In this paper, the performance of single-tone Radio over Fiber (RoF) system has been analyzed by
employing different duobinary modulation formats. This single-tone RoF system has been modeled and
analyzed using OptiSystem (14.0) software. To evaluate the transmission performance of RoF system,
various performance metrics such as Q-factor, BER, and Eye Height are considered. Simulation results
indicate that duobinary Hyperbolic-Secant pulse generator format with Single Drive Mach-Zehnder
modulator provides better Q-factor and minimum BER as compared to existing modulation format in RoF
system.
INVESTIGATION OF FWM EFFECT ON BER IN WDM OPTICAL COMMUNICATION SYSTEM WITH B...ijdpsjournal
This paper simulates two channel WDM optical communication system to investigate the effect of FWM on Bit Error Rate for Duo-binary & binary modulation like NRZ Rectangular at different dispersion value ,core effective area of fiber & channel spacing for 100km long optical communication system. BER
got improved with duobinary modulation format & by increasing core effective area which will offer a significant performance benefit in digital systems.
The effects of optical nonlinearities in optical fibers are ubiquitous. These effects can be deleterious, but
also have many useful applications, especially in the field of implementing all-optical functionalities in optical
networks. The paper is devoted to modeling the evolution of signal at 400 Gbps during non linear propagation for
DP 16-QAM modulation format in order to show the impact of optical launch power and fiber span transmission
on the propagation. This study is focused on the non linear propagation of fiber to obtain the relationship between
Optical Launch Power (OLP) and Error Vector Magnitude (EVM). It is found that the for the range of launch
power (-8dBm to 4dBm) , EVM is below 16%.
Keywords: DP, EVM, OLP, QAM.
Received Power performance in downlink architecture of Radio-over-Fiber Trans...IOSR Journals
Abstract : The In this paper, we studied the RoF system and analyzed the received power performance in downlink architecture of RoF system. The RoF system employs a Mach–Zehnder modulator (MZM) and a phase shifter to externally generate an optical single sideband (OSSB) signal since the OSSB signal is tolerable for power degradation due to a chromatic fiber-dispersion effect. The received power performance is analyzed by calculating a factor called Power Penalty. It is shown that Power penalty is increased exponentially as the differential delay increased with the distance due to chromatic dispersion with the change in laser linewidth (𝛾𝑅𝐹) from 10MHz to 1000MHz. The results are calculated for various transmission distances (𝐿𝐹𝐼𝐵𝐸𝑅) 1km to 40km for optical distances. The frequency of laser taken is 30-GHz RF carrier (𝑓𝑅𝐹) and wavelength 1550-nm laser (λ) with zero line width, fiber dispersion parameter (D) 17 ps/nm·km.
Keywords: Chromatic dispersion, DEMZM, Laser line width, Power penalty and Received power.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Available online at [www.ijeete.com]EFFECT OF DISPERSION AND FIBER LENGTH ON ...Ankur Bindal
This paper introduces the non linear optical effect known as four wave mixing (FWM). In wavelength division multiplexing (WDM) systems four wave mixing can strongly affect the transmission performance on an optical link. As a result it is important to investigate the impact of FWM on the design and performance of WDM optical communication systems. The main objective of this paper is to analyze the FWM power for different values of fiber length and dispersion by designing and simulating a model in Optisim. In this paper, we have simulated the FWM design for three waves. The results obtained show that when the optical fiber length and dispersion value is increased FWM effect reduces. This result confirms that the fiber nonlinearities play decisive role in the WDM.
INVESTIGATION OF FWM EFFECT ON BER IN WDM OPTICAL COMMUNICATION SYSTEM WITH B...ijdpsjournal
This paper simulates two channel WDM optical communication system to investigate the effect of FWM on Bit Error Rate for Duo-binary & binary modulation like NRZ Rectangular at different dispersion value ,core effective area of fiber & channel spacing for 100km long optical communication system. BER
got improved with duobinary modulation format & by increasing core effective area which will offer a significant performance benefit in digital systems.
The effects of optical nonlinearities in optical fibers are ubiquitous. These effects can be deleterious, but
also have many useful applications, especially in the field of implementing all-optical functionalities in optical
networks. The paper is devoted to modeling the evolution of signal at 400 Gbps during non linear propagation for
DP 16-QAM modulation format in order to show the impact of optical launch power and fiber span transmission
on the propagation. This study is focused on the non linear propagation of fiber to obtain the relationship between
Optical Launch Power (OLP) and Error Vector Magnitude (EVM). It is found that the for the range of launch
power (-8dBm to 4dBm) , EVM is below 16%.
Keywords: DP, EVM, OLP, QAM.
