Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier
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Microring resonators (MRRs) can be used to generate optical millimetre-wave solitons with a broadband frequency of 40–60 GHz. Non-linear light behaviours within MRRs, such as chaotic signals, can be used to generate logic codes (digital codes). The soliton signals can be multiplexed and modulated with the logic codes using an orthogonal frequency division multiplexing (OFDM) technique to transmit the data via a network system. OFDM uses overlapping subcarriers without causing inter-carrier interference. It provides both a high data rate and symbol duration using frequency division multiplexing over multiple subcarriers within one channel. The results show that MRRs support both single-carrier and multi-carrier optical soliton pulses, which can be used in an OFDM based on whether fast Fourier transform or discrete wavelet transform transmission/receiver system. Localised ultra-short soliton pulses within frequencies of 50 and 52 GHz can be seen at the throughput port of the panda system with respect to full-width at half-maximum (FWHM) and free spectrum range of 5 MHz and 2 GHz, respectively. The soliton pulses with FWHMs of 10 MHz could be generated at the drop port. Therefore, transmission of data information can be performed via a communication network using soliton pulse carriers and an OFDM technique.
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Seminar report on Fifth Generation of Wireless Technologies
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OFDM
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Keynote speech, entitled "POPS-OFDM: Ping-Pong Optimized Pulse Shaping OFDM for 5G Cellular Systems and Beyond," presented at the 2015 International Symposium on Networks, Computers and Communications (ISNCC'2015), held in Hammamet, Tunisia, in May 2015
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Efficient resource allocation for device to-device
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SSD 2015 Presentation, POPS-OFDM: Ping-pong Optimized Pulse Shaping OFDM for ...
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Similar to Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier
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The document proposes a new system for quantum cryptography network communication using optical tweezers generated via a nonlinear modified add/drop interferometer. Dark solitons and Gaussian pulses are introduced to generate multiple optical potential wells representing secured binary codes. These coded potential wells can be transmitted through different time slots in a time division multiple access system for high-capacity secure data transmission. Narrow output pulses of 9.57 nm and 8 nm were obtained from the drop and through ports, which were then combined and used to generate multiplexed potential well signals with 0.8 nm width and 5 nm frequency spacing for transmitting digital codes to network users via different fiber lengths.
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RF signal generation and wireless transmission using PANDA and Add/drop systems
RF signal generation and wireless transmission using PANDA and Add/drop systemsUniversity of Malaya (UM)
The radio frequency (RF) signal generation and its modulation is the basic building
block of wireless communication system. High frequency RF signals are desired in high speed
systems but traditional methods to generate high frequency RF signals suffered from electronic
devices data processing rate. On the other hand, spectral efficient modulation is also played vital
rule in the high speed wireless communication where orthogonal frequency-division multiplexing
(OFDM) transmission is mostly preferred. Due to the challenges regarding to electronic devices,
optically generation and processing of RF OFDM signals has gained considerable attention. In this
work microring resonator (MRR) system is used to implement all optically generation and
modulation of RF OFDM signal. The MRRs can be used as filter devices where generation of high
frequency (GHz) soliton signals as single and multi-carrier can be performed using suitable system
parameters. The results show the generation of 64 multi-carriers evenly spaced in the range from
54.09 GHz to 55.01 GHz to generate OFDM signal all optically, where the RF modulation was
achieved by two optical carriers with free spectral range (FSR)=5GHz.Channel Estimation Techniques in MIMO-OFDM LTE SystemsCauses and Effects of C...
There is an increasing demand for high data transmission rates with the evolution of the very large scale integration (VLSI) technology. The multiple input multiple output-orthogonal frequency division multiplexing (MIMO-OFDM) systems are used to fulfill these requirements because of their unique properties such as high spectral efficiency, high data rate and resistance towards multipath propagation. MIMO-OFDM systems are finding their applications in the modern wireless communication systems like IEEE 802.11n, 4G and LTE. They also offer reliable communication with the increased coverage area. The bottleneck to the MIMO-OFDM systems is the estimation of the channel state information (CSI). This can be estimated with the help of any one of the Training Based, Semiblind and Blind Channel estimation algorithms. This paper presents various channel estimation algorithms, optimization techniques and their effective utilization in MIMO-OFDM for modern wireless LTE systems.
Decimal convertor application for optical wireless communication by generatin...
Decimal convertor application for optical wireless communication by generatin...University of Malaya (UM)
This document proposes a system to generate dark and bright optical soliton pulses for use in secure wireless communication networks. It uses microring resonators to generate multiple wavelengths of optical pulses. These pulses are then sent through a polarization control system to encode them as quantum codes using dark and bright solitons. The soliton pulses can then be converted to digital logic codes using a decimal converter and transmitted securely over wireless networks. The system is able to generate multi-wavelength soliton pulses ranging from 1.55 to 1.56 micrometers with a full width at half maximum of 10 picometers and a free spectral range of 600 picometers.Decimal Convertor Application for Optical Wireless Communication by Generatin...
