Performance study of serial-parallel combined relay orthogonal frequency division multiplexing free space optical system based on M distribution model

2019 ◽  
Vol 58 (10) ◽  
pp. 1 ◽  
Author(s):  
Yi Wang ◽  
Hao Wu
Keyword(s):  
Optical System ◽  
Free Space ◽  
Orthogonal Frequency Division Multiplexing ◽  
Distribution Model ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Free Space Optical ◽  
Performance Study

Performance of orthogonal frequency division multiplexing based 60-GHz transmission over turbulent free-space optical link

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Abhishek Tripathi ◽  
Shilpi Gupta ◽  
Abhilash Mandloi
Keyword(s):  
Free Space ◽  
Orthogonal Frequency Division Multiplexing ◽  
Symbol Error Rate ◽  
Frequency Division Multiplexing ◽  
60 Ghz ◽  
Frequency Division ◽  
Free Space Optical ◽  
Error Vector Magnitude ◽  
Free Space Optic ◽  
Space Range

Abstract In this paper, radio-over-free-space optic (RoFSO) transmission is investigated for the next-generation wireless networks. Here, the 60 GHz based radio frequency (RF) system is demonstrated using 16-quadrature amplitude modulation with orthogonal frequency division multiplexing scheme. System performance for FSO link is evaluated by modeling the channel with the gamma-gamma fading. The optical spectrum and constellation diagram of the received signals are analyzed. The improvement reported for error vector magnitude is 3.8–0.6% and symbol error rate of 0.03–0.005 for free-space range of 0.2–1 km. Proposed work claims that orthogonal frequency division multiplexing can be helpful for the FSO systems by providing robustness to adverse atmospheric turbulence.

A long-reach radio over free space optics (Ro-FSO) system using hybrid orthogonal frequency division multiplexing (OFDM)-multibeam concept with enhanced detection

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Peramandai Govindasamy Kuppusamy ◽  
Kotteswaran Rajkumar ◽  
Rajagopal Maheswar ◽  
Soundarapandian Sheeba Rani ◽  
Iraj Sadegh Amiri
Keyword(s):  
Free Space ◽  
Orthogonal Frequency Division Multiplexing ◽  
Free Space Optics ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Detection Mechanism ◽  
Space Optics ◽  
Modulation Format ◽  
Single Sideband Modulation ◽  
Improved Performance

AbstractThis paper focuses on designing of a 10 Gbit/s-10GHz hybrid Orthogonal frequency division multiplexing (FDM) based Radio over Free Space Optics (Ro-FSO) transmission link using optical single sideband modulation format and its performance has been compared using a different number of transmission beams. The proposed link has been simulated and compared using 1-beam, 2-beam, and 4-beam in the system. We show that by using the 4-beam system in the OFDM-Ro-FSO link, a 3000 m range has been achieved reliably, which a notable improvement when compared to previous work is. Also, we show an improved performance of the system by using an enhanced detection mechanism using a Square root module (SRm) at the receiver side.

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