Received Power performance in downlink architecture of Radio-over-Fiber Trans...IOSR Journals
Abstract : The In this paper, we studied the RoF system and analyzed the received power performance in downlink architecture of RoF system. The RoF system employs a Mach–Zehnder modulator (MZM) and a phase shifter to externally generate an optical single sideband (OSSB) signal since the OSSB signal is tolerable for power degradation due to a chromatic fiber-dispersion effect. The received power performance is analyzed by calculating a factor called Power Penalty. It is shown that Power penalty is increased exponentially as the differential delay increased with the distance due to chromatic dispersion with the change in laser linewidth (𝛾𝑅𝐹) from 10MHz to 1000MHz. The results are calculated for various transmission distances (𝐿𝐹𝐼𝐵𝐸𝑅) 1km to 40km for optical distances. The frequency of laser taken is 30-GHz RF carrier (𝑓𝑅𝐹) and wavelength 1550-nm laser (λ) with zero line width, fiber dispersion parameter (D) 17 ps/nm·km.
Keywords: Chromatic dispersion, DEMZM, Laser line width, Power penalty and Received power.
Research Inventy : International Journal of Engineering and Scienceresearchinventy
Research Inventy : International Journal of Engineering and Science is published by the group of young academic and industrial researchers with 12 Issues per year. It is an online as well as print version open access journal that provides rapid publication (monthly) of articles in all areas of the subject such as: civil, mechanical, chemical, electronic and computer engineering as well as production and information technology. The Journal welcomes the submission of manuscripts that meet the general criteria of significance and scientific excellence. Papers will be published by rapid process within 20 days after acceptance and peer review process takes only 7 days. All articles published in Research Inventy will be peer-reviewed.
Available online at [www.ijeete.com]EFFECT OF DISPERSION AND FIBER LENGTH ON ...Ankur Bindal
This paper introduces the non linear optical effect known as four wave mixing (FWM). In wavelength division multiplexing (WDM) systems four wave mixing can strongly affect the transmission performance on an optical link. As a result it is important to investigate the impact of FWM on the design and performance of WDM optical communication systems. The main objective of this paper is to analyze the FWM power for different values of fiber length and dispersion by designing and simulating a model in Optisim. In this paper, we have simulated the FWM design for three waves. The results obtained show that when the optical fiber length and dispersion value is increased FWM effect reduces. This result confirms that the fiber nonlinearities play decisive role in the WDM.
6 ijaems jan-2016-15-comparative analysis of free space optics and single mod...INFOGAIN PUBLICATION
In this paper we have done comparative analysis of free space optics and single mode fibre optical channels system. Performance study is done for variable ranges 1km, 50km and 100km for the FSO and SMF channels. Single Mode Fiber and Free Space Optical Channel is observed that maximum Q factor, minimum bit error rate and signal power. FSO requires no licensing or frequency synchronization. It also provides the transmission of data with unlimited bandwidth. Results expose the ability of improving the Q factor by using these channels and the optimum effect concluded at (1km) length of optical rang by using the FSO channel i.e. the quality factor and signal power were increased to reach (1943 ) and (22.46dBm) respectively and MIN. BER is zero.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Performance Analysis of Dispersion Compensation in Long Haul Optical Fiber wi...IOSR Journals
Abstract : In this paper, We investigate post, pre and symmetrical/mix dispersion compensation methods for 40
Gb/s non-return to zero link using standard and dispersion compensated fiber through FBG compensator to
optimize high data rate optical transmission. The influence of dispersion of FBG compensator and increases in
the power of CW laser has been studied to evaluate the performance of optical communication systems. The
simulation model of the WDM based on the Optisystem 11.0 is presented according to the above principle. The
simulation results are validated by analysing the Q-factor and Bit error rate (BER) in the numerical simulator.
It is found that post compensation performance is best and the input fiber power is taken as 5-10dB, the
corresponding BER performance is better.
Keywords - BER, Dispersion compensation, Q-factor, WDM.
techInvestigations with mode division multiplexed transmissionelelijjournal
This article presents proposed topology for mode division multiplexed link with SPDML and VCSEL, modulate electrical signal of 820nm wavelength. Transmission performance has been investigated for numerous modes, bit rates (2.5 to 10Gbps), transmission lengths of MMF (1 to 100km) and attenuation factor in conjunction with parabolic operational mode. Results illustrated successful performance up to nine modes in mode-division multiplexed transmission. Performance is improved at low data rates, illustrated higher OSNR with lower BER,-5dB attenuation factor. Though, at higher bit rate and longer
transmission length received OSNR is unsteady. It further inferred that transmission with large number of multiplexed modes result in degraded performance, augmented with minimization of mode coupling losses.Mode division multiplexed multimode optical communication can be a viable option for supplementary capacity augment in the preexisting and future fiber optic communication links.
