BER Performance Analysis of an Orthogonal FDM Free Space Optical Communication System with Homodyne Optical Receiver over Turbulent Atmospheric Channel
-
Bobby Barua
and
S. P. Majumder
Abstract
Atmospheric turbulence induced fading may severely impair free-space optical (FSO) communication systems, affecting the quality of the propagated laser beam and lead to significant performance degradation. Recent research works reveal that performance can be improved by using orthogonal FDM. In this paper, an analytical approach is presented to evaluate the bit error rate performance of an OFDM FSO link with optical intensity modulation and coherent homodyne receiver taking into consideration the effect of strong atmospheric turbulence. The turbulence effect is modeled as gamma-gamma distribution and the performance results are evaluated in terms of average CNR and BER. Power penalty suffered by the system due to the effect of turbulence at a given BER is evaluated for several system parameters viz. link distance, turbulence parameter, local oscillator power etc. It is noticed that effect of turbulence can be significantly reduced by increasing the number of OFDM subcarrier. For example, power penalty for BER of 10–9 at a link distance of 3,600 m is 6 dB when number of subcarrier is 4 and can be reduced to 0.5 dB by increasing the number of subcarrier to 64. In addition, by utilizing coherent optical receiver and synchronous demodulation at the receiving end, we have introduced local oscillator (LO) for both Optical and RF state which have ability to track the signal’s phase changes over time relative to the LO’s phase and helps the system to remain stable.
Acknowledgements
The work is carried out as a part of Ph.D. dissertation in the Dept. of EEE, BUET. The authors would like to acknowledge with gratitude the support provides the Dept. of EEE, BUET.
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© 2019 Walter de Gruyter GmbH, Berlin/Boston
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Articles in the same Issue
- Frontmatter
- Amplifiers
- Effect of carrier (hole) temperature on performance of optical amplifiers quantum dot structure
- Devices
- 1 × 2 power splitter based on photonics crystals fibers
- Evolution of Adder and Subtractor Circuit Using Si3N4 Microring Resonator
- Fibers
- Different Photonic Crystal Fibers Configurations with the Key Solutions for the Optimization of Data Rates Transmission
- Networks
- Design and implementation of OLT switching function in 40/10G TDM-PON experimental system
- A parallel cross-connection recovery scheme for dual link failure in elastic optical networks
- A Brief Review on the Methods that Improve Optical Burst Switching Network Performance
- MBO-Based Bandwidth Allocation and Traffic Coloring Optimization in PON
- HMM-Based Secure Framework for Optical Fog Devices in the Optical Fog/Cloud Network
- Attack-Aware Dynamic Upstream Bandwidth Assignment Scheme for Passive Optical Network
- Systems
- 2 × 10 Gbit/s–10 GHz Radio over Free Space Optics Transmission System Incorporating Mode Division Multiplexing of Hermite Gaussian Modes
- Impact of Rayleigh-Distributed PAPR on the Performance of a Pre-Clipped DCO-OFDM System
- Suitability of FBG for Gain Flatness of 64 × 10 Gbps DWDM System Using Hybrid (EDFA+YDFA) Optical Amplifier in C + L Band up to 50 GHz (0.4 nm) Channel Spacing
- BER Performance Analysis of an Orthogonal FDM Free Space Optical Communication System with Homodyne Optical Receiver over Turbulent Atmospheric Channel
- Theory
- Numerical Analysis of Soliton Propagation in a Tapered Waveguide
- New Optical Codes Based on Construction of Parity Check Matrix of LDPC Codes
- Performance Analysis of 20 Gbit/s–40 GHz MDM-Ro-FSO Link Incorporating DPSK Modulation Scheme
