Now showing items 292-311 of 597

• #### Joint detection strategies for orthogonal frequency division multiplexing ﻿

(2000)
Traditional OFDM implementations use conventional Fourier filters for data modulation, via the IFFT operation. Much research suggests wavelet based OFDM provides performance gains, due to superior spectral containment ...
• #### Joint source/channel coding for discrete memoryless channels: Lessons to learn ﻿

(2000)
The design of optimal joint source/channel coding and decoding is examined for discrete memoryless channels with end-to-end distortion as the criterion for reliable communication. Joint source/channel encoders which map ...

(1986)
• #### L(p)-approximation by the iteratively reweighted least squares method and the design of digital FIR filters in one dimension ﻿

(1993)
In this thesis a new and simple to program approach is proposed in order to obtain an $L\sb{p}$ approximation, 2 $<$ p $<$ $\infty$, based on the Iteratively Reweighted Least Squares (IRLS) method, for designing a linear ...
• #### Lagrange rational interpolation and its applications to approximation of large-scale dynamical systems ﻿

(2013-11-06)
We present several new, efficient algorithms that extract low complexity models from frequency response measurements of large-scale dynamical systems. Our work is motivated by the fact that, in many applications, analytical ...

(1974)
• #### LASER PROCESSING OF SEMICONDUCTORS ﻿

(1982)
The great potential for advancing the state of the art in fabrication of semiconductor devices and integrated circuits with the use of laser beam processing techniques is reviewed. The unique characteristics of this novel ...
• #### Laser spectroscopic trace chemical sensors for environmental sensor networks and portable medical devices ﻿

(2008)
This thesis represents the development of the first laser spectroscopy based trace-gas sensors with sensor characteristics which simultaneously satisfy low cost, handheld footprint, low power, and long term autonomous ...
• #### Laser-assisted metalorganic chemical vapor deposition of zinc selenide ﻿

(1992)
Laser-assisted metalorganic chemical vapor deposition (LMOCVD) has been used to grow epitaxial zinc selenide at temperatures as low as 200$\sp\circ$C. The metalorganic sources, dimethylzinc (DMZ) and diethylselenide (DESe), ...
• #### Laser-assisted metalorganic chemical vapor deposition of zinc sulfide ﻿

(1997)
Laser-assisted metalorganic chemical vapor deposition (MOCVD) was used to grow crystalline zinc sulfide at temperatures as low as 200$\sp\circ$C. The metalorganic sources, dimethylzinc and diethylsulfide, were photodissociated ...
• #### Least square digital filter design in the frequency domain ﻿

(1991)
This thesis develops new methods for obtaining optimal frequency domain approximation in the design of digital filters. The approach uses a squared error approximation criterion and allows a transition band in the desired ...
• #### Lightweight Silicon-based Security: Concept, Implementations, and Protocols ﻿

(2013-09-16)
Advancement in cryptography over the past few decades has enabled a spectrum of security mechanisms and protocols for many applications. Despite the algorithmic security of classic cryptography, there are limitations in ...
• #### Limits and Capabilities of Cooperative Diversity: A Network and Protocol Perspective ﻿

(2011)
Physical-layer cooperation has been demonstrated to vastly improve wireless link reliability and end-to-end throughput by exploiting spatial diversity. Nevertheless, its performance in operational networking environments ...
• #### Limits of acoustic waveguide communication ﻿

(2006)
A new method of wireless data telemetry in oil well services uses compressional acoustic waves to transmit data along the drill string. The compressional acoustic waves are produced as coded wave trains by an acoustic ...
• #### Linkify: A Web-Based Collaborative Content Tagging System for Machine Learning Algorithms ﻿

(2014-12-03)
Automated tutoring systems that use machine learning algorithms are a relatively new development which promises to revolutionize education by providing students on a large scale with an experience that closely resembles ...
• #### Lithium niobate thin films on diamond substrates for SAW devices ﻿

(2001)
Lithium niobate thin films have been grown on diamond/silicon substrates by metallo-organic decomposition and radio frequency (R. F.) magnetron sputtering. The surface acoustic wave (SAW) characterizations of the multilayer ...
• #### Location-aided routing in intermittently connected networks ﻿

(2005)
One of the difficulties in achieving pervasive deployment of mobile ad hoc network routing protocols is their strong assumption regarding node connectivity. Many realistic networking scenarios fail to meet this assumption, ...
• #### Location-oriented sampling ﻿

(2007)
In this work we present a sampling scheme that uses feature-location information to compactly represent the data. Traditional Nyquist sampling leverages compact frequency support to form the representation, but it ignores ...
• #### Loss inference in unicast network tomography based on TCP traffic monitoring ﻿

(2001)
Network tomography is a promising technique for characterizing the internal behavior of large-scale networks based solely on end-to-end measurements. Despite the efficiency of active probing in most network loss tomography ...

(1966)