Laser Excess Noise Reduction in Optical Phase Shift Measurements

  • Mitrofanov O.

We describe and demonstrate an optical detection scheme for small electro-optic phase shift measurements. The scheme increases the modulation depth due to the electro-optic effect and allows broadband reduction of laser excess noise in balanced dual-differential detection ssystems. The scheme is applied in electro-optic phase shift measurement setup for integrated ...

A New Approach to Utterance Verification Based on Neighborhood Information in Model Space

  • Jiang H.
  • Lee C.

In this paper, we propose to use neighborhood information in model space to perform utterance verification (UV). At first, we present a nested-neighborhood structure for each underlying model in model space and assume the underlying model's competing models sit in one of these neighborhoods, which is used to model alternative ...

40-Gb/s return-to-zero alternate-mark-inversion (RZ-AMI) transmission over 2000 km

  • Chandrasekhar S.
  • Gnauck A.
  • Leuthold J.
  • Raybon G.
  • Su Y.
  • Winzer P.

We report on the transmission of 40-Gbit/s modified duobinary return-to-zero (RZ-MDB) signals over more than 2000 km (20x100 km) at a bit-error ratio of 10 sup -9. The RZ-MDB signal is generated using a single, non-return-to-zero-driven modulator in combination with an optical delay interferometer.

Capacity Of Multi-Antenna Channels In The Low-Power Regime

  • A.M. Tulino
  • Lozano A.
  • S. Verdu

This paper provides analytical characterizations of the impact on multi-antenna capacity of several important features that fall outside the standard multi-antenna model, namely, (i) antenna correlation, (ii) Ricean factors, (iii) polarization diversity, and (iv) out-of-cell interference, all in the regime of low signal-to-noise ratio. The interplay of rate, bandwidth and ...

Shape Analysis through Predicate Abstraction and Model Checking

  • Dams D.
  • Namjoshi K.

We propose a new framework, based on predicate abstraction and model checking, for shape analysis of programs. Shape analysis is used to statically collect information -- such as possible reachability and sharing -- about program stores. Rather than use a specialized abstract interpretation based on shape graphs, we instantiate a ...

A New Primal Screen

  • Pomerance C.

Quick, is 91 prime or composite? OK, you have that one, but how about 12345678910111213? As with 91, the answer is still relatively easy to find, since this 17-digit number is divisible by the smallish prime 113, and so it is composite. But searching for factors often gets bogged down, ...

Timed Fair Exchange Of Standard Signatures

  • Garay J.
  • Pomerance C.

In this paper we show how to achieve timed fair exchange of digital signatures of arbitrary type.

Comparison of Systems Tolerance to Polarization Mode Dispersion Between Different Modulation Formats

  • Haunstein H.
  • Hunsche S.
  • Moeller L.
  • Xie C.

The polarization mode dispersion (PMD) tolerance of different modulation formats is studied, including on-off-keyed, differential-phase-shift-keyed (DPSK), and carrier-suppressed return-to-zero (CSRZ) formats. It is shown that, generally, for uncompensated systems the modulation formats with larger pulse width have larger penalty, while the modulation formats with smaller bandwidth perform better in PMD ...

Quantum State Discrimination of Coherent States

  • Vanenk S.

I'll discuss linear optics implementations of several quantum state discrimination tasks, applied to coherent states. Both unambiguous state discrimination and quantum hypothesis testing are considered. Applications to quantum cryptography are pointed out.

Mirage: A Tool for Interactive Pattern Recognition from Multimedia Data

  • Ho T.

We describe Mirage, a software tool designed for interactive exploration of the correlation of multiple partitional or hierarchical cluster structures arising in different contexts. The tool shows projected images of point classes and traversals of proximity structures in one, two, or higher dimensional subspaces, in linked views of tables, histograms, ...

Pixel Navigator - A Simple Mobile Internet Paradigm

  • Battaglia F.
  • Ong P.
  • Rana A.

The rise of the World Wide Web and the market growth of mobile devices with advanced data capability make the mobile Internet the inevitable next big wave of technology. Due to the form factor limitation, mobile device will never be used as a Web browsing tool like its desktop counterpart. ...

