Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 32 for “"time division multiplexing"”.
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Optical packet networking using optical time division multiplexing.
… networking has concentrated on wavelength-division multiplexing (WDM). Optical time-division multiplexing (OTDM), which offers advantages over WDM networks, is considered as an alternative to WDM for future networks proving a single stream data rates of 100 Gb/s using a single wavelength. …
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Performance analysis of star architecture packet-switched VSAT networks using random code division multiple access
… major thrusts. First, we analyzed the average time delay of the broadcast Time Division Multiplexing (TDM) outbound channel (hub to VSAT). Second, a throughput performance analysis of an asynchronous Direct-Sequence Code Division Multiple Access (DS-CDMA) communication system is carried out for …
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Delay improvements from multiple wavelengths in an optical folded bus
… the LAN and analyzed the system's delay for both time division multiplexing and a reservations. The multiple wavelength system is assumed to have a very limited number of wavelengths and therefore does not apply a typical wavelength division multiplexing. The analysis of the delay involves mostly …
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Optimizing resource allocation in next-generation optical access networks
… three next-generation access networks: Time Division Multiplexing (TDM) PONs, Wavelength Division Multiplexing (WDM) PONs, and WDM Radio-Over-Fiber (RoF) Picocellular networks. To address resource allocation problems in these three networks, this thesis first investigates respective …
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ΑΝΑΛΥΣΗ ΚΑΙ ΣΧΕΔΙΑΣΗ ΤΟΥ ΜΗΧΑΝΙΣΜΟΥ ΠΡΟΣΠΕΛΑΣΗΣ ΓΙΑ ΕΝΑ ΟΠΤΙΚΟ ΔΙΚΤΥΟ ΠΟΛΛΑΠΛΩΝΥΠΗΡΕΣΙΩΝ ΣΤΑ 144 ΜΒ/S
… CONJUNCTION WITH A CONSIDERABLE AMOUNT OF REAL-TIME AND INTERACTIVE DATA TRAFFIC REQUIRES DIFFERENT HANDLING OF STREAM AND BURSTY-TYPE COMMUNICATIONS. THIS TASK IS ACCOMPLISHED THROUGH THE USE OF A DISTRIBUTED HYBRID SWITCHING PROTOCOL WHICH EMPLOYS AN ASYNCHRONOUS DYNAMIC TIME DIVISION …
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Optical Temperature Monitoring of Electrical Power Transformer Networks
… accuracy that can be achieved is about 0.010C. Time Division Multiplexing (TDM) is employed to identify individual transformers in the network at the central station. A Model to find an optimal node to place the optical sources is also presented. The temperature monitoring of standard IEEE …
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A new compound modulation technique for multi-channel analog video transmission on fiber
… frequency modulation/pulse amplitude modulation/time division multiplexing (FM/TDM) is described and compared with present digital and analog systems. Parameters for the proposed system are selected and the relationship between the performance and parameter values is discussed. Analysis and …
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Novel all-optical switching and processing techniques for optical networking
… thesis, the possibility of processing optical time-division multiplexing (OTDM) signals in both the temporal and spectral domains is investigated. The technique relies on the conversion of high-speed OTDM signals into a mixed time and wavelength division multiplexing (TDM-WDM) format. Depending …
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Deterministic SpaceWire Networks
… over existing equipment. It does this by using time-division multiplexing, controlled by the sequential broadcasting of time-codes by a network manager. A virtual bus abstraction is then used to divide the network architecture into segments in which all traffic is controlled by a single Remote …
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Resonant cavity Fibre Bragg grating sensor interrogation
… presents a novel high-performance approach to time-division-multiplexing (TDM) fibre Bragg grating (FBG) optical sensors, known as the resonant cavity architecture. A background theory of FBG optical sensing includes several techniques for multiplexing sensors. The limitations of current …
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Performance analysis of star architecture packet-switched VSAT network using roll-call polling multiple access scheme
… that carries out its communications task on a Time Division Multiplexing (TDM) satellite channel. This research consists of three major parts. First, the performance analysis of the single-hop star architecture network is carried out. This includes the study of a polling communication system …
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The impact of WH/TS codes in implementing incoherent OCDMA system
… hardware requirements is needed. Optical code division multiple access (OCDMA) is an advanced multiplexing scheme which provides a more efficient and fairer division of available bandwidth among users in comparison to other techniques such as wavelength division multiplexing (WDM) and optical …
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Analysis and practical considerations in implementing multiple transmitters and receivers for wireless power transfer via coupled magnetic resonance
… The second part of this study introduces a time division multiplexing (TDM) technique for tightly coupled receivers via the same method of coupled magnetic resonance. Two or more receivers can be powered simultaneously using a single transmit coil. In a tightly coupled receiver scenario, the …
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A Quasi-distributed Sensing Network Based on Wavelength-Scanning Time-division Multiplexed Fiber Bragg Gratings
… electromagnetic immunity, and excellent multiplexing capability. Several FBG multiplexing techniques have been developed to increase the multiplexing number and further reduce the unit cost. To the author's best knowledge, the current demonstrated maximum multiplexing number are 800 FBG …
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Multi slot amplitude coding technique for high speed optical fiber communication system
… speed and high capacity transmission system are multiplexing technique such as electrical time division multiplexing (ETDM) and duty cycle division multiplexing (DCDM). Unfortunately, ETDM bit rate is limited by the speed of electronic devices and DCDM suffers from increased spectral width when …
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Electrical Impedance Tomography/Spectroscopy (EITS): a Code Division Multiplexed (CDM) approach
… and successfully confirmed the use of Code Division Multiplexing (CDM) using Gold codes in Electrical Impedance Tomography and Spectroscopy. The results obtained showed 3.5% and 6.2% errors in determining the position and size of imaged anomalies respectively, with attainable imaging speed …
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Hybrid Silicon Mode-Locked Laser with Improved RF Power by Impedance Matching
… optical fiber communications based on optical time-division multiplexing (OTDM) systems. Integrating mode-locked lasers on silicon makes way for highly integrated silicon based photonic communication devices. The mode-locked laser being used in this thesis was built with Hybrid Silicon …
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Microwave techniques and applications for semiconductor quantum dot mode-locked lasers
… level as well as high bit-rate optical time division multiplexing (OTDM), diverse waveform generation, and microwave signal generation. However, there are still several challenges to conquer for engineering applications. Semiconductor MLLs sources have generally not been able to match …
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Noise and crosstalk analysis of all-optical time division demultiplexers.
… restricts the data capacity of long-haul optical time division multiplexing (OTDM) systems. It is desirable to demultiplex the OTDM signal in optical domain, thereby lifting the bandwidth limitation of the electrical demultiplexer. The general principle of all-optical time division demultiplexing …
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Quality of service for high-speed interconnection networks onboard spacecraft
… provide guarantees in terms of reliability and timely delivery to data generated by network clients. Quality of Service is increasingly being deployed in commercial ground technologies and its availability for space applications, which requires high reliability and performance, is of high …
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