Decimal Convertor Application for Optical Wireless Communication by Generatin...University of Malaya (UM)
Two systems consist of microring resonators (MRRs) and an add/drop filter are used to generate signals as localized multi wavelengths. Quantum dense encoding
can be performed by output signals of selected wavelengths incorporated to a polarization control system. Therefore dark and bright optical soliton pulses
with different time slot are generated. They can be converted into digital logic quantum codes using a decimal convertor system propagating along a wireless networks. Results show that multi soliton wavelength, ranged from 1.55 m to 1.56 m with FWHM and FSR of 10 pm and 600 pm can be generated respectively. Keywords- Micro Ring Resonator, Quantum Dense Coding (QDC), Wireless network communication system.Bi36358362
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.
ELH – 3.1: ADVANCED DIGITAL COMMUNICATION UNIT – I Digital modulation techniq...
Digital modulation techniques: Digital modulation formats, Coherent binary modulation techniques, Coherent quadrature – modulation techniques, Non-coherent binary modulation techniques, Comparison of binary and quaternary modulation techniques, M-ray modulation techniques, Power spectra, Bandwidth efficiency, M-array modulation formats viewed in the light of the channel capacity theorem, Effect of inter symbol interference, Bit verses symbol error probabilities, Synchronization, Applications.
Oc3424632467
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.
Radio over fiber system based on a hybrid link for next generation of optical...
Radio over fiber technology will play an important role in solving problems facing wireless technology. Envisaging a global village, people could transmit and receive “anytime, anywhere, and anything”. In addition, the explosive growth in internet applications such as the World Wide Web, demonstrates the tremendous increase in bandwidth and low power that the coming world of multimedia interactive applications will require from future networks. ROF technology uses multicarrier modulation like orthogonal frequency division multiplexing (OFDM), which provides an opportunity of having an increased in bandwidth together with an affordable cost and this idea has recently become a suitable topic for many research works. On the other hand, SAC-OCDMA (Spectral Amplitude Coding Optical Code Division Multiple Access) technique is able to enhance the data rate of system and increase the number of user. In this paper we introduce a ROF link using a hybrid OFDM/SAC-OCDMA technique.
Ultra-short Multi Soliton Generation for Application in Long Distance Commun...
Ultra-short Multi Soliton Generation for Application in Long Distance Commun...University of Malaya (UM)
Generation of picometer optical soliton pulses is investigated using a nonlinear PANDA ring resonator system connecting to an add/drop filter system. The objectives of the research are to employ systems of microring resonator (MRR) to generate binary signals to be carried out along fiber optic communication. Effective parameters such as refractive indices of a silicon waveguide, coupling coefficients (), coupling loss, radius of the ring (R) and the input power can be selected properly to operate the nonlinear behavior. The input Gaussian laser pulses with power of 600 mW are inserted into the system. The central wavelength of the input power has been selected to λ0=1.55 µm where the nonlinear refractive index of the medium is n2=2.6×10−17 m2 W−1. Therefore binary signals generated by the add/drop filter system can be converted to secure codes where the decoding process of the transmitted codes can be obtained at the final step. Here, multi soliton pulses with full width at half maximum (FWHM) of 325 could be generated, converted to secure codes and finally detected over 70 km optical fiber communication link.Improved linearization of laser source and erbium doped
This document discusses techniques to reduce nonlinear distortion in Radio over Fiber (RoF) systems. It summarizes:
1) Predistortion is used to reduce nonlinearity introduced by the laser source. By introducing a predistortion circuit in front of the laser, its nonlinearity can be reduced.
2) Feedforward technique is employed to reduce nonlinear distortion in erbium doped fiber amplifiers (EDFAs).
3) Both techniques are analyzed individually and their combined effect is investigated to minimize nonlinear distortion in RoF systems.
Performance Analysis of OFDM in Combating Multipath Fading
Mobile Communication system has been on high rampage for high data transmission over wireless
medium with various challenges caused by the transmission Channel. OFDM is been discovered in recent years
to deal with this problems because of its ability to elegantly cope with multipath interference. This paper
investigates the performance of different modulation schemes using M-ary Phase Shift Keying (M-PSK) and Mary
Quadrature Amplitude Modulation (M-QAM) in information transmission with OFDM technique over Ideal
channel AWGN and worst channel Rayleigh Fading channel in terms of Bits Error Rate (BER). Analysis was
made for different types of modulation schemes BPSK, QPSK, 4-QAM and 16-QAM gray coded bit mapping.
Also, a feasibility of OFDM been used to combat multipath fading was analyzed with comparison between a
single carrier technique and OFDM multicarrier technique. Variation between SNR results with respect to BER
is plotted to show the trade off differences between the modulation schemes with the result showing that OFDM
allows data transmission with minimal error over fading channel than a Single Carrier
Performance Analysis of OFDM in Combating Multipath Fading
Abstract: Mobile Communication system has been on high rampage for high data transmission over wireless medium with various challenges caused by the transmission Channel. OFDM is been discovered in recent years to deal with this problems because of its ability to elegantly cope with multipath interference. This paper investigates the performance of different modulation schemes using M-ary Phase Shift Keying (M-PSK) and M-ary Quadrature Amplitude Modulation (M-QAM) in information transmission with OFDM technique over Ideal channel AWGN and worst channel Rayleigh Fading channel in terms of Bits Error Rate (BER). Analysis was made for different types of modulation schemes BPSK, QPSK, 4-QAM and 16-QAM gray coded bit mapping. Also, a feasibility of OFDM been used to combat multipath fading was analyzed with comparison between a single carrier technique and OFDM multicarrier technique. Variation between SNR results with respect to BER is plotted to show the trade off differences between the modulation schemes with the result showing that OFDM allows data transmission with minimal error over fading channel than a Single Carrier. Keywords: OFDM, Single Carrier, AWGN, Rayleigh fading, BER, M-ary PSK, M-ary QAM
G41064754
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.
