A full duplex ultrawideband over free‐space optics architecture based on polarization multiplexing and wavelength reuse

2020 ◽  
Vol 62 (12) ◽  
pp. 3999-4006 ◽  
Author(s):  
Jawad Mirza ◽  
Salman Ghafoor ◽  
Ashiq Hussain
Keyword(s):  
Free Space ◽  
Full Duplex ◽  
Free Space Optics ◽  
Space Optics ◽  
Wavelength Reuse ◽  
Polarization Multiplexing

Hybrid Analog/Digital Modulations Using Polarization Multiplexing OCDMA Scheme in Free Space Optics

2015 ◽  
Vol 764-765 ◽  
pp. 511-514
Author(s):  
Chih Ta Yen ◽  
Chia Yu Liu
Keyword(s):  
Free Space ◽  
Orthogonal Frequency Division Multiplexing ◽  
Multiple Access ◽  
High Speed ◽  
Base Station ◽  
Free Space Optics ◽  
Detection Scheme ◽  
Space Optics ◽  
Polarization Multiplexing ◽  
Code Division Multiple

With the development of the Internet, how to provide a high-speed and high-security comprehensive network has become urgent issue. In this project, we propose hybrid analog/digital transmissions format scheme which integrated optical code-division multiple-access (OCDMA) and polarization multiplexing technique in free space optics (FSO) transmission. Orthogonal frequency division multiplexing (OFDM) transmits as the analog format and (on-off keying) OOK transmits as digital format in the study, respectively. In the proposed hybrid OCDMA system, it has high-speed transmission, signal security and low cost...etc. we adopt quasi-orthogonal Walsh-Hadamard codes (WHC) that with fixed cross correlation value as the codeword for each base station. With the property, the multiple access interference (MAI) can be efficiently eliminated by using the balanced detection scheme at the receive end. The constellation and eye diagrams show that both OFDM signal as analog signal and OOK modulation as digital signal in the proposed hybrid OCDMA system perform good performance in FSO transmission.

scholarly journals A Survey of Free Space Optics (FSO) Communication Systems, Links, and Networks

IEEE Access ◽  
2020 ◽  
pp. 1-1
Author(s):  
Samir A. Al-Gailani ◽  
Mohd Fadzli Mohd Salleh ◽  
Ali A. Salem ◽  
Redhwan Q. Shaddad ◽  
Usman Ullah Sheikh ◽  
...  
Keyword(s):  
Free Space ◽  
Communication Systems ◽  
Free Space Optics ◽  
Space Optics

Self restorable intra data center interconnect based on multimode fiber and free-space optics

2021 ◽  
Vol 60 (03) ◽  
Author(s):  
Jawad Mirza ◽  
Aadil Raza ◽  
Ahmad Atieh ◽  
Saeed Iqbal ◽  
Salman Ghafoor
Keyword(s):  
Data Center ◽  
Free Space ◽  
Free Space Optics ◽  
Multimode Fiber ◽  
Space Optics
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