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- W3206572458 abstract "An expository methodology is introduced to assess the CNR and BER performance of a STBC OFDM FSO framework over turbulent channel. Expressions are developed for conditional CNR and BER for a given turbulence induced fading. Average BER is then found considering the pdf of turbulence induced fading of gamma-gamma distribution. Results are evaluated for 2 × 2 Alamouti STBC OFDM FSO communication system over turbulent atmospheric channel for several values of system parameters viz. number of OFDM subcarriers, turbulence variance, link distance, data rate and power penalty suffered by the system due to atmospheric turbulence. The results show that the BER performance is strongly degraded due to the effect of atmospheric turbulence. Systems suffers significant amount of power penalty in receiver sensitivity at a given BER. However, the power penalty can be reduced by increasing the number of OFDM subcarriers. For example, power penalty at a BER of10−9 for 2 × 2 STBC with N = 16 OFDM subcarriers is found to be 5.5 dB and the power penalty reduces to 0.35 dB when N is increased to 64." @default.
- W3206572458 created "2021-10-25" @default.
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- W3206572458 date "2021-12-01" @default.
- W3206572458 modified "2023-10-12" @default.
- W3206572458 title "Analytical performance evaluation of a 2 × 2 Alamouti STBC OFDM FSO- communication system over turbulent atmospheric channel" @default.
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- W3206572458 doi "https://doi.org/10.1016/j.ijleo.2021.168124" @default.
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