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.
Results
Showing 1 to 17 of 17 for “"clock recovery"”.
-
A delay-locked loop for clock recovery and data synchronization
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1990.
-
A noise-gated PLL for clock recovery in a free-space laser communication system
… I developed a phase-locked loop system for data clock recovery in a free-space laser communication application. The clock recovery unit is designed to operate at extremely low optical received power, tolerate a fading channel, and also account for Doppler effects. I explored the feasibility of …
-
All-optical clock recovery using a mode-locked fiber figure-eight laser with a semiconductor nonlinearity
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
-
CMOS Receiver Design for Optical Communications over the Data-Rate of 20 Gb/s
… is presented, and a new architecture for clock recovery is proposed for 50% higher clock rate. The TIA is based on a gm-boosted common-gate amplifier. The input-resistance is reduced by modifying a transistor at input stage to be diode-connected, and therefore lowers R-C time constant at …
-
The design and implementation of a new wide-range frequency detector
… a wide range frequency detector for use in clock recovery and data retiming applications. The new detector works in conjunction with the existing "mid-range" frequency detector to accurately lock the VCO to the incoming data rate. The new detector consists of two halves: one to detect when …
-
All-semiconductor High Power Mode-locked Laser System
… Dynamics of all-optical timing synchronization (clock recovery) using multi-section gain-coupled distributed-feedback (MS-GC DFB) lasers are discussed. A record speed of 180-GHz timing synchronization has been demonstrated using this device. An all-optical carrier synchronization (phase and …
-
Scalable fault tolerance for high-performance streaming dataflow
… systems either come with long downtimes during recovery, or fail to scale to large deployments due to the overhead of global coordination. For example, in the failure of a single dataflow node, existing lineage-based techniques take a long time to recompute all lost and downstream state, while …
-
The impact of WH/TS codes in implementing incoherent OCDMA system
… A receiver that incorporates an all-optical clock recovery (AOCR) for synchronisation in incoherent OCDMA systems was developed and demonstrated. The all-optically recovered clock signal was then used to drive optical "time gate" to control a switching window ("a time gate"). This is to pass …
-
Multi- Gigabit Patch Antenna Wireless Links: An Experimental Investigation.
… A phase locked loop based carrier and clock recovery circuit was implemented to enable autonomous demodulation and data analysis over the target distance of 60 metres. The complete system was then evaluated in terms of data throughput. By combining the bandwidth capability of each …
-
Fractionally spaced equalization for high-speed links
… links enter the multi-Gb/s era, equalization and clock recovery designs become much more challenging. For conventional links, these two loops are separate with different performance metrics, resulting in sub-optimal performance. Fractionally spaced equalization (FSE) inherently unifies these two …
-
Radio frequency and terahertz signals generated by passively mode-locked semiconductor lasers
… such as radio-over-fibre, or all-optical clock extraction. Terahertz signals are the focus of many research bodies nowadays, due to their interaction with matter. They have potential applications in areas like: industry, pharmacy, security (military), telecommunication and medicine. With …
-
All optical networking beyond 10 Gbits/s OTDM networks based on electro-optic modulators and fibre ring lasers
… including favoured techniques for high speed clock recovery. Theoretical treatments of the performance of Mach Zehnder and electroabsorption modulators support the design criteria that are established for the construction of simple optical time division multiplexed systems. Having established …
-
Design of a phase locked loop based clocking circuit for high speed serial link applications
… over the same old ''lossy'' channels, the clock-frequencies need to scale accordingly and clever I/O links need to be developed. The most crucial component of any high-speed I/O link is the clocking circuitry: clock generator at the transmit (TX) end and clock-recovery unit on the receive …
-
Exploiting quasiperiodic electromagnetic radiation using software-defined radio
… targets by fitting likely harmonics of emanating clock signals to a model. Video signals contain blanking intervals that create characteristic periodicities; cepstral features can be used to eliminate false positives, and provide improved performance over autocorrelation as a method of recovering …
-
System-Aware Design of Energy-Efficient High-Speed I/O Links
… consist of a transmit driver, PLL, equalizer, clock recovery unit and comparator, primarily implemented with mixed-signal components, to achieve the desired BER without forward error correction (FEC). More recently, analog-to-digital converter (ADC) based receivers have gained acceptance owing …
-
Analysis of Photonic Structures for Optical Networks
… Additionally, a theoretical study for optical clock recovery using the Optical Programmable Logic Cell (OPLC) has been proposed. Finally, all optical 2R-regeneration based on the integration of semiconductor optical amplifiers and electroabsorbers in a single waveguide is experimentally …