This document presents a simulation of a spatial optical transmitter based on on-off keying line coding modulation for telecommunication systems. Key findings of the simulation include:
1) Signal power, fiber modes, and Q-factor were analyzed against transmission bit rates and fiber core radius.
2) Higher transmission bit rates resulted in lower signal gain, higher noise figure, and lower maximum Q-factor.
3) On-off keying modulation had better performance than NRZ modulation in terms of these metrics.
4) The study presented the transmitter's design and discussed results on signal optimization over 20km of fiber.
Advanced modulation coding schemes for an optical transceiver systems–based O...journalBEEI
This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.
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.
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.
High speed pulse generators with electro-optic modulators based on different ...nooriasukmaningtyas
The paper outlines the simulation of various pulse generators for the
enhancement of optical fiber access transmission networks within flow rate
of 10 Gbps and transmission range of 100 km. The pulse generators are
gaussian, hyperbolic secant, triangle, sine, raised cosine in the transmission
stage. Proposed pulse generators are mixed with both electro-absorption
modulator (EAM) and Mach-Zehnder modulator (MZM) for efficient
transmission. We have compared the max. the quality factor with using
proposed pulse generators against nonreturn to zero (NRZ) return to zero
(RZ) pulse generators in the previous research works for different bit
sequences. The signal power amplitude is tested for both optical fiber and
PIN photodetector optical time-domain visualizer and RF spectrum analyzer
by using in the optimum cases for different bit sequence. It is observed that
proposed pulse generators/EAM have presented an efficient increase in Qfactor value compared with proposed pulse enerators/MZM for different bit sequences.
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.
Raised cosine/NRZ line coding techniques for upgrading free space optical com...TELKOMNIKA JOURNAL
This study examines raised cosine/NRZ line coding techniques for upgrading free space optical (FSO) communication systems through various levels of fog.The max. Q factors are simulated and estimated for clear air, light fog, and moderate fog weather conditions at a data rate of 20 Gb/s. The optical signal to noise ratio is also measured for different weather conditions. The total power after both FSO channel and avalanche photodiode (APD) photo-detector receiver is estimated by an optical power meter for max. distances.The study shows that the max. propagation distance is extended to 50 kmthrough clear air, 2.25 km through light fog, and 1.6 km through moderate fog with acceptable max. Q factor
Transmitting audio via fiber optics under nonlinear effects and optimized tun...IJECEIAES
The ability of fiber optic to overcome the signal transmission problems is making it a dominant transmission medium. Despite of this major positive attribute of optic fibers, there is still a downside for using the fiber optic communication; that is the nonlinearity problem. For the first time, a design of an audio signal is suggested and executed in MATLAB with integration with OptiSystem TM Software .The audio signal then transmitted in different shapes of modulation signals (NRZ, RZ, & RC) for different distances (100 km & 75 km) via a fiber optic media to be received in a receiving part of the simulated system. Three tests are used to do so. The first is the Quality-facto (Q-Factor) against the received power, second test is eye diagram performance and finally is the measuring of the amplitude of output (received) signal for each modulation signal shape using the Oscilloscope Visualizer. The NZR modulation signal was found to be the best one of the three used signals’ types in all three tests. The Q-factor for NRZ pulse shape (=12) was higher than that for RZ (=10) and RC (=8) for a 100 km distance at the same received power level.
Advanced modulation coding schemes for an optical transceiver systems–based O...journalBEEI
This paper examines advanced modulation coding schemes for an optical transceiver systems–based optical wireless communication (OWC) channel model. These modulation techniquesinclude On-Off keying and return to zero (RZ)/non–return to zero (NRZ) coding. The signal power level against time and frequency spectral variations are measured. The max. Q factor and min. bit error rate (BER) are estimated and clarified for each modulation code scheme by using an optisystem simulation model. Transmission bit rates of up to 40 Gb/s can be achieved for possible distances up to 500 km with acceptable Q factor. The received power and max. Q factor are measured and clarified with OWC distance variations. The On-Off keying modulation code scheme resulted in better performance than the other modulation code schemes did.
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.
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.
High speed pulse generators with electro-optic modulators based on different ...nooriasukmaningtyas
The paper outlines the simulation of various pulse generators for the
enhancement of optical fiber access transmission networks within flow rate
of 10 Gbps and transmission range of 100 km. The pulse generators are
gaussian, hyperbolic secant, triangle, sine, raised cosine in the transmission
stage. Proposed pulse generators are mixed with both electro-absorption
modulator (EAM) and Mach-Zehnder modulator (MZM) for efficient
transmission. We have compared the max. the quality factor with using
proposed pulse generators against nonreturn to zero (NRZ) return to zero
(RZ) pulse generators in the previous research works for different bit
sequences. The signal power amplitude is tested for both optical fiber and
PIN photodetector optical time-domain visualizer and RF spectrum analyzer
by using in the optimum cases for different bit sequence. It is observed that
proposed pulse generators/EAM have presented an efficient increase in Qfactor value compared with proposed pulse enerators/MZM for different bit sequences.
