ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    facet.materialart.
    Unknown
    Improved Noise-Power Estimators Based On Order Statistics (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Technique based on order statistics enables design of improved noise-power estimators. In original intended application, noise-power estimators part of microwave-signal-processing system of Search for Extraterrestrial Intelligence project. Involves limiting dynamic range of value to be estimated; making it possible to achieve performance of order-statistical estimator with simple algorithms and equipment and with only one pass over input data. Technique also applicable to other signal-detection systems and to image-detection systems required to exhibit constant false-alarm rates.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-19213 , NASA Tech Briefs (ISSN 0145-319X); 19; 2; P. 42
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unknown
    Real-Time, Polyphase-FFT, 640-MHz Spectrum Analyzer (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Real-time polyphase-fast-Fourier-transform, polyphase-FFT, spectrum analyzer designed to aid in detection of multigigahertz radio signals in two 320-MHz-wide polarization channels. Spectrum analyzer divides total spectrum of 640 MHz into 33,554,432 frequency channels of about 20 Hz each. Size and cost of polyphase-coefficient memory substantially reduced and much of processing loss of windowed FFTs eliminated.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-18776 , NASA Tech Briefs (ISSN 0145-319X); 18; 10; P. 64
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unknown
    Test Bed For Telerobots (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Assembly of electromechanical and electronic equipment (including computers) constitutes test bed for development of advanced robotic systems for remote manipulation. Combines features not found in commercial systems. Its architecture allows easy growth in complexity and level of automation. System national resource for validation of new telerobotic technology. Intended primarily for robots used in outer space, test bed adapted to development of advanced terrestrial telerobotic systems for handling radioactive materials, dangerous chemicals, and explosives.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-17898 , NASA Tech Briefs (ISSN 0145-319X); 14; 11; P. 46
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unknown
    Large-Constraint-Length, Fast Viterbi Decoder (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Scheme for efficient interconnection makes VLSI design feasible. Concept for fast Viterbi decoder provides for processing of convolutional codes of constraint length K up to 15 and rates of 1/2 to 1/6. Fully parallel (but bit-serial) architecture developed for decoder of K = 7 implemented in single dedicated VLSI circuit chip. Contains six major functional blocks. VLSI circuits perform branch metric computations, add-compare-select operations, and then store decisions in traceback memory. Traceback processor reads appropriate memory locations and puts out decoded bits. Used as building block for decoders of larger K.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-17639 , NASA Tech Briefs (ISSN 0145-319X); 14; 4; P. 34
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
  • 5
    facet.materialart.
    Unknown
    Reducing Spurious Output Of NCO's (1994)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Spurious frequency components in output of numerically controlled oscillator (NCO) reduced by dithering appropriate digital signals with small random noise signal prior to truncation. Enables reduction of word length without increasing spurious signal power.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-18789 , NASA Tech Briefs (ISSN 0145-319X); 18; 6; P. 48
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...