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
This document provides an overview of OFDM-MIMO technology for high-speed wireless communication. It discusses how OFDM divides a high-rate data stream into parallel lower-rate substreams that are transmitted over multiple carriers. MIMO is then used to further improve data rates and quality of service by exploiting multiple antennas at the transmitter and receiver. The document also describes V-BLAST, an algorithm used in MIMO systems to separate simultaneously transmitted signals at the receiver through ordered cancellation.
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
This document provides an overview of OFDM-MIMO technology for high-speed wireless communication. It discusses how OFDM divides a high-rate data stream into parallel lower-rate substreams that are transmitted over multiple carriers. MIMO is then used to further improve data rates and quality of service by exploiting multiple antennas at the transmitter and receiver. The document also describes V-BLAST, an algorithm used in MIMO systems to separate simultaneously transmitted signals at the receiver through ordered cancellation.
Generating of 57-61 GHz Frequency Band Using a Panda Ring Resonator
A system of microring resonator (MRR) conected to an optical panda ring
resonator is presented. The optical soliton pulse of 57-61 GHz frequency band can be
generated and used for aplications in optical communications. The system uses a Gausian
laser pulse propagating within a nonlinear MRRs system. The ultra short single and multi
optical soliton pulses within the range of 57-61 GHz can be generated and sen at he through
and drop ports of the system. This range is aplicable for a short distance optical
communication such as indor systems. The generated optical soliton pulses have the
bandwidth of 5 and 20 MHz.
Optical Quantum Generation and Transmission of 57–61 GHz Frequency Band Using...
Optical Quantum Generation and Transmission of 57–61 GHz Frequency Band Using...University of Malaya (UM)
An optical panda ring resonator connecting to two microring resonators (MRRs) can be used to
generate a high frequency optical soliton. The optical soliton pulse of 57–61 GHz can be generated
and transmitted via an optical quantum transmission link. This system uses a Gaussian laser pulse
propagating within a nonlinear MRRs system. The ultra-short single and multi soliton pulses within
the range of 57–61 GHz can be generated and seen at the through and drop ports of the system.
The transmission link consists of MRRs system, optical transmitter, connector, fiber optics, erbium
doped fiber amplifier (EDFA), receiver and antenna which provide transmission of optical soliton via
the wired/wireless communications. The fiber optic has a length of 1 km, where the wireless link
covers a short distance optical communication of 10 m. Here, the transmitted optical soliton pulses
can be received, detected and used by the users.
Similar to Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier (20)
Secured binary codes generation for computer network communication
Secured binary codes generation for computer network communication
Wavelet-based sensing technique in cognitive radio network
Wavelet-based sensing technique in cognitive radio network
Implementation of Direct Sequence Spread Spectrum Communication System Using ...
Implementation of Direct Sequence Spread Spectrum Communication System Using ...
RF signal generation and wireless transmission using PANDA and Add/drop systems
RF signal generation and wireless transmission using PANDA and Add/drop systems
Channel Estimation Techniques in MIMO-OFDM LTE SystemsCauses and Effects of C...
Channel Estimation Techniques in MIMO-OFDM LTE SystemsCauses and Effects of C...
Decimal convertor application for optical wireless communication by generatin...
Decimal convertor application for optical wireless communication by generatin...
Decimal Convertor Application for Optical Wireless Communication by Generatin...
Decimal Convertor Application for Optical Wireless Communication by Generatin...
ELH – 3.1: ADVANCED DIGITAL COMMUNICATION UNIT – I Digital modulation techniq...
ELH – 3.1: ADVANCED DIGITAL COMMUNICATION UNIT – I Digital modulation techniq...
Radio over fiber system based on a hybrid link for next generation of optical...
Radio over fiber system based on a hybrid link for next generation of optical...
Ultra-short Multi Soliton Generation for Application in Long Distance Commun...
Ultra-short Multi Soliton Generation for Application in Long Distance Commun...
Improved linearization of laser source and erbium doped
Improved linearization of laser source and erbium doped
Performance Analysis of OFDM in Combating Multipath Fading
Performance Analysis of OFDM in Combating Multipath Fading
Performance Analysis of OFDM in Combating Multipath Fading
Performance Analysis of OFDM in Combating Multipath Fading
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
Ofdm mimo and v-blast algorithm-key to high speed wireless communication
Generating of 57-61 GHz Frequency Band Using a Panda Ring Resonator
Generating of 57-61 GHz Frequency Band Using a Panda Ring Resonator
Optical Quantum Generation and Transmission of 57–61 GHz Frequency Band Using...
Optical Quantum Generation and Transmission of 57–61 GHz Frequency Band Using...
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In this work, we propose the technique that can be used to trap/delivery bio-cell by using the concept of dark solitons and potential well, in which the trapping force is formed by using the intense optical vortices generated within the series ring and the PANDA ring resonator, the microscopic bio-cell can be trapped and moved dynamically, in which the valley of the dark soliton is generated and controlled within the PANDA ring resonator by the control port signals.ASK-to-PSK Generation based on Nonlinear Microring Resonators Coupled to One ...
