Performance of diversity combining techniques for FSO-MIMO system

Johnsi, A. Arokiamarie; Saminadan, V.

doi:10.1109/iccsp.2013.6577100

Cited by 11 publications

(27 citation statements)

References 8 publications

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“…Spatial diversity techniques, extensively studied in conventional RF communication systems [16], can also be applied in FSO systems to improve system performance. Multiple-input multiple-output (MIMO) FSO system can achieve significant diversity gain in the presence of atmospheric fading by deploying multiple transmit or receiver apertures [7,17]. Cooperative diversity technique [18,19,20] is also a cost-effective alternative to maintain system performance.…”

Section: Related Workmentioning

confidence: 99%

Optical power allocation for adaptive transmissions in wavelength-division multiplexing free space optical networks

Zhou

Mao

Agrawal

2015

Digital Communications and Networks

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Attracting increasing attention in recent years, the Free Space Optics (FSO) technology has been recognized as a costeffective wireless access technology for multi-Gigabit rate wireless networks. Radio on Free Space Optics (RoFSO) provides a new approach to support various bandwidth-intensive wireless services in an optical wireless link. In an RoFSO system using wavelength-division multiplexing (WDM), it is possible to concurrently transmit multiple data streams consisting of various wireless services at very high rate. In this paper, we investigate the problem of optical power allocation under power budget and eye safety constraints for adaptive WDM transmission in RoFSO networks. We develop power allocation schemes for adaptive WDM transmissions to combat the effect of weather turbulence on RoFSO links. Simulation results show that WDM RoFSO can support high data rates even over long distance or under bad weather conditions with an adequate system design.

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Section: Related Workmentioning

confidence: 99%

Optical power allocation for adaptive transmissions in wavelength-division multiplexing free space optical networks

Zhou

Mao

Agrawal

2015

Digital Communications and Networks

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“…with GG atmospheric turbulence, that is,˛`D˛,ˇ`Dˇ, and `D ,`D 1; 2; : : : ; N s N d . Using the series representation of K v .x/ [25, 9.6.2 and 9.6.10] in (10), and evaluating the integral in (11) for N ! 1, we obtain P e ¹´a !´bº / N Lmin.˛=2;ˇ=2/ ; (14) where N is the average SNR of a link.…”

Section: Diversity and Coding Gain Analysismentioning

confidence: 99%

“…It has been shown in [9,10] that the use of MIMO technology in free-space optical (FSO) systems has the potential to achieve spatial diversity, which is an attractive fading mitigation technique resulting in performance enhancement. The threshold diversity combining technique for FSO-MIMO system is proposed in [11], and the error performance is analyzed. The performance analysis of FSO-MIMO system utilizing intensity modulation/direct detection (IM/DD) under gamma-gamma (GG) fading distribution is observed in [12].…”

Section: Introductionmentioning

confidence: 99%

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Generalized OSTBC‐based subcarrier intensity‐modulated MIMO optical wireless communication system

Sharma

Bansal

Garg

2016

Int J Communication

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In this paper, we analyze an optical wireless communication (OWC) system having a source and a destination node, equipped with multiple transmit and receive apertures, respectively. We utilize generalized orthogonal space-time block codes (OSTBCs) of any arbitrary order and subcarrier intensity modulation scheme for data transmission over gamma-gamma (GG) fading optical links using M -ary phase-shift keying (PSK) constellation. A symbol-wise decoding is utilized, and the closed-form expression of the approximate average symbol error rate (SER) of multi-aperture-based OWC system is obtained for the generalized OSTBC and an arbitrary M -PSK constellation. Using the derived SER expression, we analytically evaluate the diversity order and the coding gain of the OWC system with GG atmospheric turbulence. It has been shown by the numerical results that the maximum possible diversity is achieved by using the symbol-wise maximum likelihood decoding in the destination.

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“…They showed that the use of multiple receive antennas in combination with adequate signal combining can improve the reliability of communication system even under poor SNR [4] . A. Arokiamarie Johnsi, V. Saminadan proposed diversity combining techniques in Free space Optical (FSO) communication system to mitigate the harmful effect of atmospheric turbulence [5] . Sari khatalin, John Fonseka derived closed form expressions for the capacity of dual branch maximum ratio combining, equal gain combining, selection combining and switching and stay combining over correlated Nakagami-m fading channels [6] .…”

Section: Introductionmentioning

confidence: 99%