Performance Analysis Of Different Modulation Techniques In SIM Based FSO Using Different Receivers Over Turbulent Channel

Mishra, Arpita; Giri, Rajat Kumar

doi:10.1109/ic3iot.2018.8668104

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…Similar to the previous computations of the BER expressions of RZ-OOK and BPSK modulated signals, substituting Equations ( 53), ( 59)- (64), and (80) into Equation (56) gives:…”

Section: Weak Atmospheric Turbulencementioning

confidence: 83%

“…The conditional BER for BPSK SISO FSOC links in the absence of atmospheric turbulence is presented in [57,64] as:…”

Section: Binary Phase Shift Keying (Bpsk) Fsoc Linksmentioning

confidence: 99%

“…In order to obtain a BER of 10 −2 over a link distance of 2 km for FSOC links in all the cities investigated, receive SNRs of ~84 and ~81 dB are required based on the finite inner and finite outer scale model in Figures 6a and 7a, respectively. The BPSK FSOC links investigated in Figure 7a-d generally outperform the OOK FSOC links in Figure 6a-d The conditional probability of error for M-ary square SIM-QAM signals in the absence of atmospheric turbulence as derived in [64,66] is given as:…”

Section: Moderate To Strong Atmospheric Turbulencementioning

confidence: 99%

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Analysis of Scintillation Effects on Free Space Optical Communication Links in South Africa

2022

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The performance of free space optical communication (FSOC) systems is severely degraded by certain atmospheric conditions prevalent in places where they are deployed, in spite of their numerous advantages. In clear weather conditions, the random fluctuation in the atmosphere’s refractive index causes substantial scintillation losses to transmitted optical signals. It is therefore imperative to estimate the potential losses due to atmospheric turbulence in locations where FSOC links are to be deployed. This will provide the necessary fade margin for FSOC systems so that designed links withstand such atmospheric disturbances. In this paper, statistical analysis of wind speed data collected for various cities of South Africa is used for calculating the corresponding refractive index structure parameter (Cn2). These Cn2 values, as well as the zero inner scale and infinite outer scale model and finite inner and finite outer scale model, are used in computing the scintillation indices not exceeding 50%, 99%, 99.9%, and 99.99% of the time for the investigated locations. The Lognormal and Gamma–gamma distribution models are then employed for the computational analysis of the irradiance fluctuations and channel characteristics while considering the effect of pointing errors for weak and moderate to strong turbulence regimes. Finally, derived mathematical expressions for outage probabilities and bit error rate (BER) performances for FSOC links, employing various intensity modulation and direct detection (IM/DD) schemes, are presented.

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“…Similar to the previous computations of the BER expressions of RZ-OOK and BPSK modulated signals, substituting Equations ( 53), ( 59)- (64), and (80) into Equation (56) gives:…”

Section: Weak Atmospheric Turbulencementioning

confidence: 83%

“…The conditional BER for BPSK SISO FSOC links in the absence of atmospheric turbulence is presented in [57,64] as:…”

Section: Binary Phase Shift Keying (Bpsk) Fsoc Linksmentioning

confidence: 99%

Section: Moderate To Strong Atmospheric Turbulencementioning

confidence: 99%

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Analysis of Scintillation Effects on Free Space Optical Communication Links in South Africa

2022

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Performance analysis of radio-over-free-space optical communication system with spatial diversity over combined channel model

Kumar

Krishnan

2022

Opt Quant Electron

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Performance Analysis Of Different Modulation Techniques In SIM Based FSO Using Different Receivers Over Turbulent Channel

Cited by 2 publications

References 9 publications

Analysis of Scintillation Effects on Free Space Optical Communication Links in South Africa

Analysis of Scintillation Effects on Free Space Optical Communication Links in South Africa

Performance analysis of radio-over-free-space optical communication system with spatial diversity over combined channel model

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