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In this paper, a novel system of simultaneous optical logic AND and OR gates using dark -bright soliton conversion within the add/drop optical filter system is proposed. The input logic „0‟ and control logic „0‟ are formed by using the dark soliton pulse (D) trains. By using the dark-bright soliton conversion behavior within the π/2 phase shift device, we found that the simultaneous optical logic AND and OR gates at the drop and through ports can be randomly formed, respectively.Simulation and Analysis of Multisoliton Generation Using a PANDA Ring Resonat...
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A novel system of multisoliton generation using nonlinear equations of the propagating signals is presented. This system uses a PANDA ring resonator incorporated with an add/drop filter system. Using resonant conditions, the intense optical fields known as multisolitons can be generated and propagated within a Kerr-type nonlinear medium. The present simulation results show that multisolitons can be controlled by using additional Gaussian pulses input into the add port of the PANDA system. For the soliton pulse in the microring device, a balance should be achieved between dispersion and nonlinear lengths. Chaotic output signals from the PANDA ring resonator are input into the add/drop filter system. Chaotic signals can be filtered by using the add/drop filter system, in which multi dark and bright solitons can be generated. In this work multi dark and bright solitons with an FWHM and an FSR of 425pm and 1.145 nm are generated, respectively, where the Gaussian pulse with a central wavelength of 1.55 μm and power of 600 mW is input into the system.Generation of Quantum Photon Information Using Extremely Narrow Optical Tweez...
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A system of microring resonator (MRR) is presented to generate extremely narrow optical tweezers. An add/drop filter system consisting of one centered ring and one smaller ring on the left side can be used to generate extremely narrow pulse of optical tweezers. Optical tweezers generated by the dark-Gaussian behavior propagate via the MRRs system, where the input Gaussian pulse controls the output signal at the drop port of the system. Here the output optical tweezers can be connected to a quantum signal processing system (receiver), where it can be used to generate high capacity quantum codes within series of MRR’s and an add/drop filter. Detection of the encoded signals known as quantum bits can be done by the receiver unit system. Generated entangled photon pair propagates via an optical communication link. Here, the result of optical tweezers with full width at half maximum (FWHM) of 0.3 nm, 0.8 nm and 1.6 nm, 1.3 nm are obtained at the through and drop ports of the system respectively. These results used to be transmitted through a quantum signal processor via an optical computer network communication link.Cryptography Scheme of an Optical Switching System Using Pico/Femto Second So...
Cryptography Scheme of an Optical Switching System Using Pico/Femto Second So...University of Malaya (UM)
We propose a system of microring resonators (MRRs) incorporating with an add/drop filter system. Optical soliton can be simulated and used to generate entangled photon, applicable in single and multiple optical switching. Chaotic signals can be generated via the MRRs system. Therefore continuous spatial and temporal signals are generated spreading over the spectrum. Polarized photons are formed incorporating the
polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed. Results show the single soliton pulse of 0.7 ps where the multi soliton pulse with FSR and FWHM of 0.6 ns and 20 ps are generated using the add/drop filter system. Here Ultra-short single soliton pulse with FWHM=42 fs can be simulated. These pulses are providing required communication signals to generate pair of polarization entangled photons among different time frame where the polarization control unit and polarizer beam splitter (PBS) are connected to the ring resonator system.Frequency-Wavelength Trapping by Integrated Ring Resonators For Secured Netwo...
Frequency-Wavelength Trapping by Integrated Ring Resonators For Secured Netwo...University of Malaya (UM)
Optical pulse trapping via a series of microring resonator (MRR) is presented. Large bandwidth of optical soliton is generated by input pulse propagating within the MRRs. Distinguished discrete wavelength or frequency pulses can be generated by using localized spatial pulses via a networks communication system. Quantum codes can be generated by using a polarization control unit and a beam splitter, incorporating to the MRRs. Here frequency band of 10.7 MHz and 16 MHz and wavelengths of 206.9 nm, 1448 nm, 2169 nm and 2489 nm are localized and obtained and used for quantum codes generation applicable for secured networks communication.Dark-Bright Solitons Conversion System for Secured and Long Distance Optical ...
Dark-Bright Solitons Conversion System for Secured and Long Distance Optical ...University of Malaya (UM)
We suggest a new purpose of a security scheme by employing the nonlinear behaviors of temporal dark and bright solitons amongst a micro-ring resonator system for signal security application. The chaotic signal is generated, where the required bright soliton pulse can be recovered and discovered by an add/drop filtering device. By using the reserve ring parameters, simulation results obtained have demonstrated that the soliton conversion can be performed. In application, the chaotic signal is generated and formed by the dark soliton inside a nonlinear micro-ring device. The different temporal soliton response time can be seen, the response times of 169 and 84 ns are mentioned for temporal dark and bright solitons, respectively, which can also be used to figure the security key. The technique of optical conversion can be use to improve the optical communication network systems.Secured Transportation of Quantum Codes Using Integrated PANDA-Add/drop and T...
