Nonlinear Sequences2.3 Systems with PSK ModulationTone Interference at Carrier FrequencyGeneral Tone InterferenceGaussian Interference2.4Quaternary Systems 2.5Pulsed Interference2.6Despreading...
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Tài liệu Fibre optic communication systems P3 pptx
... 1.55-µm optical communication systems operating at bit rates of2.5 Gb/s or more. DFB lasers are reliable enough that they have been used since 1992in all transoceanic lightwave systems. 3.4.2 ... limit the performance of optical communication systems, especially whenβ2C > 0, whereβ2is the dispersionparameter and C is the chirp parameter. Even though optical pulses emitted from ... recombination time associated with stimulated emission.Most fiber-optic communication systems use semiconductor lasers as an optical sourcebecause of their superior performance compared with LEDs....
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Tài liệu OPTICAL COMMUNICATION THEORY AND TECHNIQUES ppt
... Optic Communication Systems, 3rd Ed., Wiley, 2002.B. F. Jorgensen, B. Mikkelsen and C. J. Mahon, “Analysis of optical amplifier noise in co-herent optical communication systems with optical ... Digital Communications. According tothe program of the workshop, the book is divided into four parts:Information and Communication Theory for Optical Communications. Thisfirst part examines optical ... methods.Key words: optical Kerr effect; optical fiber nonlinearity; nonlinear distortion; optical fibertheory.1.INTRODUCTIONThe nonlinear Schrödinger equation governs the propagation of the optical field...
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Tài liệu Fibre optic communication systems P6 ppt
... issues for long-haul systems employing a cascaded chain of optical amplifiers.6.5.1 Optical Preamplification Optical amplifiers are routinely used for improving the sensitivity of optical receiversby ... example, ∆νg∼5 THz for semiconductor optical amplifiers for which T2∼60 fs.Amplifiers with a relatively large bandwidth are preferred for optical communication systems because the gain is then nearly ... limitation on all long-haul systems designed with a cascaded chain of optical amplifiers [123]–[126].The physical origin of ASE-induced jitter can be understood by noting that optical amplifiers affect...
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Tài liệu Fibre optic communication systems P7 ppt
... Chapter 6 that with the advent of optical amplifiers, fiber lossesare no longer a major limiting factor for optical communication systems. Indeed, mod-ern lightwave systems are often limited by the ... provided by the third-generation terrestrial systems operating near 1.55µmand using optical transmitters containing a distributed feedback (DFB) laser. Such systems generally use the existing fiber-cable ... terrestrial lightwave systems but isreduced to about 50 km for submarine systems. Because of cost considerations, most laboratory experiments use a fiber loop inwhich the optical signal is forced...
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Tài liệu Fibre optic communication systems P10 ppt
... Persoinick, Eds., Coherent Lightwave Communications, IEEEPress, Piscataway, NJ, 1990.[15] S. Betti, G. de Marchis, and E. Iannone, Coherent Optical Communication Systems, Wi-ley, New York, 1995.[16] ... 1995.[16] S. Ryu, Coherent Lightwave Communication Systems, Artec House, Boston, 1995.[17] F. Heismann, S. K. Korotky, and J. J. Veselka, in Optical Fiber Telecommunications III,Vol. B, I. P. ... important for long-haul systems using cascaded optical am-plifiers [111]. Even XPM effects become significant in coherent FSK systems [112].484CHAPTER 10. COHERENT LIGHTWAVE SYSTEMS invariably occur...
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SOLUTIONS MANUAL Communication Systems Engineering Second EditionJohn G. Proakis Masoud ppt
... +1)ej2πftdf=12j1j2πtfej2πft+14π2t2ej2πft0−12+12j1j2πtej2πft0−12−12j1j2πtfej2πft+14π2t2ej2πft120+12j1j2πtej2πft120= j−14πtsin πt +14π2t2(cos πt − 1)38SOLUTIONS MANUAL Communication Systems EngineeringSecond EditionJohn G. ProakisMasoud SalehiPrepared by Evangelos ZervasUpper...
