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Digital Signal Processing For Short - Reach Optical Communications - Future Direction For Phd Research Scholar - Phdassi

Short-reach optical communication has emerged as an key business segment and research field in recent years, fueled mostly by Cloud Service and data-center applications. Short-reach systems are distinguished by direct detection-based receiver configurations and other low-cost, small-form-factor components that cause transmission defects not observed in coherent systems.<br><br>Learn More: https://bit.ly/3gAlfqw<br>

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Digital Signal Processing For Short - Reach Optical Communications - Future Direction For Phd Research Scholar - Phdassi

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  1. DIGITALSIGNALPROCESSING FOR SHORT-REACH OPTICAL COMMUNICATIONS–FUTURE DIRECTION FOR PHD RESEARCHSCHOLAR AnAcademicpresentationby Dr.NancyAgnes,Head,TechnicalOperations,Phdassistance Group www.phdassistance.com Email:info@phdassistance.com

  2. TODAY'SDISCUSSION Outline In-brief Introduction Channelmodelanddspforlong-haulvsshort-reachsystems Conclusion

  3. IN-BRIEF Short-reach optical communication has emerged as an key business segment and researchfield in recent years,fueledmostlybyCloudServiceanddata- centerapplications. Short-reach systems are distinguished by detection-based receiver configurations and direct other low-cost,small-form-factorcomponentsthatcause transmissiondefectsnotobservedincoherent systems. Contd...

  4. Innovativesignallinganddigitalsignalprocessing (DSP)arecriticaltoallowingthesecomponents to reach their full potential and meet data rate needswhilebeingcost-effective.

  5. INTRODUCTION Traditionalfiber-opticcommunications[1]concentratedon high-speedconnectionsoverlongdistancesaroundthe world. NewusagesincludingtheInternetofThings(IoT), Augmented/Virtual Reality, Cloud Computing, storage, and othersoftware-as-a-service(SaaS)andInfrastructure-as-a- Service (IaaS) have increased demand for short-reach networksindatacentres(DCs) inrecentyears. Contd...

  6. AccordingtoarecentCiscoresearch,by2020,86percentof worldwide Internet traffic would be DC linked, with 77 percent of that trafficoccurring within aDC [2]. Content providers like Facebook, Google, Amazon, and others are drivingsuch rapidgrowth in DCtraffic. They have invested extensively in their own infrastructure in recent years and have replaced traditional telecommunication carriers as market drivers for optical transceivers, particularly for short-range connectivity Contd...

  7. Digitalcoherentsystems,inwhichalldegreesoffreedomoftheopticalcarrier (amplitude, phase, and polarisation) are used to encode information, are possibly the mostsignificantinnovationinopticaltransceivertechnologiesoverthelastdecade. In both polarizations, receiver digital signal processing (DSP) retrieves the whole field information. Transmission flaws such as chromatic dispersion (CD) and polarization-mode dispersion (PMD)become linearand maybe simplyand adaptivelyrectified [3]. Contd...

  8. In current year, the research community has worked hardtodesignDSPsolutionsforshort-reach systems that are comparable to long-haul systems' results. But, due to the minimal size of the market for short- rangetransceivers,costistheprimaryconcern, preventing direct application of the digital coherent systemideato short-rangelinks. Contd...

  9. Transceiver form factors are also critical because port density, or the total number of physical connections and bit rate per area, is a crucial element in determining the overallsize and energyconsumption of DC. These limits place unprecedented demands on physical layer devices, necessitating novel signalling, sensing, and DSP methodologies to accomplish next-generation DC forthe aforementioned applications. Contd...

  10. CHANNEL MODEL AND DSP FOR LONG-HAUL VS SHORT-REACHSYSTEMS The current generation of DSP research for short- reachnetworks is built on developments in long-haul digitalcoherentsystemsoverthelastdecade. An overview of coherence detection and DSP for long-haul systems is presented here, followed by a discussionofrestrictionsuniquetoshort-reach systemsthatleadstonewDSPresearchdirections. Contd...

  11. Source:Xu,T.(2017).

  12. CANONICAL DIGITAL COHERENT SYSTEMS FOR LONG-HAULOPTICALCOMMUNICATIONS Coherentdetectiondevelopedoneofthemost important technologies in the creation of high-speed, high-spectral-efficiency,dynamicallyreconfigurable opticalnetworksforlong-distancetransmission. A coherent receiver allows information symbols to be encoded in all degrees of freedom available in a fibre by recovering the electric field in the two fibre polarizations,resultinginenhancedpowerand spectralefficiency. Contd...

  13. Digital compensation can be done either before up-conversion onto an optical carrier or after the optical signal has been down-converted to the electronicdomain at thereceiver. Inbothcircumstances,ifthebasebandsignalintheelectronicdomain is sampled above the Nyquist rate, the digitised signal has all of the information of the analogue electric field, allowing DSP compensation to executewithoutlossofperformancewhencomparedtoanalogue impairmentcompensationineithertheopticalorelectronicdomain. Contd...

  14. UNIQUECHALLENGESFORSHORT-REACHSYSTEMS The unique challenges that stimulate new DSP approaches for short- reachdevices are multi-fold. Cost:High-performancedevicesforthemarketoflow-costshort- reachtransceivers. Furthermore,directdetectionispreferabletocoherentdetection. BecauseofthelackofTECandwavelengthlockingdevices, simplified DSP is highly sought, and channel spacing is substantially biggerthantypical50GHzinternationaltelecommunicationunion (ITU)grids. Contd...

  15. Form factor:Whilesmallform factorsaredesirableforall typesofoptical transceivers,theyarecriticalforDCapplicationsbecausethey affectport density,racksize,which directlytranslatestotheoverallsizeof DCs, the amountofcooling/air conditioningrequired,and hence total energy consumption. Latency:Becauseofsupercomputingand otherdelay-sensitiveCloud applications,DCsystemshavehigherlatencytolerancethanlong-haulsystems. Inaddition,propagationdelaysaresubstantiallylessinshort-reachsystems thaninlong-haulnetworks,and thereare fewer connection components to causeadditionalsignaldelays. Contd...

  16. DIFFERENTTYPESOFSHORT-REACHSYSTEMSANDTHEIRRESPECTIVECHALLENGESDIFFERENTTYPESOFSHORT-REACHSYSTEMSANDTHEIRRESPECTIVECHALLENGES

  17. DIFFERENTTYPESOFSHORT-REACHSYSTEMSANDTHEIRRESPECTIVECHALLENGESDIFFERENTTYPESOFSHORT-REACHSYSTEMSANDTHEIRRESPECTIVECHALLENGES

  18. In this blog stated the various DSP techniques that enable high capacity transmissions for short-reach systems. Advanced modulation formats and direct detection aretypicallyusedduetocost constraints. CONCLUSION DSP techniques are essential to limitations, overcome impairments component bandwidth introducedbynonlinearmodulationcharacteristicsin thetransmission channel. Contd...

  19. Future efforts on joint optimization of optical components and DSP techniquesmay becomea key areaof growth. This may also enable gradual introduction of many coherent detection functionalitiesintofutureshort-reachopticalcommunicationsystems.

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