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MEHTAB SINGH1,* , JYOTEESH MALHOTRA1
The present work reports the designing and performance analysis of radio over free space optics transmission link by incorporating hybrid wavelength division multiplexing, mode division multiplexing, and orthogonal frequency division multiplexing techniques. Four independent information signals each carrying 20Gbit/s-40GHz data are transmitted using distinct Laguerre Gaussian (LG) modes and Hermite Gaussian (HG) modes (LG02, LG03, HG02, and HG03)over different atmospheric conditions. The proposed link performance is investigated under the impact of geometric losses and for varying climate conditions viz. clear, light fog, moderate fog, and heavy fog. Also, the impact of increasing size of optical beam (beam divergence) on the proposed link performance has been numerically investigated. The modal decomposition of different channels at the receiver terminal is also evaluated. Furthermore, to increase the maximum link range of the proposed link under adverse climate conditions, we have deployed a Square root module at the receiver end and the efficacy of the proposed detection technique is demonstrated.
WDM, MDM, OFDM, RoFSO, Atmospheric turbulences, Square root module.
MEHTAB SINGH, JYOTEESH MALHOTRA, 4×20Gbit/s-40GHzOFDM based Radio over FSO transmission link incorporating hybrid wavelength division multiplexing-mode division multiplexing of LG and HG modes with enhanced detection, Optoelectronics and Advanced Materials - Rapid Communications, 14, 5-6, May-June 2020, pp.233-243 (2020).
Submitted at: Dec. 30, 2018
Accepted at: June 16, 2020
Optoelectronics and Advanced Materials - Rapid Communications
(2022): 0.5 - 2022 Journal Citation Reports (Clarivate Analytics, 2023)
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