wireless optical communication system

... LIST OF ABBREVIATIONS OWC - Optical Wireless Communication IsOWC - Intersatellite Optical Wireless Communication RF - Radio Frequency SCORE - Signal Communication by Orbital Relay LEO ... Conclusions 23 25 25 25 26 26 27 27 4 SYSTEM MODELING 4.1 Introduction 4.2 OptiSystem Software 4.3 System Model in OptiSystem 4.4 System Components 4.4.1 IsOWC Transmitter Design ... each subsystems used in modeling the IsOWC system. The part will be divided into three, the transmitter, OWC channel and the receiver part. MODELING INTERSATELLITE OPTICAL WIRELESS COMMUNICATION...

Ngày tải lên: 19/01/2014, 07:20

Ngày tải lên: 21/06/2014, 05:20

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Ngày tải lên: 23/06/2014, 00:20

... developed the AMPS communications system in the late 1970s [BEL-79]. The AMPS system was introduced into commercial service in 1983 by AT&T with a 3-month trial in Chicago. The system operates ... system to be investigated. The evolution of mobile communications can be categorised into generations of develop- ment. Presently, we are on the verge of the third-generation (3G) of mobile systems. ... wireless- local area network (W- LAN) solutions. 2G systems are synonymous with the globalisation of mobile systems, and in Mobile Satellite Communication Networks. Ray E. Sheriff and Y. Fun Hu Copyright...

Ngày tải lên: 14/09/2012, 11:26

... Control GSM Global System for Mobile Communications GSN GPRS Support Node GSO Geostationary Orbit GTP GPRS Tunnelling Protocol GTS Gateway Transceiver Subsystem GWS Gateway Subsystem HALE High ... Gateway Message Switching System GNSS Global Navigation Satellite System GOCC Ground OCC GPM Gross Potential Market GPRS General Packet Radio Service GPS Global Positioning System GRAN Generic Radio ... Future Public Land Mobile Telecommunication Systems FS Fixed Station FSK Frequency Shift Keying FSL Free Space Loss FTP File Transfer Protocol Mobile Satellite Communication Networks344 FVC Forward...

Ngày tải lên: 14/09/2012, 11:26

... II trong sách “Principles of Digital Communication Systems and Computer Networks” của nhóm em. Phần I – Các hệ thống truyền thông số (Digital Communation System) Chương 2: Lý Thuyết Thông Tin (Information ... sư truyền thông. Tài liệu tham khảo C. E. Shannon. "A Mathematical Theory of Communication. " Bell System Technical Journal, Vol. 27, 1948. Tất cả các kỹ sư truyền thông phải đọc bài ... Cuốn sách của ông “A Maththemathical Theroy of Communication ” (Một lý thuyết toán học của sự truyền thông tin) được xuất bản trong Tạp chí Bell System Technical là cơ sở cho sự phát triển toàn...

Ngày tải lên: 18/09/2012, 10:13

... modularly de- signed FO distributor system for the termination and patching of fibre-optic cables. The system is built up around the Distribution Cabinet System IPC (basic frame with corresponding ... tray ■ cable channel units ODS 500 Optical Distribution System The modular design is based on the purchase of individual components. The functionality of the system is continually being expanded. Order ... management system, which consists of the cable guide unit vertical, the cable guide tray, the cable channel unit and the storage unit. Sub-rack (3 U) The sub-racks are outfitted with a feed-in system...

Ngày tải lên: 22/10/2013, 11:15

Ngày tải lên: 12/12/2013, 04:15

Ngày tải lên: 20/12/2013, 19:15

... of the resulting optical signal. Most digital lightwave systems employ OOK in combination with PCM. 1.3 Optical Communication Systems As mentioned earlier, optical communication systems differ ... optical communication system. It consists of a transmitter, a communication channel, and a receiver, the three elements common to all communication systems. Optical communication systems can be clas- sified ... communication systems currently use optical fibers, the commonly used term for them is fiber-optic communication systems. The term lightwave system is also sometimes used for fiber-optic communication systems, although...

