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Development of terahertz quantum-cascade lasers
(Massachusetts Institute of Technology, 2007)
The terahertz or the far-infrared frequency range of the electromagnetic spectrum ( ... ) has historically been technologically underdeveloped despite having many potential applications, primarily due to lack of suitable ...
Automating the construction of a complier heuristics using machine learning
(Massachusetts Institute of Technology, 2006)
Compiler writers are expected to create effective and inexpensive solutions to NP-hard problems such as instruction scheduling and register allocation. To make matters worse, separate optimization phases have strong ...
Long-term robot mapping in dynamic environments
(Massachusetts Institute of Technology, 2011)
One of the central goals in mobile robotics is to develop a mobile robot that can construct a map of an initially unknown dynamic environment. This is often referred to as the Simultaneous Localization and Mapping (SLAM) ...
Performance evaluation and optimization models for processing networks with queue-dependent production quantities
(Massachusetts Institute of Technology, 2000)
Capacity of Gaussian noise channels with side information and feedback
(Massachusetts Institute of Technology, 2001)
In wireless communication systems, the communication channel is often modeled as a fading multiaccess channel with time-varying multipath. Because of the mobility of the users and the varying number of users, the transmission ...
Conversational scene analysis
(Massachusetts Institute of Technology, 2002)
In this thesis, we develop computational tools for analyzing conversations based on nonverbal auditory cues. We develop a notion of conversations as being made up of a variety of scenes: in each scene, either one speaker ...
Cooperative diversity in wireless networks : algorithms and architectures
(Massachusetts Institute of Technology, 2002)
To effectively combat multipath fading across multiple protocol layers in wireless networks, this dissertation develops energy-efficient algorithms that employ certain kinds of cooperation among terminals, and illustrates ...
Information theoretic aspects of the control and the mode estimation of stochastic systems
(Massachusetts Institute of Technology, 2004)
(cont.) parallel with a communication paradigm and deriving an analysis of performance. In our approach, the switching system is viewed as an encoder of the mode, which is interpreted as the message, while a probing signal ...
Generalized frequency modulation
(Massachusetts Institute of Technology, 2001)
In frequency modulation (FM) systems, a continuous-time information signal is modulated onto a sinusoidal carrier wave by using the information signal to modulate the frequency of the carrier wave. In this thesis, a more ...
Exploring scatterer anisotrophy in synthetic aperture radar via sub-aperture analysis
(Massachusetts Institute of Technology, 2001)
Scattering from man-made objects in SAR imagery exhibits aspect and frequency dependencies which are not always well modeled by standard SAR imaging techniques based on the ideal point scattering model. This is particularly ...