scholarly journals Analyzing the BER and optical fiber length performances in OFDM RoF links

2021 ◽  
Vol 23 (3) ◽  
pp. 1501
Author(s):  
Marwa M. Kareem ◽  
Sameer A. S. Lafta ◽  
Hadi Fakhir Hashim ◽  
Raed Khalid Al-Azzawi ◽  
Adnan Hussein Ali
Keyword(s):  
Optical Fiber ◽  
Orthogonal Frequency Division Multiplexing ◽  
Fiber Length ◽  
High Speed ◽  
Optical Network ◽  
Optical Modulators ◽  
Optical Amplification ◽  
Received Power ◽  
Rate Transmission ◽  
Radio Signals

Radio over fiber (RoF) can be assessed as a system of most convenient combination of optical fiber and radio signals. The technique of orthogonal frequency division multiplexing (OFDM) considers as a data distribution over a huge number of carriers having spaced from each other with specific frequencies at overlap bands. Hence incorporates OFDM with the optical fiber, OFDM-RoF system can be increased the modulation RF access capacity besides high-speed data transmission, it considers a broadband communication trend of the current and future applications specifically for 5G mobile. The optical network scenarios of various RF can be model with optisystem software, and OFDM in addition to use a section of the orthogonal multiplex frequency of 16-quadrature amplitude modulation (QAM) RF modulating signal. In the optical domain, Mach-Zehnder modulator (MZM) optical modulators are used to carry out different results with different fiber lengths. An OFDM-RoF wireless communication system considers as advanced data rate transmission achievement by minimum delays. The essential goal of this paper is for identifying the minimum bit error rate (BER) for the 16-QAM modulation with varying fiber length. The OFDM-RoF system can be able for realizing a fiber length 100 km with a restricted decreasing in the received power so that the constellation noise is became greater despite of applying electrical amplification and optical amplification.

High Speed 4 × 2.5 Gbps-5 GHz AMI-WDM-RoF Transmission System for WLANs

2019 ◽  
Vol 40 (3) ◽  
pp. 285-288 ◽  
Author(s):  
Sushank Chaudhary ◽  
Priyanka Chauhan ◽  
Abhishek Sharma
Keyword(s):  
Optical Fiber ◽  
Wavelength Division Multiplexing ◽  
High Speed ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Local Area ◽  
Transmission System ◽  
Received Power ◽  
Radio Signals ◽  
5 Ghz

Abstract Radio-over-fiber (RoF) is revolutionary technique to transmit radio signals over optical fiber. It can be also suitable to distribute wireless local area networks (WLANs) due to its low-cost implementation. WLANs generally operate on 5 GHz radio signals. Thus in this work, four high speed radio channels, each carrying 2.5 Gbps data and 5 GHz radio signal, are transmitted by incorporating alternate mark inversion (AMI) scheme and wavelength division multiplexing (WDM) scheme over optical fiber having span of 50 km. The performance of proposed AMI-WDM-RoF transmission system is reported in terms of Q-factor, bit error rate, signal-to-noise ratio, total received power and eye diagrams.

Electrical Spreading Code-Based OFDM Optical Access Networks for Budget Enhancement and Reduced System Bandwidth Requirement

2015 ◽  
Vol 36 (4) ◽  
Author(s):  
Pravindra Kumar ◽  
Anand Srivastava
Keyword(s):  
Optical Networks ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Optical Network ◽  
Access Networks ◽  
Passive Optical Network ◽  
Spreading Code ◽  
Optical Access Networks ◽  
Optical Access ◽  
Code Division Multiple

AbstractPassive optical networks based on orthogonal frequency division multiplexing (OFDM-PON) give better performance in high-speed optical access networks. For further improvement in performance, a new architecture of OFDM-PON based on spreading code in electrical domain is proposed and analytically analyzed in this paper. This approach is referred as hybrid multi-carrier code division multiple access-passive optical network (MC-CDMA-PON). Analytical results show that at bit error rate (BER) of 10

scholarly journals HERMITIAN SYMMETRY BASED FIBER NON-LINEARITY COMPENSATION IN OPTICAL OFDM NETWORKS

2013 ◽  
pp. 8-14
Author(s):  
KAMALA KANNAN P ◽  
GURU VIGNESH B ◽  
INIYAN P A ◽  
ILAVARASAN T
Keyword(s):  
Optical Fiber ◽  
Optical Networks ◽  
Spectral Efficiency ◽  
Communication Systems ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Power Level ◽  
Optical Fiber Communication ◽  
High Spectral Efficiency ◽  
Optical Ofdm