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SOLUTIONS MANUAL Communication Systems Engineering Second EditionJohn G. Proakis ppt
... write∞n=−∞|xn|2=−Mn=−∞|xn|2+Mn=−M|xn|2+∞n=M|xn|27SOLUTIONS MANUAL Communication Systems EngineeringSecond EditionJohn G. ProakisMasoud SalehiPrepared by Evangelos ZervasUpper...
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báo cáo hóa học:" On the interchannel interference in digital communication systems, its impulsive nature, and its mitigation" ppt
... interferers in wireless communications. IEEE Trans. Signal Process. 51, 64–76 (2003)[4] AV Nikitin, On the impulsive nature of interchannel interference in digital communication systems, inProceedings ... has no competing interests.References[1] K Slattery, H Skinner, Platform Interference in Wireless Systems (Elsevier, Amsterdam, 2008)[2] F Leferink, F Silva, J Catrysse, S Batterman, V Beauvois, ... IntroductionNowadays, it is becoming more and more common that multiple digital communication devices, including wireless, coexist and concurrently operate in close physical proximity. A typical...
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Báo cáo hóa học: " Research Article Signal Processing by Generalized Receiver in DS-CDMA Wireless Communication Systems with Optimal Combining and Partial Cancellation" docx
... systems with randomsignature sequences,” IEEE Transactions on Communications,vol. 37, no. 10, pp. 1052–1061, 1989.[35] J. C. Liberti Jr . and T. S. Rappaport, Smart Antennas for Wireless Communications: ... the IEEE Military Communications Conference(MILCOM ’91), vol. 2, pp. 571–575, McLean, Va, USA,November 1991.[33] R. E. Ziemer and W. H. Tranter, Principles of Communications: Systems, Modulation, ... remote sensing systems, ” WSEAS Transactions on SignalProcessing, vol. 2, no. 1, pp. 203–208, 2005.[29]V.Tuzlukov,W.S.Yoon,andY.D.Kim,“Adaptivebeam-former generalized detector in wireless sensor...
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Báo cáo sinh học: " Research Article Automatic Modulation Recognition Using Wavelet Transform and Neural Networks in Wireless Systems" ppt
... and modulation schemes used intelecommunication systems (2G/3G and 4G).In particular, ADMR has g ained a great attention inmilitary applications, such as communication intelligence(COMINT), ... 2004.[7]A.K.NandiandE.E.Azzouz,“Algorithmsforautomaticmodulation recognition of communication signals,” IEEETransactions on Communications, vol. 46, no. 4, pp. 431–436,1998.[8] A. Swami and B. M. ... QAMmodulation classification algorithm using cyclic cumulants,”in Proceedings of the IEEE Wireless Communications andNetworking Conference (WCNC ’04), pp. 745–748, 2004.[10] B. G. Mobasseri,...
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Báo cáo hóa học: " Research Article A WiMAX-Based Implementation of Network MIMO for Indoor Wireless Systems" pptx
... European Wireless Conference, Paris, France, April 2007.[34] P. Almers, E. Bonek, A. Burr, et al., “Survey of Channeland Radio Propagation Models for WirelessMIMO Systems, ”EURASIP Journal on Wireless ... Implementation of Network MIMO forIndoor Wireless Systems Sivarama Venkatesan,1Howard Huang,1Angel Lozano,2andReinaldoValenzuela11 Wireless Communications Research Bell Labs, Alcatel-Lucent ... InternationalConference on Communications (ICC ’08), pp. 4106–4110, May2008.[23] E. Aktas, J. Evans, and S. Hanly, “Distributed decodingin a cellular multiple-access channel,” IEEE Transactions on Wireless Communications,...
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Báo cáo hóa học: " Research Article Green Networking for Major Components of Information Communication Technology Systems" pptx
... within the “Cloud”. For this to happen the CloudEURASIP Journal on Wireless Communications and Networking 7IEEE Electronics and Telecommunications is currentlydeveloping a Ubiquitous Green Community ... Journal on Wireless Communications and NetworkingVolume 2009, Article ID 656785, 7 pagesdoi:10.1155/2009/656785Research ArticleGreen Networking for Major Components ofInformation Communication ... IEEE Standards Association, 2009, http://grouper.ieee.org/groups/1888/.EURASIP Journal on Wireless Communications and Networking 5must provide broadband bandwidth, security to users, andshould...
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