A 19.2 Mbps 4x4 BLAST/MIMO Detector with Soft ML Outputs (NOT KNOWN IF TALK GIVEN)

  • Davis L.
  • Garrett D.
  • Woodward G.

This paper presents a silicon device that performs ML detection and produces soft outputs approximating the log-likelihood ratios (LLRs) of the a posteriori probabilities (APPs) for each of the transmitted bits. This algorithm is termed ML-APP. The ML search is achieved with a parallel processing architecture that exploits the symmetry ...

16-Channel Digitally Tunable External-Cavity Laser with Nanosecond Switching Time

  • C. Goullancourt
  • J. Honthaas
  • Kauer M.
  • Leuthold J.
  • M. Girault
  • O. Pellegri
  • Zirngibl M.

We present a 16-channel 100 GHz-spacing digitally tunable packet switching transmitter based on a novel external-cavity laser design. The transmitter can switch within 0.8 ns between its channels at 0 dBm output power and <0.7 dB penalty when switched from just above threshold and within 20 ns and 0.5 dB ...

Multi-Channel Shared PMD Compensation in WDM Systems

  • Liu X.
  • Xie C.

We propose a novel polarization-mode dispersion (PMD) compensation scheme for wavelength division multiplexing (WDM) systems, in which many WDM channels share one or a few PMD compensators at receiver site. It is shown, both analytically and numerically, that the performance of this scheme can achieve virtually the same performance as ...

Novel Geometry for an Integrated Channel Selector

  • Bernasconi P.
  • Cabot S.
  • Miller B.
  • Sauer N.
  • Stulz L.
  • Vanthourhout D.
  • Yang W.
  • Zhang L.

A monolithically integrated channel selector with power monitor is proposed in a new reflective configuration. One star coupler, one arrayed waveguide grating, and a minimum number of SOA gates are used to achieve loss free transmission. A 32-channel device controlled by only 12 SOA-gates is realized in InP. Low on-chip ...

Multiuser Detection and Turbo Multiuser Decoding for Asynchronous Multitone Multiple Access Systems

  • Tonello A.

We consider multicarrier multiple access architectures that are based on combining discrete multitone (DMT) or filtered multitone (FMT) modulation with multplexing of tones across users. Communications are asynchronous, e.g., uplink cellular communications. Optimum multiuser detection is formulated for demodulation of multitone signals that experience time and frequency asynchronism and propagate ...

Multiuser Detection/Decoding in Asynchronous Multitone Multiple Access Systems

  • Tonello A.

We formulate the optimum multicarrier multiuser detector to be deployed in asynchronous multitone multiuser systems. These multiple access systems are based on combining discrete multitone (DMT) or filtered multitone (FMT) modulation with multiplexing of tones across distinct users. Communications are asynchronous, e.g., uplink cellular communications: signals belonging to distinct users ...

Multidimensional Declustering Schemes Using Golden Ratio and Kronecker Sequences

  • Bhatia R.
  • C-M. Chen
  • R.K. Sinha

We propose a new data declustering scheme, GRS, for range queries on uniform data. Our scheme is based on Golden Ratio Sequences for two dimensions and Kronecker Sequences for higher dinensions. Using exhaustive simulation we show that, in two dimensions, the worst case (additive) deviation of GRS from the optimal ...

Forward and Reverse Link Capacity for 1xEV-DO: Third Generation Wireless High-Speed Data Systems

  • Bi Q.
  • Brown R.
  • Cui D.
  • Gandhi A.
  • Huang C.

This paper presents the performance results of a 1xEV-DO system. With different fading channels, data rate control lengths and overhead channel power levels, the system performance will vary. While optimizing the forward-link throughput becomes critical for asymmetric traffic demand, it is important to ensure that the reverse-link throughput is sufficient ...

Throughput and Energy Efficiency in Topology-Controlled Multi-Hop Wireless Sensor Networks

  • Li L.
  • Sinha P.

In this paper, we examine the effect of topology control on network capacity and energy efficiency. As compared to fixed transmission power, our analysis shows that the capacity improvements depend on the reliability of link layer transmissions and traffic patterns. Specifically, if link layer does not retransmit, network capacity decreases ...