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.
Raised cosine/NRZ line coding techniques for upgrading free space optical com...TELKOMNIKA JOURNAL
This study examines raised cosine/NRZ line coding techniques for upgrading free space optical (FSO) communication systems through various levels of fog.The max. Q factors are simulated and estimated for clear air, light fog, and moderate fog weather conditions at a data rate of 20 Gb/s. The optical signal to noise ratio is also measured for different weather conditions. The total power after both FSO channel and avalanche photodiode (APD) photo-detector receiver is estimated by an optical power meter for max. distances.The study shows that the max. propagation distance is extended to 50 kmthrough clear air, 2.25 km through light fog, and 1.6 km through moderate fog with acceptable max. Q factor
Transmitting audio via fiber optics under nonlinear effects and optimized tun...IJECEIAES
The ability of fiber optic to overcome the signal transmission problems is making it a dominant transmission medium. Despite of this major positive attribute of optic fibers, there is still a downside for using the fiber optic communication; that is the nonlinearity problem. For the first time, a design of an audio signal is suggested and executed in MATLAB with integration with OptiSystem TM Software .The audio signal then transmitted in different shapes of modulation signals (NRZ, RZ, & RC) for different distances (100 km & 75 km) via a fiber optic media to be received in a receiving part of the simulated system. Three tests are used to do so. The first is the Quality-facto (Q-Factor) against the received power, second test is eye diagram performance and finally is the measuring of the amplitude of output (received) signal for each modulation signal shape using the Oscilloscope Visualizer. The NZR modulation signal was found to be the best one of the three used signals’ types in all three tests. The Q-factor for NRZ pulse shape (=12) was higher than that for RZ (=10) and RC (=8) for a 100 km distance at the same received power level.
Integrated DWDM and MIMO-OFDM System for 4G High Capacity Mobile Communicatio...CSCJournals
Dense wavelength-division multiplexing (DWDM) technique is a very promising data transmission technology for utilizing the capacity of the fiber. By DWDM, multiple signals (video, audio, data etc) staggered in wavelength domain can be multiplexed and transmitted down the same fiber. The Multiple-input multiple-output (MIMO) wireless technology in combination with orthogonal frequency division multiplexing (MIMO-OFDM) is an attractive air-interface solution for next-generation wireless local area networks (WLANs) and fourth-generation mobile cellular wireless systems. This article provides an overview of the integrated DWDM MIMO-OFDM technology and focuses on DWDM transmitter design with adequate dispersion compensation for high data rate of 10Gbps ,MIMO-OFDM system design, space-time coded signaling, receiver design and performance analysis in terms of bit error rate for Integrated system. The simulation is carried out using powerful software tools Optisystem and MATLAB . In this paper a 64 channel DWDM system is simulated for transmission of baseband NRZ signal over fiber. Each of the transmission is at bit rate of 10 Gbps leading to high data rate transmission of 640 Gbps.The resultant Bit Error Rate(BER) is in the range 10-12 for DWDM system which is given as input to MIMO-OFDM system..This system performance is analyzed in terms of BER with SNR for Rayleigh, and AWGN channels and BER of 10-4 is achieved at SNR of 10dbs
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.
Switchable dual-band bandpass filter based on stepped impedance resonator wit...TELKOMNIKA JOURNAL
This paper presents a new technique in designing the switchable dual-band bandpass filter at
2.4 GHz and 3.5 GHz for WLAN and WiMAX applications. Wideband bandpass filter designed based on
stepped impedance resonator at frequency of 3 GHz. To eliminate the interference from existing system
that operates in the same frequency band, a defected microstrip structure applied and implemented to
produce the notch response. In order to generate the switchable characteristic, the PIN diode was
introduced at the dual-band filter. It exhibits that the measured results for switchable attributes when the
diode is at OFF state, the wide passband is produced with the fractional bandwidth of 62.1 % centered at
2.9 GHz. Meanwhile, for the diode in ON state, the dual-passband has produced which centered at
2.5 GHz and 3.45 GHz. The experimental results showed good agreement with the simulation results. This
structure is very useful for wireless communication systems and its applications.
Analysis of System Capacity and Spectral Efficiency of Fixed-Grid NetworkIJCNCJournal
In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps are explained by using modern digital signal processing systems. The achieved spectrum efficiencies for PM-QPSK, PM-8 QAM, and PM-16 QAM, respectively, were 2, 3, and 4 (bits/s)/Hz. Different modulation like PM-QPSK, PM-8-QAM, and PM-16-QAM each has system capacities of 8-9, 12-13.5, and 16-18 Tbps and it reaches transmission distances of 3000, 1300, and 700 kilometers with acceptable Bit Error Rate (BER≤ 2× 10-3) respectively. Peak optical power for received signal detection and full width at half maximum is noted for the different modulations under a fixed grind network.
