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Capacity provisioning, failure recovery and throughput analysis for low earth orbit satellite constellations
(Massachusetts Institute of Technology, 2002)
We investigate the capacity needed to build a restorable satellite network and design routing schemes to achieve high throughput. Specifically, the first part of this thesis considers the link capacity requirement for a ...
Distributed coordination in network information theory
(Massachusetts Institute of Technology, 2001)
Constructing a large-scale wireless data network is spectacularly expensive. It is therefore important to understand how to efficiently utilize the physical infrastructure and available battery power, which are expensive ...
Information theoretic analysis of watermarking systems
(Massachusetts Institute of Technology, 2001)
Watermarking models a copyright protection mechanism where an original data sequence is modified before distribution to the public in order to embed some extra information. The embedding should be transparent (i.e., the ...
Quantum signal processing
(Massachusetts Institute of Technology, 2002)
Quantum signal processing (QSP) as formulated in this thesis, borrows from the formalism and principles of quantum mechanics and some of its interesting axioms and constraints, leading to a novel paradigm for signal ...
Modeling the effects of systematic process variation of circuit performance
(Massachusetts Institute of Technology, 2001)
High-speed modulation of resonant CMOS photonic modulators in deep-submicron bulk-CMOS
(Massachusetts Institute of Technology, 2009)
Processor manufacturers have turned to parallelism to continue to improve processor performance, and the bandwidth demands of these systems have risen. Silicon photonics can lower the energy-per-bit of core-to-core and ...
Faster generation of random spanning trees
(Massachusetts Institute of Technology, 2009)
In this thesis, we set forth a new algorithm for generating approximately uniformly random spanning trees in undirected graphs. We show how to sample from a distribution that is within a multiplicative (1+6) of uniform in ...
An optical data receiver for integrated photonic interconnects
(Massachusetts Institute of Technology, 2009)
The throughput bounds of traditional interconnect networks in microprocessors are being pushed to their limits. In past single-core processors, the number of long global wires constituted only a small fraction of the total. ...
An electromechanical valve drive incorporating a nonlinear mechanical transformer
(Massachusetts Institute of Technology, 2003)
In traditional internal combustion engines, a camshaft acts on the valve stems to open and close the valves. Valve timing is fixed relative to piston position. On the other hand, if a valve is flexibly controlled by a ...
Organic photovoltaics and concentrators
(Massachusetts Institute of Technology, 2008)
The separation of light harvesting and charge generation offers several advantages in the design of organic photovoltaics and organic solar concentrators for the ultimate end goal of achieving a lower cost solar electric ...