Performance Evaluation and Simulation of OFDM in Optical Communication SystemsIJERA Editor
Orthogonal Frequency Division Multiplexing (OFDM) is of prime importance nowadays in long haul
communication networks because of its higher spectral efficiency, immunity to multipath fading and its
resilience to interference. Optical Orthogonal Frequency Division Multiplexing is considered as a promising
technology to satisfy the increased demand for bandwidth in broadband services. It is of two types based on the
detection techniques employed. They are direct detection and coherent detection. In direct detection OFDM, a
photodiode is used while in the latter the principle of optical mixing is utilized. This paper investigates the
architecture of single channel and four channel direct detection and coherent detection optical OFDM systems
and carries out performance analysis based on bit error rate and Q-factor. In the case of single channels, a date
rate of 10 Gbps is achieved while in 4 channel systems a data rate of 40 Gbps is achieved. Coherent Optical
OFDM (CO-OFDM) is the next generation technology for the optical communications, since it integrates the
advantages of both coherent systems and OFDM systems.
Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic ...IJECEIAES
This paper investigates transparent wavelength routed optical networks using three dif- ferent fiber types NZDSF, SMF and PSCF - and validates the effectiveness of Hybrid Raman/EDFA Fiber Amplification (HFA) with different pumping levels, up to the moderate 60% pumping regime. Nodes operate on the basis of flexible-grid elastic NyWDM transponders able to adapt the modulation format to the quality-of-transmission of the available lightpath, exploiting up to five 12.5 GHz spectral slots. Results consider a 37node Pan-European network for variable Raman pumping level, span length and average traffic per node. We show that HFA in moderate pumping regime reduces the power consumption and enhances spectral efficiency for all three fiber types with particular evidence in NZDSF. In essence to that, introduction of HFA is also beneficial to avoid blocking for higher traffic loads.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Reduction of Four-Wave Mixing in DWDM System using Electro-Optic Phase Modula...IJECEIAES
In this paper, electro-optic phase modulator (EOPM) is used to reduce the effect of four-wave mixing (FWM), which is placed after 64 DWDMchannels multiplexer. It was found that the FWM is very sensitive to the phase deviation of the EOPM, and it can be reduced by introducing a phase shift between pulses. The simulation results confirmed the ability of the EOPM in improving the system performanceas indicated by the bit error rates. In term of comparison, the system of 64 channels based intensity modulated/ direct detection (IM/DD) transmission achieved bit error rate of 10 over 30 km and 70km without and with EOPM, respectively. -26
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
6 ijaems jan-2016-15-comparative analysis of free space optics and single mod...INFOGAIN PUBLICATION
In this paper we have done comparative analysis of free space optics and single mode fibre optical channels system. Performance study is done for variable ranges 1km, 50km and 100km for the FSO and SMF channels. Single Mode Fiber and Free Space Optical Channel is observed that maximum Q factor, minimum bit error rate and signal power. FSO requires no licensing or frequency synchronization. It also provides the transmission of data with unlimited bandwidth. Results expose the ability of improving the Q factor by using these channels and the optimum effect concluded at (1km) length of optical rang by using the FSO channel i.e. the quality factor and signal power were increased to reach (1943 ) and (22.46dBm) respectively and MIN. BER is zero.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Performance Analysis of Dispersion Compensation in Long Haul Optical Fiber wi...IOSR Journals
Abstract : In this paper, We investigate post, pre and symmetrical/mix dispersion compensation methods for 40
Gb/s non-return to zero link using standard and dispersion compensated fiber through FBG compensator to
optimize high data rate optical transmission. The influence of dispersion of FBG compensator and increases in
the power of CW laser has been studied to evaluate the performance of optical communication systems. The
simulation model of the WDM based on the Optisystem 11.0 is presented according to the above principle. The
simulation results are validated by analysing the Q-factor and Bit error rate (BER) in the numerical simulator.
It is found that post compensation performance is best and the input fiber power is taken as 5-10dB, the
corresponding BER performance is better.
Keywords - BER, Dispersion compensation, Q-factor, WDM.
techInvestigations with mode division multiplexed transmissionelelijjournal
This article presents proposed topology for mode division multiplexed link with SPDML and VCSEL, modulate electrical signal of 820nm wavelength. Transmission performance has been investigated for numerous modes, bit rates (2.5 to 10Gbps), transmission lengths of MMF (1 to 100km) and attenuation factor in conjunction with parabolic operational mode. Results illustrated successful performance up to nine modes in mode-division multiplexed transmission. Performance is improved at low data rates, illustrated higher OSNR with lower BER,-5dB attenuation factor. Though, at higher bit rate and longer
transmission length received OSNR is unsteady. It further inferred that transmission with large number of multiplexed modes result in degraded performance, augmented with minimization of mode coupling losses.Mode division multiplexed multimode optical communication can be a viable option for supplementary capacity augment in the preexisting and future fiber optic communication links.