Analysis of System Capacity and Spectral Efficiency of Fixed-Grid NetworkIJCNCJournal
In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps are explained by using modern digital signal processing systems. The achieved spectrum efficiencies for PM-QPSK, PM-8 QAM, and PM-16 QAM, respectively, were 2, 3, and 4 (bits/s)/Hz. Different modulation like PM-QPSK, PM-8-QAM, and PM-16-QAM each has system capacities of 8-9, 12-13.5, and 16-18 Tbps and it reaches transmission distances of 3000, 1300, and 700 kilometers with acceptable Bit Error Rate (BER≤ 2× 10-3) respectively. Peak optical power for received signal detection and full width at half maximum is noted for the different modulations under a fixed grind network.
Implementation of 5G in Guided and Unguided Optical Communication System with...ijtsrd
Optical wireless communication is the budding technology of fifth generation communication networking systems. It is an emerging platform to interconnect the domestic appliance together with a strong optical backbone network. However for a very long distance communication over 500 to 1000 km optical fiber is irreplaceable. The speed of the data communication is higher in free space optical communication without amplifying the received signal at the receiver side. The microwave optical communication frequency ranges from 3GHz to 30 GHz. Millimeter wave optical communication with 5G network is under progress. In this paper, the speed of communication used is 50 Gbps. The different channels optical wireless communication OWC , free space Optical communication FSO and optical wired cables are considered with 5G speed. The Quality factor and maximum distance of transmission with suitable transmitter power is achieved via respective channels. Helen Vedanayagi Anita. R "Implementation of 5G in Guided and Unguided Optical Communication System with Cellular Frequency Bands" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28117.pdf Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/28117/implementation-of-5g-in-guided-and-unguided-optical-communication-system-with-cellular-frequency-bands/helen-vedanayagi-anita-r
A bandwidth reconfigurable antenna for devices in low UWB-applicationsTELKOMNIKA JOURNAL
A reconfigurable simple design planar antenna for ultra-wideband applications is proposed, with E-shaped slot contained four narrow vertical slots that has the capacity of switching using four PIN diodes with a ground plan and a microstrip power line. An additional circularly polarized (CP) band is obtained by changing the on/off states of the PIN diodes. Moreover, the four PIN diodes are attached in the middle of the E-shape slot and used to switch the radiation flow of the patch. For validation, a patch antenna design is offered, based on a distinctive situation analysis. The antenna offers the low-ultra-wideband (UWB) frequencies band. Therefore, the switch of the operating states of PIN diodes gives us a good bandwidth re-configurability. In addition, with this flexible configuration we achieve a good -10 dB bandwidths with the ability to change the bandwith ranges from narrow-band 2.3 GHz to wide-band 3.1 GHz. Also, we achieve a large band for 3 dB AR is 2.57 GHz.
Low Noise Amplifier using Darlington Pair At 90nm Technology IJECEIAES
The demand of low noise amplifier (LNA) has been rising in today’s communication system. LNA is the basic building circuit of the receiver section satellite. The design concept demonstrates the design trade off with NF, gain, power consumption. This paper reports on with analysis of wideband LNA. This paper shows the schematic of LNA by using Darlington pair amplifier. This LNA has been fabricated on 90nm CMOS process. This paper is focused on to make comparison of three stage and single stage LNA. Here, the phase mismatch between these patameters is quantitavely analyzed to study the effect on gain and noise figure (NF). In this paper, single stage LNA has shown the 23 dB measured gain, while the three stages LNA has demonstrated 29 dB measured gain. Here, LNA designed using darlington pair shows low NF of 3.3-4.8 dB, which comparable to other reported single stage LNA designs and appreciably low compared to the three stages LNA. Hence, findings from this paper suggest the use of single stage LNA designed using Darlington pair in transceiver satellite applications.
In this work, high-speed transmission over the long-haul optical channel using orthogonal frequency division multiplexing (OFDM) was investigated. Furthermore, we recommend mixing polarization division multiplexing (PDM) with coherent OFDM (CO-OFDM) and quadrature amplitude modulation (16-QAM) to improve spectral efficiency (SE) while transmitting over a wavelength division multiplexing (WDM) system.
