coherent optical detection systems
Challenges to coherent optical communication systems and their mitigation techniques –A Review
... Abstract: Optical communication systems often arise as the most efficient solution to transmit at high data rates and also over long ...in optical communication are focusing on spectrally efficient ...
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Advanced DSP for coherent optical fiber communication
... and systems have started to use artificial intelligence (AI) technologies to improve the performance, from equipment to control and ...point-to-point optical communication systems is crucial for ...
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Digital signal processing for optical communications and networks
... with coherent detection shows a very promising solution for long-haul high-capacity optical communication systems, which offers a great flexibility in the design, deployment, and operation of ...
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Carrier phase estimation in dispersion unmanaged optical transmission systems
... high-capacity optical fibre networks can be seriously deteriorated by physical impairments in the transmission systems, ...of coherent optical detection, advanced modulation formats and ...
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Phase noise influence in optical OFDM systems employing RF pilot tone for phase noise cancellation
... Direct Detection and Coherent (heterodyne) detection is considered for OFDM imple- mentations (DD-OFDM and CO-OFDM systems) and the low channel baud-rate leads to a significant influ- ence of ...
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Multi-level Mapping for Long Haul Coherent Optical OFDM Systems
... per optical wavelength channel ...of coherent detection, orthogonal frequency division multiplexing (OFDM) technique, multi-level mapping, multiplexing of polarization modes of guided optical ...
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Phase noise influence in long range coherent optical OFDM systems with delay detection, IFFT multiplexing and FFT demodulation
... nQAM systems with DSP based disper- sion compensation leads to strong influence of laser phase noise which is further enhanced by equalization enhanced phase noise (EEPN) originating from the local oscillator ...
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Machine learning for fiber nonlinearity mitigation in long haul coherent optical transmission systems
... symbol detection at Rx side, but do not necessarily have an advantage over physics-based DSP ...the optical impairment ...to optical communications will become more and more significant with the ...
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Distributed optical fibre sensors based on the coherent detection of spontaneous Brillouin scattering
... distributed optical sensors is that any optical fibre can serve as the amplifying medium; in essence, the sensing fibre itself becomes the amplifier medium and hence the gain is distributed over the length ...
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Analytical Investigations on Carrier Phase Recovery in Dispersion-Unmanaged n-PSK Coherent Optical Communication Systems
... Using coherent optical detection and digital signal processing, laser phase noise and equalization enhanced phase noise can be effectively mitigated using the feed-forward and feed-back carrier phase ...
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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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Digital adaptive carrier phase estimation in multi level phase shift keying coherent optical communication systems
... over optical fibers, to constitute the great part of the national and international communication infrastructures ...speed optical fiber communication systems can be significantly degraded by the ...
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Analytical investigations on carrier phase recovery in dispersion unmanaged n PSK coherent optical communication systems
... Using coherent optical detection and digital signal processing, the powerful equalization and effective mitigation of the communication system impairments can be implemented in the electrical domain ...
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Bit Error Rate Performance in Coherent Optical Systems
... The receiver sensitivity at a BER of 10 −9 can be obtained by using Q = 6 and Eq. (14) for SNR. For the purpose of comparison, it is useful to express the receiver sensitivity in terms of the number of photons Np. It is ...
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Receiver implemented RF pilot tone phase noise mitigation in coherent optical nPSK and nQAM systems
... the coherent Rx is ...(ideal) optical RF pilot tone, the use of an Rx generated RF pilot tone simplifies the design of the optical part of the transmission system and allows straightforward and ...
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Cognitive Radio Network based on Energy Spotting Method with Enhanced Sensing Accuracy
... the detection accuracy that can lead to decrease the error ...the detection to increase the accuracy, in proposed method it is conventionally proved that the suggested scheme of detection mechanism ...
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Novel Compact Waveguide Optical Chemical Sensor for Control of Gaseous Ammonia Concentration
... absorption region is in the range of 549-653 nm [3, 6]. At the same time, particular features of operating various integrated optical sensors in the visible range have been investigated insufficiently, too. ...
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Optical phase synchronization in coherent optical beamformers for phased array receive antennas
... In this master thesis, we will focus on an implementation of the OBFN for the SMART project. The SMART project [2] is part of the Eureka Iniciative for Packaging & Integration of microDevices and Smart Systems ...
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A HYBRID ANT COLONY SYSTEM FOR GREEN CAPACITATED VEHICLE ROUTING PROBLEM IN SUSTAINBALE TRANSPORT
... time, which makes it difficult to design reliable systems with guaranteed performance [19]. The fundamental phenomenon which makes reliable wireless communication difficult is time varying multipath fading. It may ...
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A comparison of 3 optical systems for the detection of broadband ultrasound
... An important consideration in choosing an FBG for ultrasound detection is the gauge length of the device, which should be no more than a fifth of the ultrasound wavelength. This is because if the FBG is long ...
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