free-space optical techniques
SPATIAL DIVERSITY TECHNIQUES IN MIMO WITH FREE SPACE OPTICAL COMMUNICATION
... with Free Space Optical (FSO) link using spatial diversity ...combining techniques at the reception side to improve the overall system ...
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Degradation Measures in Free Space Optical Communication (FSO) and its Mitigation Techniques A Review
... different optical wavelengths suffer different attenuation but the use of longer wavelengths having high penetration against fog, can overcome the scattering or absorption of data [13- ...
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In Campus Communication system Using Optical Principle And Techniques (Reciever)
... other hand, is a line of sight technology that uses air/free space as the medium of transmission and is relatively simple. Unlike radio frequencies, the technology requires no spectrum licensing. It is ...
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Free space optical interconnections for an incoherent correlator
... planar optical components to form 3-D systems, though the speculations were mainly involved with optical fibre communications at that time ...lithographic techniques on ...between optical ...
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OFDM in Free Space Optical Communication System
... ABSTRACT: The hybrid technology that combines the OFDM and FSO is helps to improve the overall performance of the communication system. FSO is the free space optical communication system where that ...
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Saturation in cascaded optical amplifier free space optical communication systems
... of free-space optical (FSO) communication as a viable approach for terrestrial short range access ...the optical fibre which would be needed in optical fibre communication systems [4, ...
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Comparative Analysis of OOK, BPSK, DPSK and PPM Modulation Techniques for Intersatellite Free Space Optical Communication
... the optical communication system is the optical source, which can easily be ...an optical system which is used as a carrier ...in optical communication applications because of their size, ...
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Performance Evaluation of Free Space Optical Wireless Communication
... The simulation of this work is carried out for various values of M (the number of symbols on the carrier) in the M-ary modulation. Two different modulations, PSK and QAM, are considered here. As is conventional, the ...
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Integrated polymer microprisms for free space optical beam deflecting
... This approach to beam deflection, at the microscopic scale, is similar to previous work where micro-optical elements have been mounted onto finished laser arrays [9, 10, 11], but we are not aware of a greyscale ...
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Investigating Wavelength Dependency of Terrestrial Free Space Optical Communication Link
... Free space optical communication involves fiber-less optical based data transmission using visible and infrared bands of the ...of free space optical link for different ...
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Model for the prediction of rain attenuation affecting free space optical links
... Mitigation techniques also include adaptive transmission (where the transmit power, the modulation, and/or the coding are adjusted to the actual channel conditions), and cooperative transmission through multi-hop ...
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Free space optical in vehicular networks using rectangular guiding models
... We have employed ray tracing techniques to simulate the transmission of optical wireless signals through a new environment that can be implemented in vehicles. This initial study has focused on power ...
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Free Space Optical Using Different Modulation Techniques – A Review
... wavelength, optical power, transmission bandwidth, divergence angle and optical loss on the transmitter and bit error rate (BER), receiver lens diameter, and receive field of view (FOV) on the ...of ...
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Comparison of Polarization Shift Keying and Amplitude Shift Keying Modulation Techniques in FSO
... Free-space optical communication system is an optical communication technology which uses air as a medium to transmit signal from one place to other in the form of light ...modulation ...
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Improvement in Performance of Free Space Optical Communication
... modulation techniques, the research is going on to implement other modulation techniques along with some coding techniques to get the optimum performance of the ...system. Free-space ...
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Design and Implementation of Free Space Optics
... Free space optics (FSO) is a wireless communication technology in which the line of sight technology is ...kilometres. Free-space-optical links can be implemented using laser/LEDs as a ...
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Performance Analysis of Optical Spatial Modulation in Atmospheric Turbulence Channel
... the optical sources transmit at different peak ...average optical power constant, total emitted power is re-distributed by reducing the power of some TXs and assigning the surplus optical power to ...
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Demonstration of Compact Free-Space Optical MIMO Transmitter and Receiver Using Tri-Wavelength VCSELs and Silicon APDs
... the optical signal exhibited sharp edges, delivering a nearly ideal square ...input optical power strongly affected the performance of the ...Uniphase optical attenuator to a multimode fiber probe. ...
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DP DQPSK Optical Access System Integrated with Fiber and Free Space Downlink for High Spectral Efficiency Application
... After optical amplification, 10 Gb/s DP-DQPSK signals are input FSO transmission ...telescope, free space link and receiver ...The free space link distance between the transmitter and ...
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Comparison of wavelength propagation for free space optical communications
... “Wireless Optical transmission of fast Ethernet, FDDI, ATM and ESCON protocol data using the TeraLink laser communication system”, Optical Engineering, Dec 1998, ...
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