An 800 Gb/s WDM PDM-CO-OFDM-16QAM transmission system with various channel spacing of 100 GHz, 50 GHz, and 25 GHz is examined utilizing the OptiSystem (2021) version 18.0 software package over ten spans of 60 km standard single-mode fiber (SSMF). Different channel spacing WDM systems have been compared in terms of performance and SE. The results reveal that the WDM system with 100 GHz channel spacing has a longer transmission range and needs minimal optical signal to noise ratio (OSNR) at the reception. The 25 GHz channel spacing WDM system exceeds the others in terms of SE. Further, the effect of ultra-low loss and large effective area fiber in lowering span loss and nonlinear effects for
25 GHz channel spacing WDM system is investigated. The findings show that the system performance with the new fiber outperforms the SSMF.
The acceptable bit error rate (BER) for this study is 0.033 (20% concatenated forward error correction (FEC) threshold).
Development of depth map from stereo images using sum of absolute differences...nooriasukmaningtyas
This article proposes a framework for the depth map reconstruction using stereo images. Fundamentally, this map provides an important information which commonly used in essential applications such as autonomous vehicle navigation, drone’s navigation and 3D surface reconstruction. To develop an accurate depth map, the framework must be robust against the challenging regions of low texture, plain color and repetitive pattern on the input stereo image. The development of this map requires several stages which starts with matching cost calculation, cost aggregation, optimization and refinement stage. Hence, this work develops a framework with sum of absolute difference (SAD) and the combination of two edge preserving filters to increase the robustness against the challenging regions. The SAD convolves using block matching technique to increase the efficiency of matching process on the low texture and plain color regions. Moreover, two edge preserving filters will increase the accuracy on the repetitive pattern region. The results show that the proposed method is accurate and capable to work with the challenging regions. The results are provided by the Middlebury standard dataset. The framework is also efficiently and can be applied on the 3D surface reconstruction. Moreover, this work is greatly competitive with previously available methods.
Model predictive controller for a retrofitted heat exchanger temperature cont...nooriasukmaningtyas
This paper aims to demonstrate the practical aspects of process control theory for undergraduate students at the Department of Chemical Engineering at the University of Bahrain. Both, the ubiquitous proportional integral derivative (PID) as well as model predictive control (MPC) and their auxiliaries were designed and implemented in a real-time framework. The latter was realized through retrofitting an existing plate-and-frame heat exchanger unit that has been operated using an analog PID temperature controller. The upgraded control system consists of a personal computer (PC), low-cost signal conditioning circuit, national instruments USB 6008 data acquisition card, and LabVIEW software. LabVIEW control design and simulation modules were used to design and implement the PID and MPC controllers. The performance of the designed controllers was evaluated while controlling the outlet temperature of the retrofitted plate-and-frame heat exchanger. The distinguished feature of the MPC controller in handling input and output constraints was perceived in real-time. From a pedagogical point of view, realizing the theory of process control through practical implementation was substantial in enhancing the student’s learning and the instructor’s teaching experience.
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Integrated DWDM and MIMO-OFDM System for 4G High Capacity Mobile Communicatio...CSCJournals
Dense wavelength-division multiplexing (DWDM) technique is a very promising data transmission technology for utilizing the capacity of the fiber. By DWDM, multiple signals (video, audio, data etc) staggered in wavelength domain can be multiplexed and transmitted down the same fiber. The Multiple-input multiple-output (MIMO) wireless technology in combination with orthogonal frequency division multiplexing (MIMO-OFDM) is an attractive air-interface solution for next-generation wireless local area networks (WLANs) and fourth-generation mobile cellular wireless systems. This article provides an overview of the integrated DWDM MIMO-OFDM technology and focuses on DWDM transmitter design with adequate dispersion compensation for high data rate of 10Gbps ,MIMO-OFDM system design, space-time coded signaling, receiver design and performance analysis in terms of bit error rate for Integrated system. The simulation is carried out using powerful software tools Optisystem and MATLAB . In this paper a 64 channel DWDM system is simulated for transmission of baseband NRZ signal over fiber. Each of the transmission is at bit rate of 10 Gbps leading to high data rate transmission of 640 Gbps.The resultant Bit Error Rate(BER) is in the range 10-12 for DWDM system which is given as input to MIMO-OFDM system..This system performance is analyzed in terms of BER with SNR for Rayleigh, and AWGN channels and BER of 10-4 is achieved at SNR of 10dbs
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.
Switchable dual-band bandpass filter based on stepped impedance resonator wit...TELKOMNIKA JOURNAL
This paper presents a new technique in designing the switchable dual-band bandpass filter at
2.4 GHz and 3.5 GHz for WLAN and WiMAX applications. Wideband bandpass filter designed based on
stepped impedance resonator at frequency of 3 GHz. To eliminate the interference from existing system
that operates in the same frequency band, a defected microstrip structure applied and implemented to
produce the notch response. In order to generate the switchable characteristic, the PIN diode was
introduced at the dual-band filter. It exhibits that the measured results for switchable attributes when the
diode is at OFF state, the wide passband is produced with the fractional bandwidth of 62.1 % centered at
2.9 GHz. Meanwhile, for the diode in ON state, the dual-passband has produced which centered at
2.5 GHz and 3.45 GHz. The experimental results showed good agreement with the simulation results. This
structure is very useful for wireless communication systems and its applications.
