Performance Comparison of OFDM based FSO Communication System under Log-normal and Gamma-Gamma Distribution
-
M. Selvi
and
K. Murugesan
Abstract
Recently, researches on Orthogonal Frequency Division Multiplexing (OFDM) based Free Space Optics (FSO) communication system gain interest since it combines the advantages of both techniques by mitigating the multipath propagation effects to improve the transmission data rate. The performance of such systems depends on base band modulation used, number of subcarriers, turbulence modeling, nature of laser beam and so on. In this paper, a performance comparison is carried out considering three different levels (weak, medium and strong) of atmospheric turbulence with log-normal and Gamma- Gamma scintillation model for plane, spherical and Gaussian beams. The Gamma-Gamma distribution analysis shows that for all kinds of laser beams, Bit Error Rate (BER) is high for weak turbulence which decreases further for medium and strong. The only difference is that the BER variation for Gamma-Gamma distribution with Gaussian beam is more prominent than for plane beam. The decrease in BER is clearly observed at higher SNR value. This kind of improvement in BER is observed with log-normal PDF at low SNR with weak turbulence. Thus we can say that weak atmospheric turbulence can be modeled by log-normal PDF and medium to strong condition can be modeled by Gamma-Gamma PDF.
©2014 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Frontmatter
- Amplifiers
- Transmission Properties of Passive Optical Network using Hybrid Raman Amplifiers
- Devices
- Design and Simulation of Four-channel Wavelength Demultiplexer Based on Photonic Crystal Circular Ring Resonators for Optical Communications
- Fibers
- Simple Method for Prediction of Far-Field Patterns of Single-mode Dispersion-shifted and Dispersion-flattened Fibers
- Networks
- In-band Bidirectional Optical Network Based on OCDMA Technique
- DAART: Delay-aware Adaptive Round Time MAC Protocol to Improve Throughput in Light-trail Networks
- Performance Analysis of Hybrid OCDMA/WDM System for Metro Area Network
- Systems
- Impact of Various Weather Condition on the Performance of Free Space Optical Communication System
- Performance Comparison of OFDM based FSO Communication System under Log-normal and Gamma-Gamma Distribution
- Phase Noise Influence in Coherent Optical DnPSK Systems with DSP based Dispersion Compensation
- 10 Gbit/s Bidirectional Long Reach WDM-PON using Externally Modulated Laser for Downlink and RSOA for Uplink with Dispersion Compensating FBG
- Novel Colorless WDM-PON Featuring Optional Broadcast Service and High Reliability
- Theory
- Laser Diode to Single-mode Circular Core Dispersion-shifted/Dispersion-flattened Fiber Excitation via Hemispherical Microlens on the Tip of the Fiber: Evaluation of Coupling Efficiency by ABCD Matrix Formalism
Articles in the same Issue
- Frontmatter
- Amplifiers
- Transmission Properties of Passive Optical Network using Hybrid Raman Amplifiers
- Devices
- Design and Simulation of Four-channel Wavelength Demultiplexer Based on Photonic Crystal Circular Ring Resonators for Optical Communications
- Fibers
- Simple Method for Prediction of Far-Field Patterns of Single-mode Dispersion-shifted and Dispersion-flattened Fibers
- Networks
- In-band Bidirectional Optical Network Based on OCDMA Technique
- DAART: Delay-aware Adaptive Round Time MAC Protocol to Improve Throughput in Light-trail Networks
- Performance Analysis of Hybrid OCDMA/WDM System for Metro Area Network
- Systems
- Impact of Various Weather Condition on the Performance of Free Space Optical Communication System
- Performance Comparison of OFDM based FSO Communication System under Log-normal and Gamma-Gamma Distribution
- Phase Noise Influence in Coherent Optical DnPSK Systems with DSP based Dispersion Compensation
- 10 Gbit/s Bidirectional Long Reach WDM-PON using Externally Modulated Laser for Downlink and RSOA for Uplink with Dispersion Compensating FBG
- Novel Colorless WDM-PON Featuring Optional Broadcast Service and High Reliability
- Theory
- Laser Diode to Single-mode Circular Core Dispersion-shifted/Dispersion-flattened Fiber Excitation via Hemispherical Microlens on the Tip of the Fiber: Evaluation of Coupling Efficiency by ABCD Matrix Formalism