Performance Evaluation and Simulation of OFDM in Optical Communication SystemsIJERA Editor
Orthogonal Frequency Division Multiplexing (OFDM) is of prime importance nowadays in long haul
communication networks because of its higher spectral efficiency, immunity to multipath fading and its
resilience to interference. Optical Orthogonal Frequency Division Multiplexing is considered as a promising
technology to satisfy the increased demand for bandwidth in broadband services. It is of two types based on the
detection techniques employed. They are direct detection and coherent detection. In direct detection OFDM, a
photodiode is used while in the latter the principle of optical mixing is utilized. This paper investigates the
architecture of single channel and four channel direct detection and coherent detection optical OFDM systems
and carries out performance analysis based on bit error rate and Q-factor. In the case of single channels, a date
rate of 10 Gbps is achieved while in 4 channel systems a data rate of 40 Gbps is achieved. Coherent Optical
OFDM (CO-OFDM) is the next generation technology for the optical communications, since it integrates the
advantages of both coherent systems and OFDM systems.
Raman Pumping as an Energy Efficient Solution for NyWDM Flexible-grid Elastic ...IJECEIAES
This paper investigates transparent wavelength routed optical networks using three dif- ferent fiber types NZDSF, SMF and PSCF - and validates the effectiveness of Hybrid Raman/EDFA Fiber Amplification (HFA) with different pumping levels, up to the moderate 60% pumping regime. Nodes operate on the basis of flexible-grid elastic NyWDM transponders able to adapt the modulation format to the quality-of-transmission of the available lightpath, exploiting up to five 12.5 GHz spectral slots. Results consider a 37node Pan-European network for variable Raman pumping level, span length and average traffic per node. We show that HFA in moderate pumping regime reduces the power consumption and enhances spectral efficiency for all three fiber types with particular evidence in NZDSF. In essence to that, introduction of HFA is also beneficial to avoid blocking for higher traffic loads.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Reduction of Four-Wave Mixing in DWDM System using Electro-Optic Phase Modula...IJECEIAES
In this paper, electro-optic phase modulator (EOPM) is used to reduce the effect of four-wave mixing (FWM), which is placed after 64 DWDMchannels multiplexer. It was found that the FWM is very sensitive to the phase deviation of the EOPM, and it can be reduced by introducing a phase shift between pulses. The simulation results confirmed the ability of the EOPM in improving the system performanceas indicated by the bit error rates. In term of comparison, the system of 64 channels based intensity modulated/ direct detection (IM/DD) transmission achieved bit error rate of 10 over 30 km and 70km without and with EOPM, respectively. -26
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Design and Performance Study of MMDWDM Systemselelijjournal
The rising need for bandwidth created innumerable efforts from academic and industry group towards development of most efficient optical communication networks. In order to compete it numerous investigators have designed their own novel schemes. In this view the paper presents multiple modulation dense wavelength division multiplexed transmission designed links each with a total capacity of 640Gbps and with channel to channel to spacing of 100Ghz, employing multiple modulation schemes such as non return to zero rectangular, non return to zero raised cosine, return to zero rectangular, non return to zero raised cosine, return to zero soliton, return to zero Super Gaussian. The optical transmission performance characteristics like bit error rate, Q parameter at the output have been investigated by simulating different systems for a fixed transmission length of 260kilometers. Results show that transmission performance of DWDM system with non return to zero raised cosine scheme has been better with quality factor ranging from 16 to 23dB and bit error rate ranging from 10-11 to 10-40 for detected channels at selected transmission reach (260KM) and other schemes with good performance were RZ Super Guassian DWDM and RZ Soliton DWDM systems for the same transmission reach. The transmission parameter jitter have been also investigated for each system which depict that jitter effect is more severe for return to zero systems as compared to non return to zero DWDM systems. From the performance analysis for different optical links involving different modulation schemes it can be articulated that novel modulation scheme generally improves the transmission performance and must for modern optical communication systems operating at high bit rate and longer reach.
Duobinary modulation/predistortion techniques effects on high bit rate radio ...nooriasukmaningtyas
The work has presented duobinary modulation and predistortion techniques
for the radio over fiber system enhancement for achieving security level.
Duobinary modulation technique has more compact modulated spectral
linewidth with standard non return to zero modulation code. Different
NRZ/RZ rectangle shape employed that are namely exponential rectangle
shape (ERS), and Gaussian rectangle shape (GRS) for different transmission
bit rates. Switching bias voltage, and switching RF voltage based LiNbO3
modulator are changed to measure the performance parameters of the radio
over fiber (RoF) system. Predistortion technique improves the linearity of
transmitter amplifiers and it is considered as a power efficiency technique.
The optimum values of the Q-factor, data error rate (BER), electrical power,
signal gain, noise figure, and light signal/noise ratio are achieved with 8 Volt
for both switching biases/switching RF signal at 100 GHz. Signal
quality/BER and electrical power after the receiver enhancement ratio by
using this technique at different RF signal frequencies.
As we know Optical communication Network offers
very high potential bandwidth and flexibility. In terms of high
bit-rate transmission. However, their performance slows down
due to some parameter like dispersion, attenuation, scattering. In
long haul application, dispersion is the main parameter which
needs to be compensated in order to provide better service. Fiber
Braggs Grating (FBG) is one of the most widely used element to
compensate it, however its performance slows down with the
increase in distance.
