The high field transport properties of polyethylene investigated by the electrostatic mirror technique

  • Acroute D.
  • Bigarre J.
  • Coelho R.

In the electrostatic mirror technique promoted by Le Gressus, an insulating sample is charged locally by a focused high energy beam from a SEM, then a low energy beam analyses the charged area. Scattered by the trapped charge, this probing beam is deviated back to the SEM chamber, so that ...

Experiencing Megaco protocol for controlling non-decomposable VoIP gateways

  • Anquetil L.
  • Conte A.
  • Levy T.

VoIP gateways are devices that take care of interworking the new emerging VoIP networks with the existing legacy telecommunication networks. The efficient control of such gateways is a key prerequisite for a successful deployment of VoIP. Currently solutions are based on protocols like Megaco/H.248 and SCTP, designed for controlling logical ...

Architectures for multistage crossconnects

  • Richards G.

Numerous issues are involved in the design of a multistage crossconnect. Many of these are concerned with technology and performance. We suggest that network control is a worthy addition to the list of design considerations

A Novel Test Structure for Sub-micron CMOS Leakage Characterisation and Modelling

  • Gillon R.
  • Hoste S.
  • Raes P.
  • Tack M.
  • Vanderbauwhede W.
  • Zhenqiu Ning

Power consumption and generation in the electronics industry. A perspective

  • Azar K.

With the proliferation of electronics into every aspect of our life, the world is rapidly speeding towards the silicon-based one. This is evident from the heavy reliance on electronics around the world which can be measured by the Internet use (doubling every 100 days), number of PCs (110 million sold ...

IEEE 802.11 system design

  • Prasad N.

The present generation of the wireless LAN (WLAN) products are implemented on Personal Computer Memory Card International Association (PCMCIA) cards (also called PC card) that are used in laptops, computers and portable devices. The technical issues for WLAN systems are size, power consumption, bit rate, aggregate throughput, coverage range and ...

Solutions for service deployment in the edge of the network

  • Chantrain D.

Starting from an analysis of current trends in the telecommunications environment and of new service deployment requirements, this paper describes a number of solutions to enable flexible introduction of value added services in the edge of the network. The focus is on newly emerging services in the IP world, such ...

New dispersion compensating fibres for simultaneous compensation of dispersion and dispersion slope of non-zero dispersion shifted fibres in the C or L band

  • Edvold B.
  • Gruner-Nielsen L.
  • Knudsen S.
  • Larsen C.
  • Veng T.

A new dispersion compensating fiber with extremely high negative dispersion slope is reported. Low insertion loss between 1530 and 1610 nm is demonstrated using a new splice technique

Atoms to applets: building systems ICs in the 21st century

  • Pinto M.

Enabled by the seemingly never-ending progress of silicon technology, the scope of the task of developing an IC has been broadening-orders of magnitude beyond that which worried industry leaders in the early sixties. As we enter the new millennium, devices are being fabricated using processes managed at atomic levels while ...

Constrained multicast routing in WDM networks with sparse light splitting

  • Chunming Qiao
  • Wei J.
  • Xijun Zhang

As WDM technology matures and multicast applications become increasingly popular, supporting multicast at the WDM layer becomes an important and yet challenging topic. In this paper, we study constrained multicast routing in WDM networks with sparse light splitting, i.e., where some switches are incapable of splitting light (or copying data ...

Parallel concatenated trellis coded modulation with automatic repeat request for ADSL applications

  • Antoine P.

The paper presents a parallel concatenated trellis coded modulation (PCTCM) scheme for ADSL applications. Automatic repeat request (ARQ) is used to remove the inherent error floor of PCTCM. This makes the system robust against impulse noise even if the delay is significantly lowered with respect to the current ADSL FEC ...

On the downlink capacity of cellular CDMA and TDMA over nondispersive channels

  • Moeneclaey M.
  • Sari H.
  • Steendam H.

We investigate the multiuser interference on the downlink channel (from base station to users) in cellular code-division multiple access (CDMA) and time-division multiple access (TDMA) systems. The results indicate that for the same total bandwidth occupancy and maximum number of users per cell, multiuser interference is approximately 10 dB higher ...

Two-dimensional modeling in TMN: a systems approach

  • Lanman M.
  • Yao Liang

Based on enabling distributed object technology, a two-dimensional modeling approach is presented for TMN. The key insight of this systems approach is to decouple the static binding of computing interfaces from the resource oriented information (data) objects in TMN, and enable us to consolidate computational interfaces in computational objects and ...

Software radio: implementation aspects

  • Truter A.
  • Wolmarans E.

Software radio is not a new technology, but an evolution and convergence of existing digital radio and software technologies. The objective of this paper is to characterize the various implementation considerations with regard to software radio, including an R&D perspective. The different implementation aspects include those on a system level ...

Can real-time extensions survive a Windows NT crash?

  • Caudy N.
  • Mcfearin L.

Windows NT has become a widespread, general purpose operating system and is seeing increased use in real-time applications. However Windows NT was nor designed for real-time operation and, in such environments, the all too common Windows NT system stop event (crash or “Blue Screen of Death”) can prove catastrophic. Consequently ...

Measurement of the maximum speed of PMD fluctuation in installed field fiber

  • Baumert W.
  • Bulow H.
  • Kuppers F.
  • Mohr F.
  • Schmuck H.
  • Schulz T.
  • Weiershausen W.

A polarization-mode dispersion (PMD) transient recorder setup was realized enabling for the first time to our knowledge the monitoring of fast PMD fluctuation with a bandwidth of up to 1 MHz. Thirty-six hours of observation of an installed field fiber exhibits significant PMD variation within 10 ms

Block turbo code performances for long-haul DWDM optical transmission systems

  • Ait Sab O.
  • Lemaire V.

We present the performance of a foward error correction (fec) scheme for submarine transmission systems using Block turbo code. The decoding is based on soft decoding and soft decision. This solution gives 4 dB additional gain margin compared with the existing rs(255,239) with redundancy equal to 28%

A software defined radio architecture with power control for 3G W-CDMA systems

  • Truter A.
  • Wolmarans E.

Software radio (SWR) has past become one of the focal points for research and development in mobile communication systems. The great promise of SWR is the ability to adapt to changing environments. This applies equally to the need for multiple standards compliance as well as the need to adapt to ...

An empirical evaluation of the MC/DC coverage criterion on the HETE-2 satellite software

  • Dupuy A.
  • Leveson N.

In order to be certified by the FAA, airborne software must comply with the DO-178B standard. For the unit testing of safety-critical software, this standard requires the testing process to meet a source code coverage criterion called Modified Condition/Decision Coverage. This part of the standard is controversial in the aviation ...