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Performance of relay-assisted free-space optical CDMA systems over log-normal atmospheric turbulence channels
- Source :
- CSNDSP
- Publication Year :
- 2014
- Publisher :
- IEEE, 2014.
-
Abstract
- In this paper, we propose to use relay transmission as a powerful technique for performance improvement of free-space optical code-division multiple-access (FSO/CDMA) systems. Relay nodes are based on chip detect-and-forward to avoid decoding process that makes the relay nodes more complex. We formulate a closed-form expression for bit-error rate (BER) of proposed FSO/CDMA systems over log-normal atmospheric turbulence channels taking into account channel loss due to attenuation and beam divergence. Multiple-access interference and background noise are also considered in our analysis. The numerical results show that the relay transmission is an efficient solution to improve the system performance. Thanks to this solution, FSO systems can achieve low BER, long distance, and high data rate. In addition, the advantages of using two-dimensional (2-D) prime code over 1-D one are also investigated in this paper.
- Subjects :
- business.industry
Code division multiple access
Computer science
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Data_CODINGANDINFORMATIONTHEORY
Interference (wave propagation)
law.invention
Background noise
Relay
law
Computer Science::Networking and Internet Architecture
Electronic engineering
Bit error rate
Telecommunications
business
Relay channel
Decoding methods
Computer Science::Information Theory
Communication channel
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- 2014 9th International Symposium on Communication Systems, Networks & Digital Sign (CSNDSP)
- Accession number :
- edsair.doi...........75627bf252c36a964a1192ea182960d0
- Full Text :
- https://doi.org/10.1109/csndsp.2014.6923849