Secured Transportation of Quantum Codes Using Integrated PANDA-Add/drop and T...University of Malaya (UM)
New system of quantum cryptography for communication networks is proposed. Multi optical Soliton can be generated and propagated via an add/drop interferometer system incorporated with a time division multiple access (TDMA) system. Here the transportation of quantum codes is performed. Chaotic output signals from the PANDA ring resonator are inserted into the add/drop filter system. Using the add/drop filter system multi dark and bright solitons can be obtained and used to generate entangled quantum codes for internet security. In this research soliton pulses with FWHM and FSR of 325 pm and 880 nm are generated, respectively.Determination Of Fwhm For Solition Trapping
In this study an interesting system in which a bright and dark soliton pulse can be stopped inside a nonlinear waveguide is presented. Here, we propose a system consisting of a series of ring resonators for optical trapping within a nonlinear waveguide. The bright and dark solitons can be controlled and slowed down within the waveguide. The FWHM for the output signals are calculated and used as an optical memory. Bright and dark soliton behaviors within a micro and nano ring resonator are also investigated and described. The required pulse is filtered and amplified, can be controlled and localized within the system. The localized bright and dark solitons are stopped by controlling the input power,which means that the photon stopping can be controlled by light in a ring resonator.
A Study oF Dynamic Optical Tweezers Generation For Communication Networks
We propose a novel system of the dynamic optical tweezers generated by a dark soliton in the fiber optic loop. A dark soliton known as an optical tweezer is amplified and tuned within the microring resonator (MRR) system. The required tunable tweezers with different widthsand powers can be controlled. The analysis of dark-bright soliton conversion using a dark soliton pulse propagating within a MRR is analyzed. The control dark soliton is input into the system via the add port of the add/drop filter. The dynamic behavior of the dark-brightsoliton conversion is observed. The required stable signal is obtained via a drop and throughput ports of the add/drop filter with some suitable parameters. In application, generation of optical tweezers and transportation can be realized by using the proposed system, where the communication network is performed.
15
A molecular cryptography technique using optical tweezers, is proposed. The optical tweezer transports the molecules in the communication system. The optical tweezer generated by the dark soliton is in the form of a potential well. The dark soliton propagates inside nonlinear microring resonator (NMRR). Transportation of molecules is implemented when the dark soliton is used as input pulse. The input bright soliton control the output signal at the drop port of the system. Output optical tweezers can be connected to the quantum signal processing system consisting of transmitter and the receiver. The transmitter is used to generate the high capacity quantum codes within the series of MRR’s and anadd/drop filter. The receiver will detect the encoded signals known as quantum bits. The transmitter will generate the entangled photon pair which propagates via an optical communication link. Here the smallest optical tweezer with respect to the full width at half maximum FWHM is 17.6 nm in the formof potential well is obtained and transmitted through quantum signal processor via an optical link.
Controlling Nonlinear Behavior of a SMRR for Network System Engineering
This research is used to control the nonlinear behavior of silicon microring resonators, MRR’s such as chaos and bifurcation. Increasing of nonlinear refractive indices, coupling coefficients and radius of the SMRR leads to descend input power and round trips wherein the bifurcation occurs. As result, bifurcation or chaos behaviors are seen at lower input power of 44 W, where the nonlinear refractive index is n2=3.2×10−20 m2/W. Smallest round trips can be seen for the R=40 µm and 0.1 respectively. Signals from the SMRR are passing through a polarizer beam splitter to generate quantum
binary codes which are used in wireless network communication.
Long Distance Communication Using Localized Optical Soliton via Entangled Ph...
Long Distance Communication Using Localized Optical Soliton via Entangled Ph...University of Malaya (UM)
A system of microring resonators (MRRs) is presented to generation entangled photon. Different time slot for continuous variable quantum key distribution (CVQKD) use is applicable in optical wireless link. Chaotic behavior of a soliton pulse within the device can be presented respect to the Kerr nonlinear type of light in the MRR devices. Continuous spatial and temporal signals are generated spreading over the spectrum. The CVQKD is formed using the localized spatial soliton pulse. Here localized temporal soliton with FWHM and FSR of 0.2 ps and 0.58 ns is obtained respectively. The spatial soliton pulse has a FWHM of 80 pm. Transmission of soliton pulse with FWHM of 1.5 ps is simulated along the long distance fiber optics where the polarized photons are formed incorporating with the polarization control unit into the MRRs, which allows different time slot entangled photons to be randomly formed.Optical Wired/Wireless Communication Using Soliton Optical Tweezers
The aim of this study is to generate nano optical tweezers to be connected to an optical quantum signal processing system in order to transmit quantum photon via an optical communication link. A system of microring resonator (MRR) known as Half-Panda is proposed to generate nano optical tweezers. Optical tweezers can be used to transport molecules in a communication link. The dark soliton propagates inside nonlinear MRR. Transportation of molecules or photons is implemented when the dark soliton is used as input pulse. The input Gaussian soliton is used to control the output signal at the through and drop ports of the system. Output nano optical tweezers can be connected to the quantum signal processing system consisting of a receiver and transmitter. The receiver will detect the signals of optical tweezers and transmit them via wired/wireless as quantum bits. The transmitter will generate the entangled photon pair which propagates via an optical communication link. Here the smallest nano optical tweezers signals with width at half maximum (FWHM) of 4.2 nm is obtained where the free spectrum range (FSR) of 50 nm is simulated.