Orthogonal Frequency Division Multiplexing (OFDM) is a modulation technique which is now used in most new and emerging broadband wired and wireless communication systems such as standard 802.11a/b/g/n, Digital Video Broad casting Television (DVB-TV), and Long Term Evolution (LTE) in the next mobile generation, due to its capacity in solving the problems of Inter-Symbol Interference (ISI) caused by the effects of the dispersive channel. Very recently researches focus on applying OFDM technology in optical fiber communication systems. Optical OFDM is well suited for high speed transmission systems with high spectral efficiency and attracted significant attention from the optical communication community. One of the major issues that degrade the performance of optical OFDM networks is its fiber non-linearity. Fiber non-linearities represent the fundamental limiting mechanisms to the amount of data that can be transmitted on a single optical fiber. Non-linear effects arise as optical fiber data rates, transmission lengths, number of wavelengths, and optical power level increases. Therefore, the effect of non-linearity in high data rate optical networks needs to be controlled to enhance link performances. In this paper, a nonlinearity compensation technique (Hermitian Symmetry) is implemented to improve the performance of OFDM based optical networks. This would provide high spectral efficiency, low ISI and very good Bit Error Rate (BER) performances without increasing the complexity of the network. The optical OFDM transmission system with fiber non-linearity compensation is simulated using Virtual Photonics Integrated (VPI) software.

Modeling and spectral analysis of high speed optical fiber communication with orthogonal frequency division multiplexing

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Demissie Jobir Galmecha ◽  
Bekele Tesema Hora ◽  
Ram Sewak Singh
Keyword(s):  
Optical Fiber ◽  
Optical Communication ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Direct Detection ◽  
Coherent Detection ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Transmission Systems ◽  
Data Rates

Abstract Optical communication has emerged as the best solution to high-speed transmission systems due to its higher bandwidth and higher data rates. The higher data rates with simple transmitter and receiver modeling are one of the best solutions to design the spectrally efficient high-speed optical transmission system using different modulation techniques. In the recent past, optical communication networks have been specifically designed and optimized to support different communication standards increasing the capabilities of optic fiber, integrated waveguides, and related optical fiber hardware, and signal conditioning circuits. So, this research paper presents a study, modeling, simulation, and analysis of optical performance under different transmission systems which are considered in a practical high-speed design using orthogonal frequency division multiplexing (OFDM). This can be done by using both coherent detection OFDM and direct detection OFDM to minimize dispersion effects in optical communication because OFDM is basic for modern technology to increase the data rate and increase the requirement of bandwidth in broadband services. Many optical fiber problems, such as chromatic dispersion (CD) and polarization mode dispersion (PMD) are solved using OFDM. The performance analyses made in this work by using different parameters such as bit error rate (BER), optical signal-to-noise ratio (OSNR), quality (Q) factor at different distance transmission by using different quadrature modulation such as 4-QAM, 16-QAM, 32-QAM, and 64-QAM to maintain the OSNR value, spectral efficiency, and the required data rates. The simulated results have shown that the coherent detection OFDM and direct detection OFDM with considered QAM provides the best value of BER and quality of the signal at a specific distance.

10 Gbps-60 GHz RoF Transmission System for 5 G Applications

2019 ◽  
Vol 40 (3) ◽  
pp. 281-284 ◽  
Author(s):  
Sushank Chaudhary ◽  
Deepika Thakur ◽  
Abhishek Sharma
Keyword(s):  
Comparative Analysis ◽  
Optical Fiber ◽  
Bit Error Rate ◽  
Error Rate ◽  
High Speed ◽  
Radio Over Fiber ◽  
60 Ghz ◽  
Q Factor ◽  
Successful Transmission ◽  
Radio Signals

Abstract This work is focused on transmission of 10 Gbps data and 60 GHz millimeter signal over 60 km optical fiber for 5 G applications. 5 G networks generally use millimeter range of frequencies. Radio over fiber is revolutionary technology to transmit radio signals over optical fiber. Furthermore, the comparative analysis of non-return to zero (NRZ) and return to zero (RZ) encoding schemes is also done. The results are reported in terms of Q-factor, bit error rate and eye diagrams. The reported results show the successful transmission of high speed 10 Gbps data and 60 GHz millimeter signal over 60 km optical fiber.