Analysis of System Capacity and Spectral Efficiency of Fixed-Grid NetworkIJCNCJournal
In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps are explained by using modern digital signal processing systems. The achieved spectrum efficiencies for PM-QPSK, PM-8 QAM, and PM-16 QAM, respectively, were 2, 3, and 4 (bits/s)/Hz. Different modulation like PM-QPSK, PM-8-QAM, and PM-16-QAM each has system capacities of 8-9, 12-13.5, and 16-18 Tbps and it reaches transmission distances of 3000, 1300, and 700 kilometers with acceptable Bit Error Rate (BER≤ 2× 10-3) respectively. Peak optical power for received signal detection and full width at half maximum is noted for the different modulations under a fixed grind network.
Analysis of System Capacity and Spectral Efficiency of Fixed-Grid NetworkIJCNCJournal
In this article, the performance of a fixed grid network is examined for various modulation formats to estimate the system's capacity and spectral efficiency. The optical In-phase Quadrature Modulator (IQM) structure is used to build a fixed grid network modulation, and the homodyne detection approach is used for the receiver. Data multiplexing is accomplished using the Polarization Division Multiplexed (PDM) technology. 100 Gbps, 150 Gbps, and 200 Gbps data rates are transmitted under these circumstances utilizing various modulation formats. Various pre-processing and signal recovery steps are explained by using modern digital signal processing systems. The achieved spectrum efficiencies for PM-QPSK, PM-8 QAM, and PM-16 QAM, respectively, were 2, 3, and 4 (bits/s)/Hz. Different modulation like PM-QPSK, PM-8-QAM, and PM-16-QAM each has system capacities of 8-9, 12-13.5, and 16-18 Tbps and it reaches transmission distances of 3000, 1300, and 700 kilometers with acceptable Bit Error Rate (BER≤ 2× 10-3) respectively. Peak optical power for received signal detection and full width at half maximum is noted for the different modulations under a fixed grind network.
Implementation of 5G in Guided and Unguided Optical Communication System with...ijtsrd
Optical wireless communication is the budding technology of fifth generation communication networking systems. It is an emerging platform to interconnect the domestic appliance together with a strong optical backbone network. However for a very long distance communication over 500 to 1000 km optical fiber is irreplaceable. The speed of the data communication is higher in free space optical communication without amplifying the received signal at the receiver side. The microwave optical communication frequency ranges from 3GHz to 30 GHz. Millimeter wave optical communication with 5G network is under progress. In this paper, the speed of communication used is 50 Gbps. The different channels optical wireless communication OWC , free space Optical communication FSO and optical wired cables are considered with 5G speed. The Quality factor and maximum distance of transmission with suitable transmitter power is achieved via respective channels. Helen Vedanayagi Anita. R "Implementation of 5G in Guided and Unguided Optical Communication System with Cellular Frequency Bands" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-3 | Issue-6 , October 2019, URL: https://www.ijtsrd.com/papers/ijtsrd28117.pdf Paper URL: https://www.ijtsrd.com/engineering/electronics-and-communication-engineering/28117/implementation-of-5g-in-guided-and-unguided-optical-communication-system-with-cellular-frequency-bands/helen-vedanayagi-anita-r
A bandwidth reconfigurable antenna for devices in low UWB-applicationsTELKOMNIKA JOURNAL
A reconfigurable simple design planar antenna for ultra-wideband applications is proposed, with E-shaped slot contained four narrow vertical slots that has the capacity of switching using four PIN diodes with a ground plan and a microstrip power line. An additional circularly polarized (CP) band is obtained by changing the on/off states of the PIN diodes. Moreover, the four PIN diodes are attached in the middle of the E-shape slot and used to switch the radiation flow of the patch. For validation, a patch antenna design is offered, based on a distinctive situation analysis. The antenna offers the low-ultra-wideband (UWB) frequencies band. Therefore, the switch of the operating states of PIN diodes gives us a good bandwidth re-configurability. In addition, with this flexible configuration we achieve a good -10 dB bandwidths with the ability to change the bandwith ranges from narrow-band 2.3 GHz to wide-band 3.1 GHz. Also, we achieve a large band for 3 dB AR is 2.57 GHz.
