The integration of optical and wireless networks increases mobility and capacity and decreases costs in access networks. Fibre optic communication can be considered optical communication that combines the methodologies of two communications, and it may be utilised in systems of wired and wireless communication. The solution for many problems is radio over fibre (RoF) because it can control many base stations (BS) that are connected to a central station (CS) with an optical fibre. The received RoF signal head for in a low quality; thus, many factors will result in some problems such as a high bit error rate (BER) and low Q-factor values, and the receiver might not be operating in a high data rate network. Wavelength division multiplexing (WDM) network can offer a solution to these problems where the transmission of different signals can be done with a single-mode fibre. BER should be reduced to assured values, and the Q-factor must be increased. The investigation of WDM-RoF with different lengths of fibre at various channel spacing will be simulated using Optisystem software, and the RoF’s receiver performance is measured and analyzed depending on the acquired BER, the value of the Q-factor, and the height of the opening of the eye diagram. The degradation factors effect such as attenuation and dispersion are significantly limited with the addition of an EDFA amplifier to a Single Mode Fibre (SMF).

https://www.mdpi.com/2079-6439/7/3/19/pdf

Design and Performance Analysis of the WDM Schemes for Radio over Fiber System With Different Fiber Propagation Losses

With the advancement in the technology, the needs of the users are also growing. The demand for higher bandwidth is one of these requirements. In order to fulfill this, Fiber Optic communication is developed. It transfers the data in the form of light waves and also achieves higher data transmission rate by facilitating the wider bandwidth for transmission. This mode of communication uses various encoding schemes such as NRZ and various communication channels to improve the quality of communication. The implementation is done by using optisystem. The various encoding schemes are implemented with three different communication channels. It is observed that MDRZ outnumber rest of the encoding scheme with respect to the value of BER and Q. Factor.

/pdf/comparison-of-mdrz-csrz-and-drz-schemes-using-different-4sdq1qak81.pdf

Comparison of MDRZ, CSRZ and DRZ schemes using different Communiation Channels

Inter-satellite optical-wireless communication systems (IsOWC), one of the important applications of FSO/WSO technology, will be deployed in space in the near future. The IsOWC systems provide a high bandwidth, small size, light weight, low power and low cost alternative to present microwave satellite systems. In this paper we have reported the challenges of IsOWC

https://www.ijraset.com/fileserve.php?FID=9349

Study of Various Challenges In IS-OWC – A Review

The full form of RoF is Radio over Frequency technology. Present generation is the era of the network. Thus, the entire information interchanges over the network and the data traffic may occur on the network due to excessive data being transferred. Radio over Frequency is a technique that offers access to the bandwidth of channel. Hence, it is utilized to regulate traffic over the network in the condition of wireless networks. In this paper, mainly attention on communication channels such as ophthalmic wireless communication (OWC) and free space optics (FSO). Multiple encoding formats such as NRZ, CS-RZ, DRZ, and MDRZ are also discussed in this paper to transmit information along with modulation signals

https://www.ijcaonline.org/archives/volume171/number5/sharma-2017-ijca-915033.pdf

Study of Radio over Fiber with Different Coding Channel – A Review

\n In this paper, the bit error rate (BER) performance of Duobinary (DB) is compared with carrier-suppressed return-to-zero (CSRZ) based polarization interleaving (PI) schemes for high-speed transmission system. The system is integrated with wavelength-division multiplexing (WDM) scheme and PI scheme for free space optical communications (FSO). The simulation results show that DB offers betters BER performance compared to CSRZ in high-speed WDM-FSO-PI system.

Performance Analysis of Duobinary and CSRZ Modulation Based Polarization Interleaving for High-Speed WDM-FSO Transmission System

With the increase in the technology of networks and the internet, the need of the users also increases. The requirement of high bandwidth, high data transmission rate etc increases. To fulfill this need the concept of fiber optic was developed. Fiber optic communication is optical communication which is the combination of two communication methodologies and can be used for both wired and wireless communication systems. This form of communication is used by the users from many years but still it requires some advancements and developments to make it more refine. The conventional systems designed for RoF technology comprises of various drawbacks such as limited number of users, unwanted frequencies in the signals and quality of the system. This paper provides a brief to the concept of fiber communication and various modulation schemes along with this the developments that had been done in this work are also define in related work section.

/pdf/comprehensive-study-of-radio-over-fiber-with-different-22yktokxlg.pdf

Savita Rana

Papers

Comprehensive Study of Radio over Fiber with different Modulation Techniques – A Review