SPIE

Displaying 1-8 of 8 results

  • White Papers // Oct 2010

    Distributed Data Mining in the National Virtual Observatory

    The astronomy research community is about to become the beneficiary of huge multi−terabyte databases from a host of sky surveys. The rich and diverse information content within this "Virtual sky" and the array of results to be derived therefrom will far exceed the current capacity of data search and research...

    Provided By SPIE

  • White Papers // Oct 2010

    A PSAM-Based Estimator of Noise and Fading Statistics for Optimum Receivers of Free Space Optics Signals

    Incoherent receivers of Free Space Optical (FSO) signals have no knowledge of instantaneous channel state. Thus, the receiver requires some information about the noise and fading statistics for a Maximum Likelihood (ML)-based optimal detection. Using pilot-aided symbols, the authors develop a simple Multi Slot Averaging (MSA) estimation technique to approximate...

    Provided By SPIE

  • White Papers // Jun 2010

    Passive Optical Network Based on Optical-Code-Division Multiple Access

    Since the Internet and broadband networks were introduced, emerging applications - such as video on demand, teleconferencing, and high-quality audio transmission - have demanded high-throughput optical-access networks with stringent Quality-of-Service (QoS) capabilities. However, the infrastructure of current access networks suffers from limited bandwidth, high network-management costs, poor flexibility, and low...

    Provided By SPIE

  • White Papers // May 2010

    Application of the JDL Data Fusion Process Model for Cyber Security

    A number of cyber security technologies have proposed the use of data fusion to enhance the defensive capabilities of the network and aid in the development of situational awareness for the security analyst. While there have been advances in fusion technologies and the application of fusion in Intrusion Detection Systems...

    Provided By SPIE

  • White Papers // May 2010

    Cloud Computing in the Age of Data-Intensive Science

    The authors described how science is becoming 'Datacentric,' in the sense that vast quantities of public data are used to create new products. What is the cheapest and most efficient way of producing them? Should the data be uploaded to the software, or should software be built near the data?...

    Provided By SPIE

  • White Papers // Sep 2009

    Securing an Optical Network by Quantum Noise

    Single-photon quantum communication exploits special properties of photon states to securely transfer information from place to place. An inherent drawback of this system, however, is that it is very sensitive to the so-called energy-loss effect during transit. Consequently, exchanging cryptographic keys, whether by fiber or satellite, is not fast enough...

    Provided By SPIE

  • White Papers // Jul 2009

    Virtual Single-Mode Connector Enables Free-Space Optical Communications

    Free-Space Optical (FSO) communications can provide flexible, easy-to-install, and license-free line-of-sight wireless communications links. The high speed and large bandwidth offered by light-wave communication technology make them very attractive as means to meet future demand for broadband Internet access and high-definition television broadcasting services. However, the bit rate of existing...

    Provided By SPIE

  • White Papers // Apr 2009

    Subsea Ultraviolet Solar-Blind Broadband Free-Space Optics Communication

    This paper examines the potential of subsea free-space optics FSO for sensor network applications leveraging the emerging technologies of highly sensitive photon-counting detectors and semi-conductor LED and laser light sources in the UV solar blind. Monitoring oil and gas production installations is the niche application discussed. The merits of FSO...

    Provided By SPIE

  • White Papers // Apr 2009

    Subsea Ultraviolet Solar-Blind Broadband Free-Space Optics Communication

    This paper examines the potential of subsea free-space optics FSO for sensor network applications leveraging the emerging technologies of highly sensitive photon-counting detectors and semi-conductor LED and laser light sources in the UV solar blind. Monitoring oil and gas production installations is the niche application discussed. The merits of FSO...

    Provided By SPIE

  • White Papers // May 2010

    Application of the JDL Data Fusion Process Model for Cyber Security

    A number of cyber security technologies have proposed the use of data fusion to enhance the defensive capabilities of the network and aid in the development of situational awareness for the security analyst. While there have been advances in fusion technologies and the application of fusion in Intrusion Detection Systems...

    Provided By SPIE

  • White Papers // Sep 2009

    Securing an Optical Network by Quantum Noise

    Single-photon quantum communication exploits special properties of photon states to securely transfer information from place to place. An inherent drawback of this system, however, is that it is very sensitive to the so-called energy-loss effect during transit. Consequently, exchanging cryptographic keys, whether by fiber or satellite, is not fast enough...

    Provided By SPIE

  • White Papers // Jul 2009

    Virtual Single-Mode Connector Enables Free-Space Optical Communications

    Free-Space Optical (FSO) communications can provide flexible, easy-to-install, and license-free line-of-sight wireless communications links. The high speed and large bandwidth offered by light-wave communication technology make them very attractive as means to meet future demand for broadband Internet access and high-definition television broadcasting services. However, the bit rate of existing...

    Provided By SPIE

  • White Papers // Jun 2010

    Passive Optical Network Based on Optical-Code-Division Multiple Access

    Since the Internet and broadband networks were introduced, emerging applications - such as video on demand, teleconferencing, and high-quality audio transmission - have demanded high-throughput optical-access networks with stringent Quality-of-Service (QoS) capabilities. However, the infrastructure of current access networks suffers from limited bandwidth, high network-management costs, poor flexibility, and low...

    Provided By SPIE

  • White Papers // May 2010

    Cloud Computing in the Age of Data-Intensive Science

    The authors described how science is becoming 'Datacentric,' in the sense that vast quantities of public data are used to create new products. What is the cheapest and most efficient way of producing them? Should the data be uploaded to the software, or should software be built near the data?...

    Provided By SPIE

  • White Papers // Oct 2010

    Distributed Data Mining in the National Virtual Observatory

    The astronomy research community is about to become the beneficiary of huge multi−terabyte databases from a host of sky surveys. The rich and diverse information content within this "Virtual sky" and the array of results to be derived therefrom will far exceed the current capacity of data search and research...

    Provided By SPIE

  • White Papers // Oct 2010

    A PSAM-Based Estimator of Noise and Fading Statistics for Optimum Receivers of Free Space Optics Signals

    Incoherent receivers of Free Space Optical (FSO) signals have no knowledge of instantaneous channel state. Thus, the receiver requires some information about the noise and fading statistics for a Maximum Likelihood (ML)-based optimal detection. Using pilot-aided symbols, the authors develop a simple Multi Slot Averaging (MSA) estimation technique to approximate...

    Provided By SPIE