This paper presents an investigation on Pulse distortions due to
the third-order dispersion (TOD) on very high speed long
distance single mode optical fiber communication system using
OptiSystem. Presence of the TOD introduces broadening on the
propagating pulse. The impact of TOD is observed at the
receiving end of transmission line considering the variation of
different factors such as transmission reach, bit rate, duty
cycle.BER performance are also considered here.
Empirical analysis of polarization division multiplexing-dense wavelength di...IJECEIAES
This paper exemplifies dense wavelength division multiplexing combined with polarization division multiplexing with C-band frequency range-based single-mode fiber. In the proposed link, 32 independent channels with 16 individual wavelengths are multiplexed with two different angles of polarization. Each carrying 130 Gbps dual-polarization data with 200 GHz channel spacing claiming a net transmission rate of 4.16 Tbits/s with spectral efficiency of 69% with 20% side-mode-suppression-ratio (SMSR) and optical signal to noise ratio (OSNR) 40.7. The performance of the proposed techniques has been analyzed using optimized system parameters securing a minimum bit error rate (BER) 10-9 at a transmission distance up to 50 km.
Performance Analysis of Apodized Fiber Bragg Gratings Formats in Optical Comm...theijes
This paper presents the performance analysis of apodized fiber bragg an optical communication system. The effected fiber bragg for capacities uniform, Gaussian and tanh capacity has been implemented and investigated. The variable file of FBG performance is talented for the distinctive apodized capacity, including utilization in the RZ beat generator. The corresponding framework throughout the fiber mode channel is simulated using optisystem version 9 programs. Results show a fit correlation for the range, eye diagram and Q-variable figure
Spatial optical transmitter based on on/off keying line coding modulation sch...nooriasukmaningtyas
This study has presented a spatial optical transmitter based on on off keying line coding modulation scheme for the optimum performance of telecommunication systems. The encircled flux versus fiber core radius, the 3D graph for fiber mode versus core radius, and the signal power level in dBm versus wavelength through coarse wavelength division multiplexing with a fiber length of 20 km are presented and discussed in detail. The total power measured in W and dBm as well as the signal power amplitude level obtained through the infinite impulse response (IIR) filter based on both Z domain and pole/zero coefficient filter types are illustrated clearly. Signal gain, noise figure, maximum Q factor, and received power are also clarified against bit rates for various modulation line coding schemes.
analysis on design and implementation of 4×10 gb s wdm tdm pon with disparate...INFOGAIN PUBLICATION
This article presents a design of wavelength division multiplexing/ Time division Multiplexing (WDM-TDM) in passive optical network with a data rate of 10 Gbps. The implementation has been carried out for varying link distance from 40km to 100km for 4 different wavelengths with a maximum of 32 supporting users with two different receiver photodiodes. The parameters such as BER and the Q-factor for PON network is being analyzed with the link distance. The BER is decreased as the distance of the network is increased when using the APD receivers than PIN receiver. Optimal value of BER is obtained for a distance of 97 Km in APD and 96 Km in pin receiver.
A Literature Survey on Comparative Analysis of RZ and NRZ Line Encoding over ...IJSRD
Modern world is the world of internet which requires more capacity and more bandwidth to modernize the world. Hence we move towards optical communication. When we talk about optical communication then chromatic dispersion is biggest obstacle for high speed optical channel. Chromatic dispersion can be reduced either by compensation technique [1, 2] or either by electronic dispersion compensation. In this paper, we make comparative analysis in RZ and NRZ line encoding over 40 Gbps system. Two different modulation formats including non-return-to-zero (NRZ), return-to-zero (RZ) is compared on the basis of Bit error rate and quality factor. The 40 Gbps signal is transmitted over 200 km in single mode fiber.
A Literature Survey on Comparative Analysis of RZ and NRZ Line Encoding over ...IJSRD
Modern world is the world of internet which requires more capacity and more bandwidth to modernize the world. Hence we move towards optical communication. When we talk about optical communication then chromatic dispersion is biggest obstacle for high speed optical channel. Chromatic dispersion can be reduced either by compensation technique [1, 2] or either by electronic dispersion compensation. In this paper, we make comparative analysis in RZ and NRZ line encoding over 40 Gbps system. Two different modulation formats including non-return-to-zero (NRZ), return-to-zero (RZ) is compared on the basis of Bit error rate and quality factor. The 40 Gbps signal is transmitted over 200 km in single mode fiber.
Performance analysis and monitoring of various advanced digital modulation an...IJCNCJournal
To achieve better calculative performance in optical fiber communication and for simplicity of
implementation different digital modulation, detection and multiplexing techniques are used. These
techniques maximize the spectral efficiency. This paper reviews a tabular comparative analysis with 3D
graphical representation for different optical digital modulation formats and multiplexing techniques
within and beyond 400 Gb/s. In this particular article we survey about different parameters related to
digital fiber optic communication.
