coherent optical PSK systems
Receiver implemented RF pilot tone phase noise mitigation in coherent optical nPSK and nQAM systems
... Abstract: In this paper, a novel method for extracting an RF pilot carrier signal in the coherent receiver is presented. The RF carrier is used to mitigate the phase noise influence in n-level PSK and QAM ...
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EEPN and CD study for coherent optical nPSK and nQAM systems with RF pilot based phase noise compensation
... n-level PSK and QAM systems. The systems performance is influenced by the use of an RF pilot carrier to accomplish phase noise compensation through complex multiplication in combination with discrete ...
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Phase noise influence in coherent optical DnPSK systems with DSP based dispersion compensation
... around coherent optical communication systems based on semiconductor lasers as transmitter (Tx) and local oscillator (LO) was initiated around 1980 with lab tests using two level modulation: ...
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Analytical BER performance in differential n PSK coherent transmission system influenced by equalization enhanced phase noise
... speed optical transmission systems are significantly distorted by the interplay between the electronic chromatic dispersion (CD) equalization and the local oscillator (LO) laser phase noise, which leads to ...
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Blind Equalization in Optical Communications Using Independent Component Analysis
... ern coherent polarization multiplexed optical communications ...most optical communications systems relying on phase-shift keying (PSK) modulation, the most widely deployed equalizers ...
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Challenges to coherent optical communication systems and their mitigation techniques –A Review
... detection systems , modulation formats based on binary signals such as On-Off Keying (OOK) , differential BPSK or differential QPSK were dominating due to its easy generation and detection with low ...the ...
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Bit Error Rate Performance in Coherent Optical Systems
... homodyne PSK detection, ...the PSK format because the same power is transmitted during 1 and 0 ...A PSK homodyne receiver is the most sensitive receiver, requiring only 9 ...
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Digital signal processing for optical communications and networks
... receiver, coherent optical transmission was investigated extensively in the eighties of last century [23, ...of coherent communication has been delayed for nearly 20 years after that period [25, ...
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Analytical investigations on carrier phase recovery in dispersion unmanaged n PSK coherent optical communication systems
... Based on Equation (9), the performance of the one-tap normalized LMS carrier phase recovery in the coherent optical fiber communication systems using different modulation formats is shown in Figure ...
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Analytical Investigations on Carrier Phase Recovery in Dispersion-Unmanaged n-PSK Coherent Optical Communication Systems
... n-PSK coherent optical transmission systems using the one-tap normalized LMS, the block-wise average, and the Viterbi-Viterbi algorithms are investigated based on the above theoretical ...
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Digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems
... n-PSK coherent optical transmission systems has been presented in ...n-PSK optical transmission systems, the one-tap normalized LMS algorithm still shows a similar ...
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Performance Analysis of Essential Modulation Techniques
... If data-rates beyond those offered by 8-PSK are required, it is more usual to move to QAM since it achieves a greater distance between adjacent points in the I-Q plane by distributing the points more evenly. The ...
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Image Enhancement in Coherent Optical Amplification by Photorefractive Crystals
... In short, to explore the unevenness of image enhance- ment in coherent optical amplification by photorefractive crystals, a model in view of different spatial frequency in a beam has been built. It has been ...
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A 16PSK OFDM FSO Communication System under Complex Weather Conditions
... Space Optical (FSO) communication is one of the most promising access ...16PSK-OFDM optical signals under five different weather conditions (sunny, light rain, moderate rain, snow, and ...The optical ...
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PERFORMANCE COMPARISON OF DD-DPSK-OFDM AND CO-DPSK-OFDM IN ISOWC SYSTEMS
... Intersatellite optical wireless communication has high capacity systems, high speed channels, secure communication, unlicensed operations, absence of electromagnetic interferences, and long distance ...
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Optical eigenmode description of partially coherent light fields
... Scattering is one of the simplest light mater interactions possible. For spherical particles, this process can be described using the Lorenz-Mie theory, which makes use of vector spherical harmonic solutions of Maxwells ...
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Optomechanical state reconstruction and nonclassicality verification beyond the resolved-sideband regime
... This work is organised as follows. We first provide an overview of the optomechanical interaction with- out assuming resolved mechanical sidebands. We then discuss the description of this interaction over the quantum ...
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Study and Analysis of Window Synchronization in Coherent Optical OFDM
... Abstract— To analyse the errors that are involved during transmission through optical fibers using OFDM techniques. We analyze the errors that affect the long haul transmission of data with high data rate in ...
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SIMPLE AUTHENTICATION AND SECURITY LAYER INCORPORATING EXTENSIBLE AUTHENTICATION PROTOCOL MYUNG-SUN KIM. B.S., University of New Hampshire, 2005
... Both client and server sides in Figure 2-1 are symmetric; however, it is not required. For example, in the client side, database system SASL is not necessary because only the server side maintains user credential ...
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Phase noise influence in coherent optical OFDM systems with RF pilot tone : digital IFFT multiplexing and FFT demodulation
... When deriving the signal representation a procedure as in section 2.1 is followed. We consider an ideal system and neglect the influence of the guard time insertion and assume that the subcarrier recovery is perfect in ...
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