Capacity of Optical Wireless System over Log-Normal Channels with Spatial Diversity in Presence of Atmospheric Losses
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Rahul Kaushik
,
Vineet Khandelwal
Abstract
In this paper, average channel capacity of optical wireless communication system is evaluated under the combined effect of geometrical loss, attenuation due to weather conditions and weak atmospheric turbulence using a simple closed form expression. Fading induced due to atmospheric turbulence is modeled by log-normal distribution. Considering the fact that the sum of log-normal random variables can be well approximated by another log-normal random variable, the proposed expression has been utilized to compute the channel capacity for spatial diversity reception employing maximum ratio combining and equal gain combining over uncorrelated turbulence-induced fading conditions. It is shown that spatial diversity is an effective technique to mitigate the impairments caused by various atmospheric conditions such as haze, rain and fog. The quantitative improvement in channel capacity achieved by using diversity techniques is investigated and compared. Accuracy of the results is validated with exact results computed using Monte Carlo simulation.
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Articles in the same Issue
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- A Performance Analysis of Free-Space Optical Link at 1,550 nm, 850 nm, 650 nm and 532 nm Optical Wavelengths
- Performance Investigation of Different Modulation Schemes in RoF Systems under the Influence of Self Phase Modulation
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- A New Construction of Optical Zero-Correlation Zone Codes
Articles in the same Issue
- Frontmatter
- A Review on Hybrid Optical Amplifiers
- Multi-stage Mirror-Based Planar Structure for Wavelength Division Demultiplexing
- Low Loss and High-Quality Factor Optical Filter Using Photonic Crystal-Based Resonant Cavity
- All Optical High Speed Multiplexer Circuit for Verification of Proposed Gates
- Structural and Optical Properties of Nanophotonic LiNbO3 under Stirrer Time Effect
- Passively Q-switched Erbium-Doped Fiber Laser based on Graphene Oxide as Saturable Absorber
- A Method of Optical Grooming Based on Dynamic Multicast Capable of Adaptive Splitting Under Differential Delay Constraint
- A Novel Spectrum Assignment Scheme for Time-Varying Traffic in Flexgrid Optical Networks
- A QoS Control Scheme based on Software Defined Fiber-Wireless Access Network for Survivability
- A Performance Analysis of Free-Space Optical Link at 1,550 nm, 850 nm, 650 nm and 532 nm Optical Wavelengths
- Performance Investigation of Different Modulation Schemes in RoF Systems under the Influence of Self Phase Modulation
- Capacity of Optical Wireless System over Log-Normal Channels with Spatial Diversity in Presence of Atmospheric Losses
- A New Construction of Optical Zero-Correlation Zone Codes