Low Noise Amplifier using Darlington Pair At 90nm Technology IJECEIAES
The demand of low noise amplifier (LNA) has been rising in today’s communication system. LNA is the basic building circuit of the receiver section satellite. The design concept demonstrates the design trade off with NF, gain, power consumption. This paper reports on with analysis of wideband LNA. This paper shows the schematic of LNA by using Darlington pair amplifier. This LNA has been fabricated on 90nm CMOS process. This paper is focused on to make comparison of three stage and single stage LNA. Here, the phase mismatch between these patameters is quantitavely analyzed to study the effect on gain and noise figure (NF). In this paper, single stage LNA has shown the 23 dB measured gain, while the three stages LNA has demonstrated 29 dB measured gain. Here, LNA designed using darlington pair shows low NF of 3.3-4.8 dB, which comparable to other reported single stage LNA designs and appreciably low compared to the three stages LNA. Hence, findings from this paper suggest the use of single stage LNA designed using Darlington pair in transceiver satellite applications.
In this work, high-speed transmission over the long-haul optical channel using orthogonal frequency division multiplexing (OFDM) was investigated. Furthermore, we recommend mixing polarization division multiplexing (PDM) with coherent OFDM (CO-OFDM) and quadrature amplitude modulation (16-QAM) to improve spectral efficiency (SE) while transmitting over a wavelength division multiplexing (WDM) system.
An 800 Gb/s WDM PDM-CO-OFDM-16QAM transmission system with various channel spacing of 100 GHz, 50 GHz, and 25 GHz is examined utilizing the OptiSystem (2021) version 18.0 software package over ten spans of 60 km standard single-mode fiber (SSMF). Different channel spacing WDM systems have been compared in terms of performance and SE. The results reveal that the WDM system with 100 GHz channel spacing has a longer transmission range and needs minimal optical signal to noise ratio (OSNR) at the reception. The 25 GHz channel spacing WDM system exceeds the others in terms of SE. Further, the effect of ultra-low loss and large effective area fiber in lowering span loss and nonlinear effects for
25 GHz channel spacing WDM system is investigated. The findings show that the system performance with the new fiber outperforms the SSMF.
The acceptable bit error rate (BER) for this study is 0.033 (20% concatenated forward error correction (FEC) threshold).
Similar to Spatial optical transmitter based on on/off keying line coding modulation scheme for optimum performance of telecommunication systems (20)
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CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
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Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Immunizing Image Classifiers Against Localized Adversary Attacksgerogepatton
This paper addresses the vulnerability of deep learning models, particularly convolutional neural networks
(CNN)s, to adversarial attacks and presents a proactive training technique designed to counter them. We
introduce a novel volumization algorithm, which transforms 2D images into 3D volumetric representations.
When combined with 3D convolution and deep curriculum learning optimization (CLO), itsignificantly improves
the immunity of models against localized universal attacks by up to 40%. We evaluate our proposed approach
using contemporary CNN architectures and the modified Canadian Institute for Advanced Research (CIFAR-10
and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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Spatial optical transmitter based on on/off keying line coding modulation scheme for optimum performance of telecommunication systems
1. Indonesian Journal of Electrical Engineering and Computer Science
Vol. 21, No. 1, January 2021, pp. 305~312
ISSN: 2502-4752, DOI: 10.11591/ijeecs.v21.i1.pp305-312 305
Journal homepage: http://ijeecs.iaescore.com
Spatial optical transmitter based on on/off keying line coding
modulation scheme for optimum performance of
telecommunication systems
Hazem M. El-Hageen1
, Aadel M. Alatwi2
, Ahmed Nabih Zaki Rashed3
1,2
Electrical Engineering Department, University of Tabuk, Saudi Arabia
1
Egyptian Nuclear & Radiological Regulatory Authority, Egypt
3
Electronics and Electrical Communications Engineering Department, Menoufia University, Egypt
Article Info ABSTRACT
Article history:
Received Apr 11, 2020
Revised Jul 8, 2020
Accepted Jul 15, 2020
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.
Keywords:
Line coding
On off keying
Optimum performance
Signal gain
Telecommunication system This is an open access article under the CC BY-SA license.
Corresponding Author:
Ahmed Nabih Zaki Rashed
Faculty of Electronic Engineering,
Menoufia University
Gamal Abd El-Nasir, Qism Shebeen El-Kom
Shibin el Kom, Menofia Governorate, Egypt
E-mail: zakirashed73355@gmail.com
1. RELATED WORKS
The information revolution is geared towards presenting, analyzing, and transporting information
with high efficiency. It relies on communication networks to transport information while computers are used
to present, analyze, and process data. Today, various data types are transmitted over communications
networks, namely, text, audio, images, computer data, videos, and so on. Therefore, the network must be
equipped with the requirements of all types of information and the communication networks must be
independent of the information type [1-6]. The networks that support various information types are called
multimedia networks. Huge amounts of high-speed multimedia data are being produced, so the design of
multimedia networks must be capable of handling this. Among the most important specifications that must be
met is the high bit rate for real-time video services [7-12].
