Now showing items 74-93 of 407

• #### Bounds and protocols for a two-way multiple node channel ﻿

(2007)
Often in multiuser wireless systems like cellular networks, data is present in both directions (uplink and downlink). One way to formulate protocols for such networks, is to design the uplink and downlink independently. ...
• #### Bounds for optimal compressed sensing matrices and practical reconstruction schemes ﻿

(2008)
Compressed Sensing (CS) is an emerging field that enables reconstruction of a sparse signal x &isin; Rn that has only k &lt;&lt; n non-zero coefficients from a small number m &lt;&lt; n of linear projections. The ...
• #### Buckminsterfullerene purification and buckminsterfullerene film characterization ﻿

(1994)
A method is described which utilizes the difference in vapor pressure between C$\sb{60}$ and heavier fullerenes to produce C$\sb{60}$ powder with a purity of 99.97%. Using the material from this process allows for the ...
• #### Bursting, beating, and chaotic modes in mathematical models of the R15 cell in Aplysia ﻿

(1989)
Chaotic regimes have been observed experimentally in neurons as well as in deterministic neuronal models. The bursting R15 cell in the abdominal ganglion of Aplysia has been the subject of extensive mathematical modeling. ...
• #### Cache management in scalable network servers ﻿

(2000)
For many users, the perceived speed of computing is increasingly dependent on the performance of network server systems, underscoring the need for high performance servers. Cost-effective scalable network servers can be ...
• #### Capacity of low power multiuser systems with antenna arrays ﻿

(2005)
In this thesis, we study wireless multiuser communication systems in the regime of low spectral efficiencies, where users and the multiple access point are equipped with antenna arrays. Our first contribution is to develop ...
• #### Channel equalization algorithms for MIMO downlink and ASIP architectures ﻿

(2004)
Processors for mobile handsets in 3G cellular systems require: high speed, flexibility and low power dissipation. While computationally efficient, ASIC processors are often not flexible enough to support necessary variations ...
• #### Channel estimation for code division multiple access communication systems ﻿

(1994)
We consider the estimation of channel parameters for code division multiple access (CDMA) communication systems operating over channels with either single or multiple propagation paths. We present two approaches for ...
• #### Characterization of block memory operations ﻿

(2006)
Block memory operations are frequently performed by the operating system and consume an increasing fraction of kernel execution time. These operations include memory copies, page zeroing, interprocess communication, and ...
• #### Code design and multiuser detection for code division multiple access systems with continuous phase modulation ﻿

(1996)
The proliferation of wireless communications services combined with the limited spectrum availability have placed the bandwidth utilization as a major performance measure. Consequently, the bandwidth allocation technique ...
• #### Code design for multiple-antenna systems ﻿

(2001)
We propose a systematic method for the design of space-time codes for AWGN slowly and fast Rayleigh fading channels. This can be accomplished by adopting a concatenated space-time code structure, where an orthogonal transmit ...
• #### Code design for the relay channel ﻿

(2007)
The design of wireless communication networks is based on the premise that networks are collections of reliable point-to-point links between communicating nodes. Such a communication model, although simple, is inefficient ...

(2001)
A fixed bandwidth expansion can be achieved either by coding or spreading, while each have different effect on the resultant signal space. Coding increases both Shannon and Fourier bandwidth whereas spreading only increases ...
• #### Coherent multiscale image processing using quaternion wavelets ﻿

(2006)
This thesis develops a quaternion wavelet transform (QWT) as a new multiscale analysis tool for geometric image features. The QWT is a near shift-invariant tight frame representation whose coefficients sport a magnitude ...
• #### Component-based adaptation for mobile computing ﻿

(2002)
Component-based adaptation is a novel approach for adapting applications to the limited availability of resources such as bandwidth and power in mobile environments. Component-based adaptation works by calling on the ...
• #### Compressive sensing for signal ensembles ﻿

(2010)
Compressive sensing (CS) is a new approach to simultaneous sensing and compression that enables a potentially large reduction in the sampling and computation costs for acquisition of signals having a sparse or compressible ...

(1967)
• #### CONDUCTIVITY STUDIES IN IRON-DOPED LITHIUM-NIOBATE BY PHASE HOLOGRAPHY ﻿

(1981)
By the use of holographic storage techniques, the conductivity of iron doped lithium niobate has been investigated. The results indicate that the conductivity of the material immediately after hologram formation is much ...
• #### Connexions: An architecture for Web-based educational materials ﻿

(2001)
This thesis describes Connexions, a powerful new architecture for managing web-based educational materials. Connexions, consisting of five components, enables course instructors to take advantage of the cross-linked nature ...

(1974)