Large Deviations with Diminishing Rates

  • A. Schwartz
  • Weiss A.

The theory of large deviations for jump Markov processes has been generally proved only when jump rates are bounded below, away from zero [2,5,7]. Yet various applications of interest do not satisfy this condition. We describe several classes of models where jump rates diminish to zero in a Lipschitz continuous ...

16-Channel Digitally Tunable Packet Switching Transmitter with Sub-Nanosecond Switching Time

  • Kauer M.
  • M. Girault
  • Zirngibl M.

We present a 16-channel 100 GHz-spacing digitally tunable packet switching transmitter based on an external-cavity laser. The transmitter can switch within 0.8 ns between its channels at 0 dBm output power and <0.7 dB penalty.

Calculation of Soft Handoff Gain for UMTS

  • Al-Housami H.
  • Casado-Fernandez M.

Defining "soft handoff gain" is not as trivial as one might think. One reason is because the soft handoff in the uplink direction is different from that in the downlink direction. Another reason is the vague context of this gain. Is it the gain compared to a system lacking the ...

Application of Load Control in 3G CDMA Networks for Improved System Level Modelling and Performance Analysis

  • Bernhard U.
  • Mueckenheim J.
  • Pampel H.

In this paper we developed a system level model of a CDMA network based on the power control ability of the system. From the load control problem formulation a measure of the system performance in terms of the system outage probability was derived, which is based on the system load ...

Micro-Cell Planning within Macro-Cells in UMTS: Downlink Analysis

  • Jami I.
  • Tao H.

This paper addresses the issue of micro-cells planning within macro-cell using a single UMTS carrier. Analyses have been made on coverage and capacity issues for 64Kbps circuit switched service through system level simulations. In this paper we attempt to cover some basic issues related to micro-cell planning and design considerations ...

A Pulse Method for Measuring the Minimum Shielding Effectiveness of Enclosures

  • Kudyan H.

This paper reports a pulse technique for measuring the Shielding Effectiveness (SE) of enclosures, without the use of an anechoic chamber or an open area test site (OATS). Experimental results are presented and compared to those of the conventional frequency domain method using an anechoic chamber. The pulse method is ...

Intelligent Antenna System for cdma2000

  • Benning R.
  • Buehrer R.
  • Soni R.

We will focus in this article on possibilities for the cdma2000 third-generation system that do not require standards changes. We will highlight the performance enhancements that can be obtained on both the reverse link and the forward link through use of an antenna array architecture that is optimized for the ...

Comparison of Declarative and Interrogative Intonation in Chinese

  • J. Yuan
  • Kochanski G.
  • Shih C.

We model the differences between declarative and interrogative intonation in Chinese with Stem-ML, an intonation description language combined with an algorithm for translating tags into quantitative prosody. Out study shows that the diverse surface patterns can be accounted for by two consistent gestures: (1) Interrogative intonation has a higher phrase ...

Modeling Tones in Continuous Cantonese Speech

  • Kochanski G.
  • Shih C.
  • T. Lee
  • Y. Li

Cantonese is a major Chinese dialect with a complicated tone system. This research focuses on quantitative modeling of Cantonese tones. It uses Stem-ML, a language-independent framework for quantitative intonation modeling and generation. A set of Fsub0 prediction models are built, and trained on acoustic data. The prediction error is about ...

Sea of Images

  • Aliaga D.
  • Carlbom I.
  • D. Yanovsky
  • Funkhouser T.

In this paper, we present a "Sea of Images," a practical approach to dense sampling, storage, and reconstruction of the plenoptic function in large, complex indoor environments. We use a motorized cart to capture omnidirectional images every few inches on an eye-height plane throughout an environment. The captured images are ...

Operation Kinetics of a DNA-Based Molecular Switch

  • F.C. Simmel
  • R.J. Sanyai
  • Yurke B.

The influence of temperature variation, salt concentration and pH value on the operation kinetics of a simple DNA-based molecular switch is investigated. The device shows robust behavior over a wide range of temperatures, pH values and salt concentrations. In particular, the device operates well under physiological conditions. The experimental data ...

Generation of Low-Frequency Components Due to Phase-Amplitude Modulation of Subcycle Far-Infrared Pulses in Near-Field Diffraction

  • Mitrofanov O.
  • Pfeiffer L.
  • West K.

We observe carrier phase dependent generation of low-frequency spectral components in the near-field zone of a subwavelength aperture illuminated by subcycle far-infrared (terahertz) pulses. Diffraction induced pi/2-phase shift of the pulse carrier results in the spectral intensity variation of the low-frequency components. The effect demonstrates that spectral content of subcycle ...