Optical fiber links comprise the best solution for implementing multimedia networks for fixed user
locations. The development of manufacturing technology for detectors and light sources has attracted
considerable attention, as they are key to the development of optical communication systems [13-19]. The
use of fiber to implement local area networks (LANs) has increased. Consequently, common LANs such as
Ethernet, token bus, token ring, and star have been implemented using optical fiber, which bestows numerous
2. ISSN: 2502-4752
Indonesian J Elec Eng & Comp Sci, Vol. 21, No. 1, January 2021 : 305 - 312
306
advantages. When the signal is optoelectronically regenerated or amplified [20-28], the network is classified
as an active broadcast network such as a token ring; otherwise, it is a passive broadcast network such as an
Ethernet or a token bus [29-37].
2. MODEL DESCRIPTION AND RESEARCH METHOD
Figure 1 shows the proposed simulation model for this study. User-defined sequence generators
generate a stream of bits, and all the bits are encoded with a hyperbolic secant pulse generator. The spatial
optical transmitter has the following technical specifications: frequency=1550 nm, power=0 dBm, on off
keying modulation type, power ratio array=1, extinction ratio=10 dB, and linewidth=10 MHz. The interaction
between the encoded electrical signal and the light signal happens through LiNbO3 modulators.
Figure 1. The simulation model for this study
These modulators are used to modulate the electro-optic signals. The modulated signal is directed to
the coarse wavelength division multiplexing (CWDM) with a fiber length of 20 km. The signal power, noise
power, input/output light signal-to-noise ratio, signal gain, and noise figure are determined using the dual-
port WDM analyzer. EDFA is used to compensate for the losses due to the attenuation in the fiber cable.
Fabry-Perot light filters are used to filter the original signal from any unwanted noise parts. The Fabry-Perot
light filters have the following technical specifications: frequency=193.1 THz, bandwidth=250 GHz, and free
spectral range=500 GHz. The light PIN photo-detectors convert the light signal to electrical form, which it is
later filtered by the infinite impulse response (IIR) filter. The encircle flux analyzer measures the electric
field distribution with the fiber core radius. The spatial visualizer measures the available number of modes in
the fiber with its configuration. The signal power level is measured with the time period by an optical
spectrum analyzer.
3. Indonesian J Elec Eng & Comp Sci ISSN: 2502-4752
Spatial optical transmitter based on on/off keying line coding … (Hazem M. El-Hageen)
307
3. PERFORMANCE ANALYSIS WITH DISCUSSIONS
The maximum Q factor, minimum BER, and received power are measured through the BER
analyzer and the optical power meters, respectively. Based on the data in Table 1, the simulation results are
measured and clarified. Moreover, the encircle flux analyzer measures the electric field distribution with the
fiber core radius. The spatial visualizer measures the available number of modes in the fiber with its
configuration.
Table 1. Variables used in this work
Variables Value/Unit
Frequency 193.1 THz
Power 0 dBm
Transmission bit rate 10 Gb/s, 40 Gb/s, 100 Gb/s
Extinction ratio 10 dB
Fiber optic CWDM length 20 km
EDFA amplifier length 5 m
Optical filter bandwidth 250 GHz
PIN receiver responsivity 1 A/W
PIN receiver dark current 10 nA
Figure 2 shows the signal power level in dBm versus wavelength through the CWDM with a fiber
length of 20 km. The maximum signal power is -9.78205 dBm while the minimum noise power is -104.296
dBm. Figure 3 presents the encircled flux versus the fiber core radius through the CWDM with a fiber length
of 20 km. At a fiber core radius of 2 μm, the encircled flux reaches 20% but at a fiber core radius of 8 μm,
the encircled flux reaches 80%. In addition, at fiber core radii of 10 μm and 20 μm, the encircled flux reaches
100%. Figure 4 demonstrates the 3D graph for fiber mode versus core radius through the CWDM fiber with a
length of 20 km. The mode field Gaussian intensity distribution through the fiber core radius is from 10 μm
to 20 μm from the x axis. The polar power polarization in the x direction is shown in Figure 4.
Figure 5 indicates the total power measured in W and dBm through the IIR filter based on the Z
domain coefficient filter type. The total power is 277.158 μW or -6.437 dBm. Figure 6 demonstrates the total
power measured in W and dBm through the IIR filter based on the pole/zero coefficient filter type. The total
power is 544.784 μW or -2.638 dBm.