Single Soliton Bandwidth Generation and Manipulation by Microring Resonator
Single Soliton Bandwidth Generation and Manipulation by Microring ResonatorUniversity of Malaya (UM)
This document describes a system for generating and manipulating chaotic signals and single soliton pulses using a microring resonator (MRR) fiber optic system connected to an add/drop filter. When light from a laser diode is fed back into the fiber ring resonator, chaotic signals are produced based on the ring resonator parameters and input power level. Single soliton pulses can be generated and their bandwidth manipulated by the add/drop filter system. Results show that increasing the coupling coefficients of the add/drop filter leads to increased bandwidth of the generated single pulses. The system demonstrates potential applications by controlling nonlinear behaviors in the fiber ring resonator.NEW SYSTEM OF CHAOTIC SIGNAL GENERATION BASED ON COUPLING COEFFICIENTS APPLI...
NEW SYSTEM OF CHAOTIC SIGNAL GENERATION BASED ON COUPLING COEFFICIENTS APPLI...University of Malaya (UM)
The nonlinear behavior (chaotic) of light traveling in an optical fiber ring resonator such as an add/drop system
is presented. The chaotic behavior is considered to be a beneficial effect that can be used in the communication
system. Such a system can be used to secure the information signals, therefore, the ability of chaotic carriers to synchronize in a communication system is performed. The used optical material is InGaAsP/InP regarding to suitable parameters of the system. The nonlinear refractive index is fixed to n2 = 3.8 × 10−20 m2
/W, and the 20,000 iterations of round-trip within the system is simulated. The input powers are selected at 1 W, where the coupling coefficient of the system varies according to two critical cases, where 0 0.1
and 0.1 1. As a results, larger coupler coefficient corresponds to lower input power for the case of
0 0.1 and smaller coupling coefficient of the system is corresponds to lower input power when
0.1 1. To optimize the microring systems, Lower input power is recommended in many applications in optical optical communication systems.Chaotic Signal Generation and Trapping Using an Optical Transmission Link
Chaotic soliton can be generated using a nonlinear PANDA system. The research uses microring resonator
(MRR) to generate and trap chaotic signals along fiber optic communication. The parameters such as refractive
indices of a silicon waveguide, coupling coefficients ( ), coupling loss, radius of the ring (R) and the input power can be selected properly to operate the nonlinear behavior. The input Gaussian laser pulses with power of 0.45 W are inserted into the system. The central wavelength of the input power has been selected to λ0=1.55 µm where the nonlinear refractive index of the medium is n2=1.3×10−17 m2 W−1
. The generated chaotic signals with Full at Half
Maximum of 24 pm can be transmitted along the fiber optic with length of 195 km. The trapping of chaotic signals can be obtained at the end of the transmission link. Here signals with 600 fm bandwidth could be trapped within the system.
LOGIC CODES GENERATION AND TRANSMISSION USING AN ENCODING-DECODING SYSTEM
Nonlinear behaviors of light such as chaos can be observed during propagation of a Gaussian laser beam inside a single ring resonator system. Chaotic signals can be employed to generate data of logic codes to be transmitted along the fiber optic communication. Controlling of the chaotic signals can be implemented by the parameter of the system such as coupling coefficient, the ring’s radius, coupling loss and input power. The central wavelength of the input Gaussian laser pulse has been selected to λ0=1550 nm where the nonlinear refractive index of the medium is n2=1.4×10−13 m2 W−1. Therefore the data of logic codes generated by the single ring resonator system can be converted to transmitting secured codes where the decoding process of the transmitted codes can be obtained at the end of the transmission link. Here generation of logic code of “101010101011010101011101011110101101010101010110101” is performed, encoded and decoded over 50 km fiber optics. Thus secured transmitting of signals can be obtained along the long distance fiber
communication.
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All-optical logic XOR/XNOR gate operation using microring and nanoring reson...
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Cryptography Scheme of an Optical Switching System Using Pico/Femto Second So...
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Frequency-Wavelength Trapping by Integrated Ring Resonators For Secured Netwo...
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A Study oF Dynamic Optical Tweezers Generation For Communication Networks
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Controlling Nonlinear Behavior of a SMRR for Network System Engineering
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Long Distance Communication Using Localized Optical Soliton via Entangled Ph...
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Optical Wired/Wireless Communication Using Soliton Optical Tweezers
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NEW SYSTEM OF CHAOTIC SIGNAL GENERATION BASED ON COUPLING COEFFICIENTS APPLI...
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ESA/ACT Science Coffee: Diego Blas - Gravitational wave detection with orbita...
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Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
Abstract:
In this talk I will describe some recent ideas to find gravitational waves from supermassive black holes or of primordial origin by studying their secular effect on the orbital motion of the Moon or satellites that are laser ranged.Discovery of An Apparent Red, High-Velocity Type Ia Supernova at 𝐳 = 2.9 wi...