Similar to SIMULATIVE INVESTIGATION OF SINGLE-TONE ROF SYSTEM USING VARIOUS DUOBINARY MODULATION FORMATS (20)
Integrated Optics and Lightwave : An International Journaloptljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Lightwave : An International Journal ( OPTLJ )optljjournal
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contact mail : optljjournal@airccse.com
submit your research paper
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Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
ANALYTICAL PERFORMANCE EVALUATION OF AN LDPC CODED INDOOR OPTICAL WIRELESS CO...optljjournal
Recently, indoor Optical Wireless (OW) connectivity has gained significant attention as a possible
alternative to tackle the problem of bottleneck access and as an improvement to ever more conventional RF
/ microwave connections. In indoor OW communication, OOK encoding is more widely used owing to its
effective usage of bandwidth and robustness to timing errors, given the fact that the power consumption is
less than PPM. The modulation format in this research work is Q-array PPM over lasers, with modulation
of power. The effects of the analysis are analyzed numerically in view of the amount of bit error (BER). It is
shown that, because of coding for 4PPM framework, the bit error performance is increased. For instance,
an LDPC-coded device with stable foundation radiation provides a important coding improvement of 5 to 6
dB over uncoded device at BER in the order of 10-8 and 10-12 respectively.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews
ANALYTICAL PERFORMANCE EVALUATION OF A MIMO FSO COMMUNICATION SYSTEM WITH DIR...optljjournal
MIMO FSO correspondence is examined as of late to build up a hearty correspondence connects within the
sight of atmospheric turbulence. In this paper an analytical approach is developed to assess the impact of
atmospheric turbulence on BER performance of a MIMO FSO communication system with Q-ary Pulse
Position Modulation (QPPM). Examination is exhibited to discover flag to clamor proportion at the yield
of an immediate location collector with optical power modulator under strong turbulent condition which is
modeled as gamma-gamma distribution. The outcomes demonstrate that the BER performance is
emphatically debased because of the impact of atmospheric turbulence
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews.
Integrated Optics and Light wave: An International Journal ( OPTLJ )optljjournal
Innovations in optical fiber technology are revolutionizing world communications. Newly developed Optical fibers and amplifiers allow direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews
Water scarcity is the lack of fresh water resources to meet the standard water demand. There are two type of water scarcity. One is physical. The other is economic water scarcity.
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
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Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
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Forklift Classes Overview by Intella PartsIntella Parts
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Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
SIMULATIVE INVESTIGATION OF SINGLE-TONE ROF SYSTEM USING VARIOUS DUOBINARY MODULATION FORMATS
1. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
27
SIMULATIVE INVESTIGATION OF SINGLE-TONE
ROF SYSTEM USING VARIOUS DUOBINARY
MODULATION FORMATS
Namita Kathpal1
and Amit Kumar Garg2
1,2
Department of Electronics & Communication Engineering,
Deenbandhu Chhotu Ram University of Science & Technology, India.
ABSTRACT
In this paper, the performance of single-tone Radio over Fiber (RoF) system has been analyzed by
employing different duobinary modulation formats. This single-tone RoF system has been modeled and
analyzed using OptiSystem (14.0) software. To evaluate the transmission performance of RoF system,
various performance metrics such as Q-factor, BER, and Eye Height are considered. Simulation results
indicate that duobinary Hyperbolic-Secant pulse generator format with Single Drive Mach-Zehnder
modulator provides better Q-factor and minimum BER as compared to existing modulation format in RoF
system.
KEYWORDS
Duobinary NRZ, Duobinary RZ, Single Drive Mach-Zehnder Modulator, Duobinary Gaussian pulse
generator; Duobinary Hyperbolic-secant pulse generator
1. INTRODUCTION
The exponential increasing bandwidth demand for high-speed wireless access requires the
combination of wireless technology and fiber access technology [1]. Radio over Fiber is
considered to be a possible solution in providing broadband wireless access services in the
emerging optical wireless networks [2]. RoF uses analog optical transmission links and is used
extensively for distributed antenna system deployments around the world [3]. RoF system
performance depends on various factors such as modulation format, optical modulation, electrical
modulation, optical fiber, optical source power level, bit rate and an optical detector. Duobinary
modulation format has been used efficiently in RoF system since the duobinary signals provide
higher spectral efficiency by reducing the signal bandwidth by transmitting two successive bits in
the digital bit stream [4].
DB also provides higher chromatic dispersion tolerance which reduces the need for the dispersion
compensation technique [5]. MD-RZ modulation format has been analyzed using symmetrical
dispersion compensation technique which improves the system performance but reduces the
transmitted optical power [6]. The optical DPSK and DB formats have been combined to provide
40Gb/s signal transmission but this combined modulation format increased dispersion in long
reach WDM- Passive Optical Networks [7]. DB format can be implemented using single drive
MZM, provided high Q-factor and the channel spacing matches the interferometer free-spectral
range [8-9]. In this paper, the single-tone RoF system using various DB modulation formats has
been modulated using single drive MZM and the performance of various DB modulation format
in terms of Q-factor, BER, and eye height has been compared.
2. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
28
2. SIMULATION SETUP
The simulation setup is shown in Fig. 1 used to analyze and compare the performance DB-RZ,
DB-NRZ, DB-Gaussian and DB-Hyperbolic secant pulse generator modulation formats. In the
transmitter section, pseudo random bit sequence generator (PRBS) generates data signal which is
modulated by employing single drive MZM using DB-RZ, DB-NRZ, DB-Gaussian and DB-
Hyperbolic secant pulse generator modulation formats over a continuous wave laser biased at
193.1THz with a line width of 10MHz. The modulated optical signal is transmitted over an
optical fiber of length varying from 10km to 50km and amplified by EDFA. In the receiver
section, the amplified optical signal is detected by PIN photodetector and detected electrical
signal is filtered and analyzed by BER analyzer.
Table 1. Simulation Parameters.
Layout Parameters Value
Bit Rate 1Gbps to 15Gbps
Sequence Length 128bits
Samples per bit 64
Number of Samples 8192
Sensitivity -100dBm
Resolution 0.1nm
Transmitter Parameters Value
PRBS Bit Rate 1Gbps to 15Gbps
Duobinary Precoder Delay 1bit
CW Laser Power 0dBm
CW Laser Frequency 193.1THz
CW Laser Linewidth 10MHz
Single Drive MZM Parameters Value
Splitting Ratio 1.3
Bias Voltage1 -2.8V
Bias Voltage2 -1.1V
Modulation Voltage 1.5V
SMF Parameters Value
Length 10km to 50km
Attenuation 0.2dB/km
Dispersion 16ps/nm-km
Dispersion Slope 0.075
Effective Area 80µm2
Differential Group Delay 0.2ps/km
EDFA Parameters Value
Length 5m
Forward Pump Power 100mW
Backward Pump Power 0mW
Forward Pump Wavelength 980nm
Backward Pump Wavelength 980nm
Receiver Parameters Value
PIN Responsivity 1A/W
Dark Current 10nA
Thermal Noise 10-22
W/Hz
3. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
29
Low Pass Bessel Filter cut off
frequency
0.75 * Bit Rate Hz
Low Pass Bessel Filter Insertion
Loss
0dB
Low Pass Bessel Filter Order 4
Figure 1. Simulation Setup of single-tone RoF system employing different duobinary modulation format.
3. RESULTS AND DISCUSSION
Fig. 2 shows the eye diagrams for various duobinary modulation formats for single tone RoF
system. It is observed that eye pattern is clearly opened in case of DB-Hyperbolic secant pulse
generator modulation format and shown in Fig. 2(d).
(a) (b)
(c) (d)
Figure 2 Eye Diagram of single-tone RoF system with (a) DB-RZ, (b) DB-NRZ, (c) DB-Gaussian, (d) DB-
Hyperbolic secant modulation formats at 20km fiber length for 15Gbps bit rate.
4. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
30
Table 2. Performance of DB-RZ, DB-NRZ, DB-Gaussian and DB-Hyperbolic secant Modulation Format
at various Fiber Length at 1Gbps.
Table 3. Performance of DB-RZ, DB-NRZ, DB-Gaussian and DB-Hyperbolic secant Modulation Format
at various Fiber Length at 5Gbps.
Table 4. Performance of DB-RZ, DB-NRZ, DB-Gaussian and DB-Hyperbolic secant Modulation Format
at various Fiber Length at 10Gbps.
Table 5. Performance of DB-RZ, DB-NRZ, DB-Gaussian and DB-Hyperbolic secant Modulation Format
at various Fiber Length at 15Gbps.
Table 2-5 summarizes the value of various performance metrics for single tone RoF system with different
duobinary modulation formats. At 1Gbps and 5Gbps bit rate, DB-NRZ provides the maximum Q-factor at
various fiber length as shown in Table 2 and Table 3.
5. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
31
(a)
(b)
6. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
32
(c)
(d)
Figure 3 Q-Factor vs Fiber Length (km) at (a) 1Gbps, (b) 5Gbps, (c) 10Gbps and (d) 15Gbps.
Based on the result achieved in Table 4, it is seen that at 10Gbps, DB-NRZ, DB-RZ and DB-
Gaussian pulse generator provides high Q-factor at small fiber length whereas DB-Hyperbolic
secant pulse generator performs best at 50km fiber length.The Q-factor with the DB-Hyperbolic
secant pulse generator modulation format is calculated as 14.99 and reduced to 9.86 using DB-
Gaussian modulation format, which again reduces to 7.72 using DB-NRZ format, which is
further, reduces to 7.12 in the case of DBRZ format at 15Gbps for 20km fiber length as shown in
Table 5. It is also observed from Fig. 2 (a-d) and Table 3-5 that BER reduces more by using DB-
Hyperbolic secant pulse generator modulation format at high bit rate for long transmission
distance.