Figure 2. The signal power level in dBm versus wavelength through the CWDM fiber with a length of 20 km
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Figure 3. The encircled flux versus fiber core radius through the CWDM fiber with a length of 20 km
Figure 4. The 3D graph for fiber mode configuration versus core radius through the CWDM fiber with a
length of 20 km
Figure 5. The total power measured in W and dBm
through the IIR filter based on Z domain coefficient
filter type
Figure 6. The total power measured in W and
dBm through the IIR filter based on pole/zero
coefficient filter type
5. Indonesian J Elec Eng & Comp Sci ISSN: 2502-4752
Spatial optical transmitter based on on/off keying line coding … (Hazem M. El-Hageen)
309
Figure 7 and Figure 8 show the signal power amplitude level through the IIR filter based on both Z
domain and pole/zero coefficient filter types. Based on the Z domain coefficient filter type, the maximum Q
factor is 13.44 and the minimum BER is 1.59 x 10-44
; these results are obtained using the IIR filter (Figure 7).
Meanwhile, based on the pole/zero coefficient filter type, the maximum Q factor is 14.216 and the minimum
BER is 3.44 x 10-46
; these results are obtained using the IIR filter (Figure 8).
Figure 9 presents the signal gain against transmission data rate for different line coding schemes.
For on-off line coding, the signal gain is 27.65 dB at 10 Gb/s, 13.46 dB at 40 Gb/s, and 9 dB at 100 Gb/s.
Meanwhile, for NRZ line coding, the signal gain is 24.65 dB at 10 Gb/s, 9.54 dB at 40 Gb/s, and 4.765 dB at
100 Gb/s. As the transmission bit rate increases, the signal gain decreases.
Figure 7. The signal power amplitude level through the IIR filter based on Z domain coefficient filter type
Figure 8. The signal power amplitude level through the IIR filter based on pole/zero coefficient filter type
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Figure 9. The signal gain against transmission data rate for different line coding schemes
Figure 10 indicates the noise figure against the transmission data rate for different line coding
schemes. For on-off line coding, the noise figure is 1.12 dB at 10 Gb/s, 2.56 dB at 40 Gb/s, and 4 dB at 100
Gb/s. Meanwhile, for NRZ line coding, the noise figure is 3.765 dB at 10 Gb/s, 5 dB at 40 Gb/s, and 7 dB at
100 Gb/s. As the transmission bit rate increases, the noise figure increases.
Figure 11 presents the maximum Q factor against the transmission data rate for different line coding
schemes. For on-off line coding, the maximum Q factor is 13.44 at 10 Gb/s, 4.88 at 40 Gb/s, and 1.65 at 100
Gb/s. Meanwhile, for NRZ line coding, the maximum Q factor is 10.23 at 10 Gb/s, 3.12 at 40 Gb/s, and
0.6754 at 100 Gb/s. As the transmission bit rate increases, the maximum Q factor decreases.
Figure 12 shows the received power against the transmission data rate for different line coding
schemes. For on-off line coding, the received power is 0.666 μW at 10 Gb/s, 0.49 μW at 40 Gb/s, and 0.44
μW at 100 Gb/s. Meanwhile, for NRZ line coding, the received power is 0.646 μW at 10 Gb/s, 0.489 μW at
40 Gb/s, and 0.4 μW at 100 Gb/s. As the transmission bit rate increases, the received power decreases.
Figure 10. The noise figure against transmission data rate for different line coding schemes
Figure 11. Max. The maximum Q factor against transmission data rate for different line coding schemes
0
5
10
15
20
25
30
10 Gb/s 40 Gb/s 100 Gb/s
Transmission Data Rates (Gb/s)
Signal
Gain
(dB)
On Off line coding
NRZ line coding
0
1
2
3
4
5
6
7
10 Gb/s 40 Gb/s 100 Gb/s
Transmission Data Rates (Gb/s)
Noise
Figure
(dB)
On Off line coding
NRZ line coding
0
2
4
6
8
10
12
14
10 Gb/s 40 Gb/s 100 Gb/s
Transmission Data Rates (Gb/s)
Max.
Q
Factor
On Off line coding
NRZ line coding
7. Indonesian J Elec Eng & Comp Sci ISSN: 2502-4752
Spatial optical transmitter based on on/off keying line coding … (Hazem M. El-Hageen)
311
Figure 12. The received power against transmission data rate for different line coding schemes
4. CONCLUSION
We have simulated an on-off line coding modulation technique for a spatial optical transmitter
through a CWDM fiber with a length of 20 km for the optimum performance of telecommunication
broadcasting systems. The optimum transmission data rates are achieved at 40 Gb/s with acceptable
maximum Q factor, minimum BER, maximum signal gain, minimum noise figure, and maximum received
power. The signal power amplitude level and total power are measured through the IIR filter based on both
Z domain and pole-zero coefficient filter types. The encircled flux and 3D graph for fiber mode configuration
versus core radius through a CWDM fiber with a length of 20 km are also clarified in the graphs.
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