We present the JWST discovery of SN 2023adsy, a transient object located in a host galaxy JADES-GS
+
53.13485
−
27.82088
with a host spectroscopic redshift of
2.903
±
0.007
. The transient was identified in deep James Webb Space Telescope (JWST)/NIRCam imaging from the JWST Advanced Deep Extragalactic Survey (JADES) program. Photometric and spectroscopic followup with NIRCam and NIRSpec, respectively, confirm the redshift and yield UV-NIR light-curve, NIR color, and spectroscopic information all consistent with a Type Ia classification. Despite its classification as a likely SN Ia, SN 2023adsy is both fairly red (
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(
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−
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)
∼
0.9
) despite a host galaxy with low-extinction and has a high Ca II velocity (
19
,
000
±
2
,
000
km/s) compared to the general population of SNe Ia. While these characteristics are consistent with some Ca-rich SNe Ia, particularly SN 2016hnk, SN 2023adsy is intrinsically brighter than the low-
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Ca-rich population. Although such an object is too red for any low-
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cosmological sample, we apply a fiducial standardization approach to SN 2023adsy and find that the SN 2023adsy luminosity distance measurement is in excellent agreement (
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1
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) with
Λ
CDM. Therefore unlike low-
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Ca-rich SNe Ia, SN 2023adsy is standardizable and gives no indication that SN Ia standardized luminosities change significantly with redshift. A larger sample of distant SNe Ia is required to determine if SN Ia population characteristics at high-
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在线办理(salfor毕业证书)索尔福德大学毕业证毕业完成信一模一样
学校原件一模一样【微信：741003700 】《(salfor毕业证书)索尔福德大学毕业证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
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二.真实使馆公证(即留学回国人员证明,不成功不收费)
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留信网认证的作用:
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2:同时对留学生所学专业登记给予评定
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Alternate Wetting and Drying - Climate Smart Agriculture
Alternate Wetting and Drying - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Alternate Wetting and Drying presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024. Male reproduction physiology by Suyash Garg .pptx
Physiology of Male reproduction.
Video mentioned at page no. 23 as summary for better understanding
Evidence of Jet Activity from the Secondary Black Hole in the OJ 287 Binary S...
Wereport the study of a huge optical intraday flare on 2021 November 12 at 2 a.m. UT in the blazar OJ287. In the binary black hole model, it is associated with an impact of the secondary black hole on the accretion disk of the primary. Our multifrequency observing campaign was set up to search for such a signature of the impact based on a prediction made 8 yr earlier. The first I-band results of the flare have already been reported by Kishore et al. (2024). Here we combine these data with our monitoring in the R-band. There is a big change in the R–I spectral index by 1.0 ±0.1 between the normal background and the flare, suggesting a new component of radiation. The polarization variation during the rise of the flare suggests the same. The limits on the source size place it most reasonably in the jet of the secondary BH. We then ask why we have not seen this phenomenon before. We show that OJ287 was never before observed with sufficient sensitivity on the night when the flare should have happened according to the binary model. We also study the probability that this flare is just an oversized example of intraday variability using the Krakow data set of intense monitoring between 2015 and 2023. We find that the occurrence of a flare of this size and rapidity is unlikely. In machine-readable Tables 1 and 2, we give the full orbit-linked historical light curve of OJ287 as well as the dense monitoring sample of Krakow.
The cost of acquiring information by natural selection
This is a short talk that I gave at the Banff International Research Station workshop on Modeling and Theory in Population Biology. The idea is to try to understand how the burden of natural selection relates to the amount of information that selection puts into the genome.
It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
JAMES WEBB STUDY THE MASSIVE BLACK HOLE SEEDS
The pathway(s) to seeding the massive black holes (MBHs) that exist at the heart of galaxies in the present and distant Universe remains an unsolved problem. Here we categorise, describe and quantitatively discuss the formation pathways of both light and heavy seeds. We emphasise that the most recent computational models suggest that rather than a bimodal-like mass spectrum between light and heavy seeds with light at one end and heavy at the other that instead a continuum exists. Light seeds being more ubiquitous and the heavier seeds becoming less and less abundant due the rarer environmental conditions required for their formation. We therefore examine the different mechanisms that give rise to different seed mass spectrums. We show how and why the mechanisms that produce the heaviest seeds are also among the rarest events in the Universe and are hence extremely unlikely to be the seeds for the vast majority of the MBH population. We quantify, within the limits of the current large uncertainties in the seeding processes, the expected number densities of the seed mass spectrum. We argue that light seeds must be at least 103 to 105 times more numerous than heavy seeds to explain the MBH population as a whole. Based on our current understanding of the seed population this makes heavy seeds (Mseed > 103 M⊙) a significantly more likely pathway given that heavy seeds have an abundance pattern than is close to and likely in excess of 10−4 compared to light seeds. Finally, we examine the current state-of-the-art in numerical calculations and recent observations and plot a path forward for near-future advances in both domains.
Sustainable Land Management - Climate Smart Agriculture
Sustainable Land Management - Climate Smart AgricultureInternational Food Policy Research Institute- South Asia Office
PPT on Sustainable Land Management presented at the three-day 'Training and Validation Workshop on Modules of Climate Smart Agriculture (CSA) Technologies in South Asia' workshop on April 22, 2024.
