BER performance analysis of radio over free-space optical systems considering laser phase noise under Gamma-Gamma turbulence channels

Lim, Wansu; Yun, Changho; Kim, Kiseon

doi:10.1364/oe.17.004479

Cited by 30 publications

(10 citation statements)

References 8 publications

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“…Recently, the use of FSO transmission is being specially interesting to solve the "last mile" problem, as well as a supplement to radio-frequency (RF) links [2,3]. However, atmospheric turbulence produces fluctuations in the irradiance of the transmitted optical beam, which is known as atmospheric scintillation, severely degrading the link performance [4,5].…”

Section: Introductionmentioning

confidence: 99%

Bit detect and forward relaying for FSO links using equal gain combining over gamma-gamma atmospheric turbulence channels with pointing errors

García-Zambrana

Castillo-Vázquez

et al. 2012

Opt. Express

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An unsuitable alignment between transmitter and receiver together with fluctuations in the irradiance of the transmitted optical beam due to the atmospheric turbulence can severely degrade the performance of free-space optical (FSO) systems. In this paper, cooperative FSO communications with decode-and-forward (DF) relaying and equal gain combining (EGC) reception over atmospheric turbulence and misalignment fading channels is analyzed in order to mitigate these impairments. Novel closed-form asymptotic bit error-rate (BER) expressions are derived for a 3-way FSO communication setup when the irradiance of the transmitted optical beam is susceptible to either a wide range of turbulence conditions (weak to strong), following a gamma-gamma distribution of parameters α and β , or pointing errors, following a misalignment fading model where the effect of beam width, detector size and jitter variance is considered. Obtained results provide significant insight into the impact of various system and channel parameters, showing that the diversity order is independent of the pointing error when the equivalent beam radius at the receiver is at least 2β 1/2 times the value of the pointing error displacement standard deviation at the receiver. It is contrasted that the available diversity order is strongly dependent on the relay location, achieving greater diversity gains when the diversity order is determined by β AC + β BC , where β AC and β BC are parameters corresponding to the turbulence of the source-destination and relay-destination links. Simulation results are further demonstrated to confirm the accuracy and usefulness of the derived results. site," URL http://functions.wolfram.com. 36. V. S. Adamchik and O. I. Marichev, "The algorithm for calculating integrals of hypergeometric type functions and its realization in REDUCE system," in Proc. Int. Conf. on Symbolic and Algebraic Computation, 212-224 (Tokyo, Japan, 1990).

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Section: Introductionmentioning

confidence: 99%

Bit detect and forward relaying for FSO links using equal gain combining over gamma-gamma atmospheric turbulence channels with pointing errors

García-Zambrana

Castillo-Vázquez

et al. 2012

Opt. Express

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“…p(e|0) and p(e|1)are the conditional probability in the case of sending 0 and 1. The average bit error rate (BER)can be described as , Q()is the Gaussian-Q function, substituting (1) and  () erfc the average BER is represented as: erfc  will be expressed as follows [12]:…”

Section: Ber Under Atmospheric Turbulencementioning

confidence: 99%

Performance Analysis of Different Modulation Techniques for Free-Space Optical Communication System

Zhang

Xiao

et al. 2015

TELKOMNIKA

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“…For different atmospheric turbulence intensity, in recent years, a number of statistical models have been introduced. For example, lognormal, gamma-gamma, and negative exponential models are the most commonly used for the cases of weak-to-moderate, moderate-to-strong, and saturated turbulence channels, respectively [7]- [12]. To overcome the challenges of atmospheric turbulence, one of the main factors in the implementation of high performance FSO systems is the modulation technique.…”

Section: Introductionmentioning

confidence: 99%

BER Analysis of a Hybrid Modulation Scheme Based on PPM and MSK Subcarrier Intensity Modulation

et al. 2015

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In order to improve the bit-error-rate (BER) performance of free-space optical (FSO) communication systems employing binary phase-shift keying subcarrier intensity modulation (BPSK-SIM), an innovative hybrid modulation scheme called PPM-MSK-SIM is proposed, which is based on pulse position modulation (PPM) and minimum shift keying (MSK) subcarrier intensity modulation. Subsequently, the BER performance of PPM-MSK-SIM is studied in detail for an FSO system over log-normal turbulence channels with avalanche photodiode detection. The results of the numerical simulation show that PPM-MSK-SIM has the advantages of improving the BER performance compared with BPSK-SIM and PPM. For example, at the same received irradiance of À2.1 dBm and the same strength of turbulence C 2 n ¼ 7:5 Â 10 À15 m À2=3 , the BER performance of 2-PPM-MSK-SIM can decrease to 1:02 Â 10 À9 , whereas those of 2-PPM and BPSK-SIM are just 1:19 Â 10 À7 and 2:29 Â 10 À6 , respectively. This makes PPM-MSK-SIM a favorable candidate for the modulation technique in FSO communication systems.Index Terms: Free-space optical communication, subcarrier intensity modulation, atmospheric turbulence, atmospheric attenuation, bit-error rate (BER).

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BER performance analysis of radio over free-space optical systems considering laser phase noise under Gamma-Gamma turbulence channels

Cited by 30 publications

References 8 publications

Bit detect and forward relaying for FSO links using equal gain combining over gamma-gamma atmospheric turbulence channels with pointing errors

Bit detect and forward relaying for FSO links using equal gain combining over gamma-gamma atmospheric turbulence channels with pointing errors

Performance Analysis of Different Modulation Techniques for Free-Space Optical Communication System

BER Analysis of a Hybrid Modulation Scheme Based on PPM and MSK Subcarrier Intensity Modulation

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