Variation of Spectral Content of Subcycle Far-Infrared Pulses Due to Phase-Amplitude Modulation in Near-Field Diffraction

  • Mitrofanov O.
  • Pfeiffer L.
  • West K.

Spectral content of subcycle electromagnetic pulses is not conserved under phase shift of the carrier oscillations with respect to the pulse enevelope. We observe carrier phase dependent large variation of the low frequency content of subcycle far-infrared (terahertz) pulses in the near-field zone of a subwavelength aperture.

Wavelength Selective 1x4 Switch for 128 WDM Channels at 50 GHz Spacing

  • Basavanhally N.
  • Bolle C.
  • Buhl L.
  • C.S. Pai
  • Chandrasekhar S.
  • E. Ferry
  • F.P. Klemens
  • G.R. Bogart
  • Giles R.
  • Greywall D.
  • H.T. Soh
  • J.E. Bower
  • J.F. Miner
  • K. Teffeau
  • K. Werder
  • Kolodner P.
  • Low Y.
  • Marom D.
  • Neilson D.
  • Pardo F.
  • R.C. Keller
  • S-H. Oh
  • S. Rogers
  • W. Mansfield

We present a reconfigurable wavelength-selective switch that independently distributes 128 input WDM channels to four output ports. The switch is based on bulk optics and MEMS micro-mirrors, exhibits <5 dB insertion loss and flat-top pass-bands, and is well suited for transparent switching of 10 Gb/s signals.

2.5 Tb/s (64x42.7 Gb/s) Transmission Over 40x100 km NZDSF Using RZ-DPSK Format and All-Raman-Amplified Spans

  • Agarwal A.
  • Banerjee S.
  • Chandrasekhar S.
  • Doerr C.
  • Gill D.
  • Gnauck A.
  • Grosz D.
  • Hunsche S.
  • Kung A.
  • Leuthold J.
  • Liu X.
  • Marhelyuk A.
  • Maywar D.
  • Movassaghi M.
  • Raybon G.
  • Stulz L.
  • Wei X.
  • Xu C.

We report 2.5 Tb/s (64x42.7-Gb/s) WDM transmission over 4000 km (forty 100-km spans) of non-zero dispersion-shifted fiber. This capacity x distance record of 10 petabit-km/s for 40-Gb/s systems is achieved using return-to-zero differential-phase-shift-keyed modulation, balanced detection, forward error correction, and distributed Raman amplification.

Ultra-Sensitive Optical Sampling by Coherent-Linear Detection

  • Dorrer C.
  • Kilper D.
  • Raybon G.
  • Stuart H.

Optical sampling is achieved using an all-optical linear technique with a record sensitivity of 10sup-3 mWsup2, 1000 times better than nonlinear techniques. Phase sensitivity is removed by simultaneous measurement of orthogonal phase quadratures.

Amplitude Sensitivity Limits of Optical Sampling for Optical Performance Monitoring

  • Dinu M.
  • F. Quochi

Limits to the sensitivity of optical sampling methods for optical performance monitoring are derived, accounting for both the fundamental detection limit and for realistic detector and thermal noise sources during detection. Nonlinear and linear (homodyne) sampling are compared against optoelectronic monitoring techniques.

Partial Quantum Statistics and Its Implications for Narrow Band Materials

  • Zhou T.

Based upon the newly proposed partial quantum statistcs [T.Zhou, Solid State Commun. 115, 185 (2000)], some canonical physical properties of partially localized electron systems have been calculated. The calculated transport and superconducting properties of such systems are very different from those of Landau-Fermi liquids, but display some striking similarities to ...

Single-Mode Tunable Quantum Cascade Distributed Feedback and Multiple-Wavelength Quantum Cascade Lasers

  • Capasso F.
  • Colombelli R.
  • Gmachl C.
  • Sivco D.

Single mode and tunable Quantum Cascade Distributed Feedback (QC-DFB) lasers in the wavelength range from 4.5 to 16.5 mum are reviewed.

Er-Doped GaN Grown by Molecular Beam Epitaxy

  • Ng H.

GaN films doped with Er were grown on (0001) sapphire substrates by radio-frequency plasma-assisted molecular molecular beam epitaxy (MBE). The incorporation of Er into the GaN films was achieved in-situ by the use of an effusion cell. The incorporation of Er was found to be in the range of 6x10sup17 ...