快速办理(UAM毕业证书)马德里自治大学毕业证学位证一模一样
学校原件一模一样【微信：741003700 】《(UAM毕业证书)马德里自治大学毕业证学位证》【微信：741003700 】学位证，留信认证（真实可查，永久存档）原件一模一样纸张工艺/offer、雅思、外壳等材料/诚信可靠,可直接看成品样本，帮您解决无法毕业带来的各种难题！外壳，原版制作，诚信可靠，可直接看成品样本。行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备。十五年致力于帮助留学生解决难题，包您满意。
本公司拥有海外各大学样板无数，能完美还原。
1:1完美还原海外各大学毕业材料上的工艺：水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠。文字图案浮雕、激光镭射、紫外荧光、温感、复印防伪等防伪工艺。材料咨询办理、认证咨询办理请加学历顾问Q/微741003700
【主营项目】
一.毕业证【q微741003700】成绩单、使馆认证、教育部认证、雅思托福成绩单、学生卡等！
二.真实使馆公证(即留学回国人员证明,不成功不收费)
三.真实教育部学历学位认证（教育部存档！教育部留服网站永久可查）
四.办理各国各大学文凭(一对一专业服务,可全程监控跟踪进度)
如果您处于以下几种情况：
◇在校期间，因各种原因未能顺利毕业……拿不到官方毕业证【q/微741003700】
◇面对父母的压力，希望尽快拿到；
◇不清楚认证流程以及材料该如何准备；
◇回国时间很长，忘记办理；
◇回国马上就要找工作，办给用人单位看；
◇企事业单位必须要求办理的
◇需要报考公务员、购买免税车、落转户口
◇申请留学生创业基金
留信网认证的作用:
1:该专业认证可证明留学生真实身份
2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Mending Clothing to Support Sustainable Fashion_CIMaR 2024.pdf
Ozturkcan, S., Berndt, A., & Angelakis, A. (2024). Mending clothing to support sustainable fashion. Presented at the 31st Annual Conference by the Consortium for International Marketing Research (CIMaR), 10-13 Jun 2024, University of Gävle, Sweden.
fermented food science of sauerkraut.pptx
This ppt contains the production of a fermented food name - sauerkraut
Immersive Learning That Works: Research Grounding and Paths Forward
We will metaverse into the essence of immersive learning, into its three dimensions and conceptual models. This approach encompasses elements from teaching methodologies to social involvement, through organizational concerns and technologies. Challenging the perception of learning as knowledge transfer, we introduce a 'Uses, Practices & Strategies' model operationalized by the 'Immersive Learning Brain' and ‘Immersion Cube’ frameworks. This approach offers a comprehensive guide through the intricacies of immersive educational experiences and spotlighting research frontiers, along the immersion dimensions of system, narrative, and agency. Our discourse extends to stakeholders beyond the academic sphere, addressing the interests of technologists, instructional designers, and policymakers. We span various contexts, from formal education to organizational transformation to the new horizon of an AI-pervasive society. This keynote aims to unite the iLRN community in a collaborative journey towards a future where immersive learning research and practice coalesce, paving the way for innovative educational research and practice landscapes.
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Centrifugation is a powerful technique used in laboratories to separate components of a heterogeneous mixture based on their density. This process utilizes centrifugal force to rapidly spin samples, causing denser particles to migrate outward more quickly than lighter ones. As a result, distinct layers form within the sample tube, allowing for easy isolation and purification of target substances.
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Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier
- 1. Published in IET Communications Received on 29th January 2013 Revised on 18th December 2013 Accepted on 23rd January 2014 doi: 10.1049/iet-com.2013.0077 ISSN 1751-8628 Transmission of data with orthogonal frequency division multiplexing technique for communication networks using GHz frequency band soliton carrier 2, A.H. Yazdavar2, S. Ghorbani2, S.E. Alavi3, S.M. Idrus3, J. Ali1 1 Institute of Advanced Photonics Science, Nanotechnology Research Alliance, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Malaysia 2 Faculty of Computing, Universiti Teknologi Malaysia (UTM), Johor Bahru 81310, Malaysia 3 Lightwave Communication Research Group, Faculty of Electrical Engineering, Universiti Teknologi Malaysia (UTM), Skudai 81310, Johor, Malaysia Abstract: Microring resonators (MRRs) can be used to generate optical millimetre-wave solitons with a broadband frequency of 40–60 GHz. Non-linear light behaviours within MRRs, such as chaotic signals, can be used to generate logic codes (digital codes). The soliton signals can be multiplexed and modulated with the logic codes using an orthogonal frequency division multiplexing (OFDM) technique to transmit the data via a network system. OFDM uses overlapping subcarriers without causing inter-carrier interference. It provides both a high data rate and symbol duration using frequency division multiplexing over multiple subcarriers within one channel. The results show that MRRs support both single-carrier and multi-carrier optical soliton pulses, which can be used in an OFDM based on whether fast Fourier transform or discrete wavelet transform transmission/receiver system. Localised ultra-short soliton pulses within frequencies of 50 and 52 GHz can be seen at the throughput port of the panda system with respect to full-width at half-maximum (FWHM) and free spectrum range of 5 MHz and 2 GHz, respectively. The soliton pulses with FWHMs of 10 MHz could be generated at the drop port. Therefore, transmission of data information can be performed via a communication network using soliton pulse carriers and an OFDM technique. www.ietdl.org IET Commun., pp. 1–10 doi: 10.1049/iet-com.2013.0077 1 & The Institution of Engineering and Technology 2014 E-mail: sevia@fke.utm.my , M. EbrahimiI.S. Amiri1,3