A RoF-FSO communication system using 10Gbit/s polsk 4-PAM downstream signals

Abstract

In this paper, the performance of a 60 GHz radio over fiber free space optics (RoF-FSO) communication system with 10Gbit/s 4-ary pulse amplitude modulation (4-PAM) polarization shift-keying (Polsk) downlink signal is proposed and designed. In the receiver, the 60GHz millimeter-wave with 4-PAM downstream signals is generated by the beating of two continuous light waves, and the high frequency signal is demodulated by self-mixing zero difference detection method. Meanwhile, the optical spectra, radio frequency (RF) spectrum, eye-diagram are measured, and the transmission performance of the used RoF-FSO system are analyzed.

A novel dual polarization multiplexing RoF system integrating optical fiber and FSO channel with AMI downlink signals

“…In some complex terrain areas, such as mountains and rivers, it is difficult to install communication cables underground, especially for optical fiber cables [ 7 ]. Some wireless devices can be used to achieve information transmission in areas where it is not easy to lay optical fiber [ 8 ], while wired links are used to communicate between remote areas and cities [ 9 , 10 ]. Hence, a novel RoF system integrating optical Fiber and FSO channel is designed in this paper, and polarization multiplexing technology is also introduced, since it can improve frequency spectrum utilization and double transmission capacity [ 11 , 12 ].…”

A Novel RoF System Integrating Optical Fiber and FSO Channel with Polarization Multiplexing PAM4 Downlink Signals

“…Hence, this system has become a promising alternative scheme in broadband wireless access systems in the future, and has attracted extensive attention from the academic community [9,10]. The polarization multiplexing system has simple structure, which can double the transmission capacity and increase the frequency spectrum utilization [11,12]. To further improve the transmission capacity of broadband access systems, the polarization multiplexing technology combined with the 4-ary pulse amplitude modulation (PAM4) technology is also be introduced to achieve higher frequency band utilization and higher transmission rate [13].In this paper, a novel radio over ber free space optics (RoF-FSO) communication system with 10Gbit/s polarization multiplexing PAM4 downlink signals is introduced and discussed.…”