7. Integrated Optics and Lightwave:An International Journal(OPTLJ), Vol. 1, No.1
33
In Fig. 3 Q-factor versus fiber length at various bit rate has been analyzed for different
modulation formats. Fig. 3 (a) and Fig. 3 (b) reveals that both DB-RZ and DB-NRZ have high
Q-factor for low bit rates i.e. 1Gbps and 5Gbps but when bit rate is increased, as shown in Fig. 3
(c) and Fig. 3 (d) both DB-RZ and DB-NRZ shows a rapid decrease in Q-factor. Thus, from the
simulation results obtained, it is concluded that Q-factor is more in case of hyperbolic secant
pulse modulation format at 15Gbps for long transmission distance as shown in Fig. 3 (d).
4. CONCLUSIONS
The performance of DB-RZ, DB-NRZ, DB-Gaussian and DB-Hyperbolic secant pulse generator
modulation formats has been analyzed in terms of the eye diagram, Q-factor, and BER for single
tone RoF system. Simulation result indicates that DB-Hyperbolic secant pulse generator
modulation format works efficiently as it provides high Q-factor, less BER and maximum eye
opening for longer transmission distance as compared to other DB modulation formats at
15Gbps. Thus DB-Hyperbolic secant pulse generator modulation format is the practical solution
for long haul RoF communication system.
REFERENCES
[1] Thomas, V. A., Ghafoor, S., El-hajjar, M., Hanzo, L. (2013). Baseband Radio over Fiber Aided
Millimeter-Wave Distributed Antenna for Optical/Wireless Integration. IEEE Communication Letters,
17(5), 1012–1015.
[2] S. Li, X. Zheng, H. Zhang, and B. Zhou, “Highly Linear Radio-Over-Fiber System Incorporating a
Single-Drive Dual-Parallel Mach – Zehnder Modulator,” IEEE Photonics Technology Letters, vol. 22,
no. 24, pp. 1775–1777, 2010.
[3] K. Wang, X. Zheng, H. Zhang, and Y. Guo, “A Radio-Over-Fiber Downstream Link Employing
Carrier-Suppressed Modulation Scheme to Regenerate and Transmit Vector Signals,” IEEE Photonics
Technology Letters, vol. 19, no. 18, pp. 2006–2008, 2007.
[4] D. Wake, A. Nkansah, N. J. Gomes, S. Member, G. De Valicourt, R. Brenot, M. Violas, Z. Liu, F.
Ferreira, and S. Pato, “A Comparison of Radio Over Fiber Link Types for the Support of Wideband
Radio Channels,” Journal of Lightwave Technology, vol. 28, no. 16, pp. 2416–2422, 2010.
[5] Y. Chang, C. Chien, J. Jyehong, K. Ming, and P. Chi, “Effects of filter bandwidth and driving voltage
on optical duobinary transmission systems,” Optical Fiber Technology, vol. 13, pp. 231–235, 2007.
[6] W. Kaiser, T. Wuth, M. Wichers, and W. Rosenkranz, “Reduced Complexity Optical Duobinary
10Gb / s Transmitter Setup Resulting in an Increased Transmission Distance,” IEEE Photonics
Technology Letters August, pp. 3–5, 2001.
[7] Y. Wang, and Y. Guan “Performance Simulations for a High-speed Optical Transmission System
Based on OptiSystem,” The 2014 7th International Congress on Image and Signal Processing
Performance, no. 1, pp. 907–911, 2014.
[8] B. Huang, Y. An, N. Chi, M. Xiong, H. Ou, W. Liu, and C. Peucheret, “Combining DPSK and
duobinary for the downstream in 40-Gb / s long-reach,” Optical Fiber Technology, vol. 19, pp. 179–
184, 2013.
[9] A. H. Gnauck, S. Member, X. Liu, S. Chandrasekhar, and X. Wei,“Optical Duobinary Format From
Demodulation of DPSK Using Athermal Delay Interferometer,” IEEE Photonics Technology Letters,
vol. 18, no. 4, pp. 2005–2007, 2006.
[10] N. Kathpal, and A. K. Garg, “Performance Analysis of Multitone RoF system using DPSK based
Optical Modulators,” International Journal of Electronics, Electrical and Computational System, vol.
6, no. 7, pp. 532–535, 2017.
[11] N. Kathpal and A. K. Garg, “Performance analysis of Radio over Fiber system using Direct and
External Modulation Schemes,” International Journal of Engineering Technology, Management and
Applied Sciences, vol. 8, no. 4, pp. 172–175, 2017.
[12] N. Kathpal and A. K. Garg, “Mitigation of Dispersion Effects for better Quality of Transmission in
RoF system – A Review,” International Journal of Engineering Technology, Management and
Applied Sciences, vol. 5, no. 3, pp. 9–13, 2017.