New approximate and asymptotic closed-form expressions for the outage probability and the average BER of MIMO-FSO system with MRC diversity technique over Gamma–Gamma fading channels with generalized pointing errors

Ding, Junrong; Yu, Siyuan; Fu, Yulong; Ma, Jing; Tan, Liying

doi:10.1016/j.optcom.2019.124633

Cited by 17 publications

(13 citation statements)

References 28 publications

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“…Also, it is acknowledged that C 2 n typically varies from 10 −17 m −2/3 for weak turbulence to 10 −13 m −2/3 for strong turbulence. Specifically, when D ≥ ρ sp , where ρ sp = ð0:55C 2 n k 2 LÞ −3/5 is the spherical wave coherence radius [25], we need to consider the effect of aperture averaging on the FSO system performance. Furthermore, the relationship β > α consistently holds according to Figure 1.…”

Section: System and Channel Modelmentioning

confidence: 99%

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Parameter Estimation of Gamma‐Gamma Fading with Generalized Pointing Errors in FSO Systems

Miao

Cai

2021

Wireless Communications and Mobile Computing

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In this paper, the challenges of parameter estimation for the Gamma-Gamma turbulence channels with generalized pointing errors are addressed. The Kolmogorov-Smirnov goodness-of-fit statistical test results indicate that the approximate probability density function obtained by the saddlepoint approximation (SAP) method provides a better approximation for a larger value w z , and this means that the proposed method is more efficient for the FSO links over long distances when the transmit divergence angle at the transmitter side is fixed. Also, an additional parameter k needs to be estimated in addition to the shaping parameters α and β under the SAP method. An estimation scheme for the shaping parameters is proposed based on the SAP method. The performance of the proposed estimation is investigated by using the mean square error (MSE) and normalized mean square error (NMSE). The results indicate the proposed estimator exhibits satisfactory performance in both noiseless and noisy environments. The effects of the receiver aperture on the estimation performance are also discussed.

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Section: System and Channel Modelmentioning

confidence: 99%

“…Note that D = 0:1 m for all of the figures in Figure 2 and Table 1. Other system configuration parameters, such as L and λ, have been used in most practical terrestrial FSO systems [25,33]. These are shown in Section 4.…”

Section: Ks Goodness-of-fit Testsmentioning

confidence: 99%

Parameter Estimation of Gamma‐Gamma Fading with Generalized Pointing Errors in FSO Systems

Miao

Cai

2021

Wireless Communications and Mobile Computing

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“…Wavelength diversity refers to the use of different transmission wavelengths and these diverse subcarriers, while propagating through channels, undergo different levels of fading [39,40]. However, if the information received over different channels is combined at the receiver, the detection probability of correct information increases [37].…”

Section: Link Design Analyticsmentioning

confidence: 99%

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

et al. 2021

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Free-space optical (FSO) communication systems are being anticipated to offer promising alternatives to existing radio networks in delivering high-speed data access to end-users. Ease of installation, robust features, and cost-effective operation have been the hallmark of FSO systems, and these features will play an obvious role in deciding the ways in which futuristic smart communication models will operate. Despite these arrays of features, FSO links suffer severe performance degradation due to channel-induced impairments caused by atmospheric effects such as rain, haze, and fog. In this work, we have investigated and compared the performance of 40 Gbps FSO links for different channel conditions ranging from clear weather to severe attenuation by incorporating spatial and wavelength diversity as performance booster techniques. The use of an erbium-doped fiber amplifier (EDFA) with FSO links has also been proposed here. Using performance metrics like bit error rate (BER) and eye patterns, it has been found that the use of EDFA not only helps in compensating for the link losses but also aids in realizing an all-optical processing based last-mile access system. The proposed FSO system will be capable of bridging the existing backbone fiber networks with end-users with minimal changes to the existing hardware regime, thereby proving to be extremely cost-effective in sharp contrast to radio-frequency generations which require major infrastructure overhaul.

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“…65 Compared with the other two distribution models, GG distribution model is mostly used to investigate the FSO link behavior since it provides a superb fit to the experimental data over a large range of environmental turbulence conditions ranging from weak-to-strong. 66 Thus, in this proposed work to describe the attenuation fading gains h a over a large range of atmospheric turbulence scenarios GG fading distribution model is selected. The proposed design function for GG channel distribution is given as References 27,47.…”

Section: Atmospheric Turbulencementioning

confidence: 99%

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

Kumari

Sharma

Sheetal

2021

Trans Emerging Tel Tech

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Time and wavelength division multiplexing passive optical network (TWDM-PON) is adopted across the globe and is considered as the most remarkable trend of the next-generation solution to serve exponential traffic growth for fifth-generation (5G) network. In the interest of achieving 5G network requirements, we propose a mode division multiplexing (MDM) based bidirectional 40/40 Gbps hybrid TWDM-PON and free-space optics (FSO) system. The system performance is analyzed for bidirectional hybrid fiber/FSO channels incorporating four distinct Laguerre-Gaussian (LG00, LG01, LG11, and LG21) spatial modes for variable fiber (10-155 km)/FSO (10-1000 m) link ranges and different receiver aperture diameters (20 μm-60 cm). Based on Gamma-Gamma (GG) modeled FSO channels using Laguerre Gaussian modes, bit error rate (BER) performance of the system is numerically investigated under the impact of dynamic atmospheric weather conditions, weak-to-strong turbulence conditions, pointing errors, and geometric loss (GL) at an acceptable BER of 10 −9. In addition, to support the numerical analysis, the simulation results exhibit that the hybrid fiber/FSO LG00 signals over 1000 m FSO and 155 km fiber link ranges are successfully transmitted in the system with 40 μm spatial and 60 cm FSO receiver aperture diameters under the impact of strong turbulence, atmospheric attenuation of 0.2 dB/km and noise. Moreover, the performance comparison of the MDM-based hybrid TWDM-PON/FSO with the previous latest literature works reveals a superior system performance under practical environment conditions. The proposed work can be utilized to realize longreach, bandwidth-efficient, high-capacity, and high-speed data transmission links.

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New approximate and asymptotic closed-form expressions for the outage probability and the average BER of MIMO-FSO system with MRC diversity technique over Gamma–Gamma fading channels with generalized pointing errors

Cited by 17 publications

References 28 publications

Parameter Estimation of Gamma‐Gamma Fading with Generalized Pointing Errors in FSO Systems

Parameter Estimation of Gamma‐Gamma Fading with Generalized Pointing Errors in FSO Systems

Developing Cost-Effective and High-Speed 40 Gbps FSO Systems Incorporating Wavelength and Spatial Diversity Techniques

Performance analysis of long‐reach 40/40 Gbps mode division multiplexing‐based hybrid time and wavelength division multiplexing passive optical network/free‐space optics using Gamma‐Gamma fading model with pointing error under different weather conditions

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