Ngày tải lên: 24/12/2013, 01:16

... channel powers in optical communication systems are typically below 10 mW, SRS is not a limiting factor for single-channel lightwave systems. However, it affects the performance of WDM systems considerably; ... fiber-optic communications. Several books devoted entirely to optical fibers cover numerous advances made in their design and understanding [12]–[21]. This chapter focuses on the role of optical fibers as ... bandwidth originates from the general theory of time-invariant linear systems [59]. If the optical fiber can be treated as a linear system, its input and output powers should be related by a general...

Ngày tải lên: 24/12/2013, 01:16

... 1.55- µ m optical communication systems operating at bit rates of 2.5 Gb/s or more. DFB lasers are reliable enough that they have been used since 1992 in all transoceanic lightwave systems. 3.4.2 ... limit the performance of optical communication systems, especially when β 2 C > 0, where β 2 is the dispersion parameter 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 source because of their superior performance compared with LEDs....

Ngày tải lên: 24/12/2013, 01:16

... 14. [5] B. L. Kasper, in Optical Fiber Telecommunications II, S. E. Miller and I. P. Kaminow, Eds., Academic Press, San Diego, CA, 1988, Chap. 18. [6] S. B. Alexander, Optical Communication Receiver ... G. Swartz, in Optical Fiber Telecommunications II, S. E. Miller and I. P. Kaminow, Eds., Academic Press, San Diego, CA, 1988, Chap. 20. [54] K. Kobayashi, in Optical Fiber Telecommunications ... nonetheless useful for optical communication systems simply because of their higher sensitivity. Receiver sensitivity is an important issue in the design of lightwave systems and is discussed...

Ngày tải lên: 24/12/2013, 01:16

... Koch, Eds., Optical Fiber Telecommunications III, Academic Press, San Diego, CA, 1997. [5] G. E. Keiser, Optical Fiber Communications, 3rd ed., McGraw-Hill, New York, 2000. 5.1. SYSTEM ARCHITECTURES 185 (the ... third-generation systems operating near 1.55 µ m and can exceed 100 (Tb/s)-km for the fourth-generation systems. 5.1.2 Distribution Networks Many applications of optical communication systems require ... Gnauck, in Optical Fiber Telecommunications II,S. E. Miller and I. P. Kaminow, Eds., Academic Press, San Diego, CA, 1988, Chap. 21. [2] S. E. Miller and I. P. Kaminow, Eds., Optical Fiber Telecommunications...

Ngày tải lên: 24/12/2013, 01:16

Ngày tải lên: 24/12/2013, 14:16

... 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 to the program of the workshop, the book is divided into four parts: Information and Communication Theory for Optical Communications. This first part examines optical ... methods. Key words: optical Kerr effect; optical fiber nonlinearity; nonlinear distortion; optical fiber theory. 1. INTRODUCTION The nonlinear Schrödinger equation governs the propagation of the optical field...

Ngày tải lên: 20/01/2014, 06:20

... Sequences 6.2 Systems with Random Spreading Sequences Direct-Sequence Systems with PSK Quadriphase Direct-Sequence Systems 6.3 Wideband Direct-Sequence Systems Multicarrier Direct-Sequence System Single-Carrier ... the potential capabilities of spread- spectrum communication systems. Although direct-sequence systems greatly suppress interference, practical systems require channel codes to deal with the residual ... every linear code is equivalent to a systematic linear code [1]. Therefore, systematic block codes are the standard choice and are assumed henceforth. Some systematic codewords have only one nonzero...

Ngày tải lên: 20/01/2014, 06:20

... 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 receivers by ... example, ∆ ν g ∼5 THz for semiconductor optical amplifiers for which T 2 ∼60 fs. Amplifiers with a relatively large bandwidth are preferred for optical communication systems because the gain is then nearly ... spacing becomes smaller as the system length increases. Typically, L A is kept near 50 km for undersea systems but can be increased to 80 km or so for terrestrial systems with link lengths under...

Ngày tải lên: 21/01/2014, 06:20

Ngày tải lên: 21/01/2014, 06:20