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- Title
Improving the performance of free space optical systems: a space-time orthogonal frequency division modulation approach.
- Authors
Ojo, Adedayo Olukayode; Owolabi, Isreal Esan; Onibonoje, Moses Oluwafemi
- Abstract
Free space optical (FSO) communication systems are known for high-level capacity and information security. The overall system performances of FSO systems are however significantly affected by atmospheric turbulence induced fading. This paper, therefore, proposes a space-time code (STC) technique to mitigate this effect through the introduction of an additional degree of error correction capacity by exploiting the spectral dimension in the coding space. A space-time trellis coded orthogonal frequency division modulation (OFDM) scheme was developed, simulated and evaluated for free space optical communication through a gamma-gamma channel. The evaluation of the coding gain obtained from the simulation results, the mathematical analysis and the truncation error analysis shows that the proposed technique is a promising and viable technique for improving the error correction performance on optical communication links.
- Subjects
ORTHOGONAL systems; FREE-space optical technology; SPACE-time codes; ATMOSPHERIC turbulence; OPTICAL communications
- Publication
International Journal of Electrical & Computer Engineering (2088-8708), 2023, Vol 13, Issue 6, p6435
- ISSN
2088-8708
- Publication type
Article
- DOI
10.11591/ijece.v13i6.pp6435-6442