Optical Communication MATLAB Projects

Direct Detection in Optical Communication Using Intensity Modulation using MATLAB

The concept of evaluating the filter impulse response of the digital equalizer to estimate all deterministic linear channel distortions such as residual chromatic dispersion (CD), polarization mode dispersion (PMD), and PDL has been proved in theory and by extensive simulation. The practicality of robust and precise estimation has been demonstrated over a wide range of combined distortions. Preceding investigations based on measured and simulated data are in agreement. Although the theory of the linear optical channel model provides comprehensive access to all desired parameters, many details of the practical implementation of estimation algorithms must be considered to obtain a precise and robust estimation. Estimates of statistical noise distortions have not been demonstrated. On the one hand, evaluating the mean value and variance of the signal z(t) to obtain an estimation of the SNR is simple; this is a valuable parameter for monitoring signal quality prior to the decision. However, as the MMSE solution jointly mitigates noise enhancement and inter-symbol interference, the variance of z(t) is also influenced by “unequalized” deterministic signal components. In particular, this is valid for deterministic nonlinear effects such as SPM that are interpreted as noise by the linear equalizer. In contrast to the ZF solution applicable in OFDM systems with training, where identification of OSNR and SPM- and XPM-induced nonlinear ties is possible, blind estimation based on MMSE does not allow for a reliable identification of noise sources.

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Using Matlab Tools for Simulation of the Optical Transmission Medium using MATLAB

This paper deals with simulation platform of optical transmission system in Matlab Simulink. A detailed mathematical methodology in order to accurately model parts of optical transmission system is presented. The simulation platform is suitable for simulation single channel optical transmission system. The selected approach takes into account noises that occurs on the parts of optical transmission system.

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Numerical Analysis of Orbital Angular Momentum based Next Generation Optical SDM Communications System using MATLAB

In this paper, we make a theoretical and numerical analysis of a transmission chain based on an Orbital Angular Momentum (OAM) technique in the case of ideal channel. In order to generate an OAM beam, we define a theoretical OAM encoder (vortex generator) similar to the Spiral Phase Pattern (SPP) in practice, converts a flat Gaussian phase front into a helix. We then multiplex several OAM channels, all modulated with QPSK streams of data and then decode specific modes and measure the overall performance in terms of signal to noise ratio (SNR) and bit error rate (BER).

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The Laser Satellites Communications and Laser Noises using MATLAB

The gain of advanced optical communication systems is reduced by the noise of optical source. Coherent optical communication systems are in particular very sensitive to the noise transmitter and local laser. Optical space communications is on the verge of being reality. The paper involves the introduction into laser satellite communication system. The paper includes briefly analysis, optimization, design and system level development of signal transferring between satellites.

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Simulation and Animation in Optical Fiber Communication using MATLAB

The fact that different frequencies of light travel at different speeds in the fiber is not confusing. It is in the implications where the difficulty arises. Specifically, the concept of group velocity is physically counterintuitive, and an analysis of the pulse spreading that results because of dispersion often includes a rigorous Fourier analysis. This paper describes how computer simulation and animation can provide a visual means of simplifying these concepts so that they are easier to understand.

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MATLAB Simulink Simulation Platform for Photonic Transmission Systems using MATLAB

High speed and ultra-high capacity optical communications have emerged as the essential techniques for backbone global information transmission networks. As the bit rate of the transmission system gets higher and higher 40 Gb/s to 100 Gb/s the modeling of proposed modulation techniques is very important so as to avoid costly practical demonstration. The search for a universal modeling platform for such systems is urgent. Matlab Simulink has become the universal mathematical and modeling tools in most universities and re-search laboratories around the world. This paper thus describes the modeling techniques for advanced photonic transmission systems and Simulink is proven to be very effective platform for development of photonic communications systems due its comprehensive blocksets. The simulation is based mainly on the physical phenomena and understanding of its concepts of communications and photonics. Simulink models are given as examples of various sub-systems of the photonic transmission systems. Some simulated trans-mission performances are demonstrated as examples of final results obtained from Simulink models of the transmission systems.

The Role of External Features in Face Recognition with Central Vision Loss using MATLAB

Contrary to people with normal vision who rely more on the internal features of face images for recognizing familiar faces, individuals with central vision loss show a higher dependence on using external features of face images.

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