A 2 × 20 Gbps hybrid MDM-OFDM–based high-altitude platform-to-satellite FSO transmission system

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Vel Murugan Gomathy ◽  
T. V. Paramasivam Sundararajan ◽  
C. Sengodan Boopathi ◽  
Pandiyan Venkatesh Kumar ◽  
Krishnamoorthy Vinoth Kumar ◽  
...  
Keyword(s):  
High Altitude ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Satellite Communication ◽  
Input Power ◽  
Transmission System ◽  
Communication Link ◽  
Space Optics ◽  
High Altitude Platform ◽  
Mode Division Multiplexing

AbstractIn the present study, the application of free space optics (FSO) transmission system to realize a long-reach high-altitude platform (HAP)-to-satellite communication link has been exploited. High-speed information transmission without interference is accomplished using orthogonal frequency division multiplexing (OFDM). Further, the information capacity of the proposed system is increased by employing mode division multiplexing (MDM). We have investigated the proposed MDM-OFDM-HAP-to-satellite FSO transmission system performance over varying FSO range, diameter of the receiver, pointing errors, and input power. Also, an improved transmission performance of the proposed system using a square root module is reported.

High speed optical switching gain based EDFA model with 30 Gb/s NRZ modulation code in optical systems

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Mahmoud M. A. Eid ◽  
Ahmed Nabih Zaki Rashed ◽  
Keyword(s):  
Optical Fiber ◽  
High Speed ◽  
Optical Switching ◽  
Fiber Amplifier ◽  
Optical Systems ◽  
Power Budget ◽  
Erbium Doped Fiber Amplifier ◽  
Amplifier Model ◽  
Modulation Rate ◽  
Modulation Code

AbstractThis study presents high speed optical switching gain based Erbium doped fiber amplifier model. By using the proposed model the optical fiber loss can be minimized. The system is stabilized with the power budget of 25.875 mW a long 75 km as a length of optical fiber in this study can be verified. The modulation rate of 10 Gb/s can be upgrade up to reach 30 Gb/s. The suitable power for the optical transmitter is −2.440 dBm and NRZ modulation code is verified. The receiver sensitivity can be upgraded with the minimum bit error rate and max Q factor are 1.806 e−009 and 5.899.

Mobility aware of WDM-based CMO OFDM communication system

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Saad M. Hardan ◽  
Ayad A. Abdulkafi ◽  
Saadi Hamad Thalij ◽  
Sherine S. Jumaah
Keyword(s):  
Wavelength Division Multiplexing ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Speed ◽  
Light Emitting Diode ◽  
Access Point ◽  
Mobile Users ◽  
Visible Light Communications ◽  
Optical Wireless Communications ◽  
High Data ◽  
The Impact

Abstract The continued increase in several mobile applications forces to replace existing limited spectrum indoor radio frequency wireless connections with high-speed ones. Visible light communications (VLC) technology has gained prominence in the development of high data rate transmission for fifth-generation networks. In optical wireless communications, light-emitting diode (LED) transmitters are used in applications that desire mobility as LED divergence enables larger coverage. Since each VLC access point covers a small area, handovers of mobile users are inevitable. Wavelength division multiplexing (WDM) can be used in VLC systems to tackle the above issue and to meet the increasing demand for indoor connectivity with high bit rates. In this paper, a new system architecture for WDM with coded modulated optical in orthogonal frequency division multiplexing (OFDM) VLC system in conjunction with red, green, blue, and yellow (RGBY) LEDs is proposed to reduce the impact of random receiver orientation of indoor mobile users over VLC downlink channels and improves the system’s bit-error-rate (BER) performance. Simulation results show that the proposed method is not affected by the user’s mobility and hence it performs better than other approaches, in terms of BER for all scenarios and at all positions. This study reveals that using WDM-OFDM-VLC with RGBY LEDs to construct a VLC system is very promising.

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