Now showing items 311-330 of 2796

• Blind Crosstalk Cancellation for DMT Systems ﻿

(2002-09-01)
As the deployment of broadband communication systems such as DSL continues to grow, system performance in terms of capacity and error rates is severely limited by crosstalk interference. In order to continue deploying high ...
• Blind PARAFAC Receivers for Multiple Access-Multiple Antenna Systems ﻿

(2003-10-01)
In this paper, we present a new blind receiver for multiple access channel with multiple transmit antennas per user and multiple receive antennas (MIMO channel). After being multiplied by a spreading sequence, each user s ...
• Blind Quadratic and Time Frequency Based Detectors from Training Data ﻿

(1995-01-20)
Time-frequency based methods, particularly quadratic (Cohen's-class) representations, are often considered for detection in applications ranging from sonar to machine monitoring. We propose a method of obtaining near-optimal ...

(1968)

(2013)
• BMS-CnC: Bounded Memory Scheduling of Dynamic Task Graphs ﻿

(2013-10-24)
It is now widely recognized that increased levels of parallelism is a necessary condition for improved application performance on multicore computers. However, as the number of cores increases, the memory-per-core ratio ...
• Boosting forward-time population genetic simulators through genotype compression ﻿

(2013)
Background: Forward-time population genetic simulations play a central role in deriving and testing evolutionary hypotheses. Such simulations may be data-intensive, depending on the settings to the various param- eters ...
• Bottleneck Characterization of Dynamic Web Site Benchmarks ﻿

(2002-02)
The absence of benchmarks for Web sites with dynamic content hasbeen a major impediment to research in this area. We describe three benchmarks for evaluating the performance of Web sites with dynamic content. The benchmarks ...
• 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 ...
• Bounds on Achievable Rates for General Multi-terminal Networks with Practical Constraints ﻿

(2003-04-20)
We consider the problem of communication in a general multi-terminal network where each node of the network is a potential sender or receiver (or both) but it cannot do both functions together. The motivation for this ...
• Breaking of Symmetry in Graphene Growth on Metal Substrates ﻿

(2015)
In graphene growth, island symmetry can become lower than the intrinsic symmetries of both graphene and the substrate. First-principles calculations and Monte Carlo modeling explain the shapes observed in our experiments ...
• Bridging the Programming Gap between Persistent and Volatile Memory using WrAP ﻿

(2013-05)
Advances in memory technology are promising the availability of byte-addressable persistent memory as an integral component of future computing platforms. This change has significant implications for software that has ...
• Broadband Absorption Engineering to Enhance Light Absorption in Monolayer MoS2 ﻿

(2016)
Here we take a first step toward tackling the challenge of incomplete optical absorption in monolayers of transition metal dichalcogenides for conversion of photon energy, including solar, into other forms of energy. We ...
• Broadband, Polarization-Sensitive Photodetector Based on Optically-Thick Films of Macroscopically Long, Dense, and Aligned Carbon Nanotubes ﻿

(2013)
Increasing performance demands on photodetectors and solar cells require the development of entirely new materials and technological approaches.Wereport on the fabrication and optoelectronic characterization of a photodetector ...
• Broadcast Detection Structures with Applications to Sensor Networks ﻿

(2006-03-01)
Data broadcasting is potentially an effective and efficient way to share information in wireless sensor networks. Broadcasts offer energy savings over multiple, directed transmissions, and they provide a vehicle to exploit ...

(2001-08-20)
In this paper, we study transmission techniques for broadcast channels with a single transmitter and multiple receivers. The transmitter is assumed to be equipped with multiple antennas. Further, each receiver is interested ...
• 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 ...
• Building a Control-flow Graph from Scheduled Assembly Code ﻿

(2002-02-01)
A variety of applications have arisen where it is worthwhile to apply code optimizations directly to the machine code (or assembly code) produced by a compiler. These include link-time whole-program analysis and optimization, ...
• Building a map for robot path planning by fusing video images and laser rangefinder data ﻿

(1993)
This thesis describes algorithms that fuse the data from a single video camera and a laser rangefinder. By merging information from these sensors, the algorithms build a digital map of the local environment for a robot to ...