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  • 1
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    Finite wordlength implementation of a megachannel digital spectrum analyzer (1986)
    In:  CASI
    Details
    Publication Date: 2006-02-14
    Description: The results of an extensive system analysis of the megachannel spectrum analyzer currently being developed for use in various applications of the Deep Space Network are presented. The intent of this analysis is to quantify the effects of digital quantization errors on system performance. The results of this analysis provide useful guidelines for choosing various system design parameters to enhance system performance.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: The Telecommunications and Data Acquisition Report (date]; p 244 - 254
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Status of the NASA SETI Sky Survey microwave observing project (1992)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The Sky Survey observing program is one of two complementary strategies that NASA plans to use in its microwave Search for Extraterrestrial Intelligence (SETI). The primary objective of the Sky Survey is to search the entire sky over the frequency range 1000-10,000 MHz for evidence of narrow band signals of extraterrestrial, intelligent origin. Spectrum analyzers with upwards of 10 million channels and data rates in excess of 10 gigabits per second are required to complete the survey in less than 7 years. To lay the foundation for the operational SETI Sky Survey, a prototype system has been built to test and refine real time signal detection algorithms, to test scan strategies and observatory control functions, and to test algorithms designed to reject radio frequency interference. This paper presents a high level description of the prototype hardware and reports on the preparations to deploy the system to the 34-m antenna at the research and development station of NASA's Deep Space Communication Complex, Goldstone, California.
    Keywords: SPACE SCIENCES (GENERAL)
    Type: Acta Astronautica (ISSN 0094-5765); 26; 3-4,
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    JPL 2-to-the-20th-power channel 300 MHz bandwidth digital spectrum analyzer (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: A million (two to the 20th power) channel, 300 MHz bandwidth, digital spectrum analyzer was considered. The design, fabrication, and maintenance philosophy of the modular, pipelined, fast fourier transform (FFT) hardware are described. The spectrum analyzer will be used to examine the region from 1.4 GHz to 26 GHz for radio frequency interference which may be harmful to present and future tracking missions of the Deep Space Network. The design has application to the search for extraterrestrial intelligence signals and radio science phenomena.
    Keywords: COMMUNICATIONS AND RADAR
    Type: The Deep Space Network; p 57-61
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A wide-band, high-resolution spectrum analyzer (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A million-channel, 20 MHz-bandwidth, digital spectrum analyzer under evelopment for use in the SETI Sky Survey and other applications in the Deep Space Network is described. The analyzer digitizes an analog input, performs a 2(20)-point Radix-2, Fast Fourier Transform, accumulates the output power, and normalizes the output to remove frequency-dependent gain. The effective speed of the real-time hardware is 2.2 GigaFLOPS.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: The Telecommunications and Data Acquisition Report; p 180-190
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    SETI prototype system for NASA's Sky Survey microwave observing project - A progress report (1990)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Two complementary search strategies, a Targeted Search and a Sky Survey, are part of NASA's SETI microwave observing project scheduled to begin in October of 1992. The current progress in the development of hardware and software elements of the JPL Sky Survey data processing system are presented. While the Targeted Search stresses sensitivity allowing the detection of either continuous or pulsed signals over the 1-3 GHz frequency range, the Sky Survey gives up sensitivity to survey the 99 percent of the sky that is not covered by the Targeted Search. The Sky Survey spans a larger frequency range from 1-10 GHz. The two searches will deploy special-purpose digital signal processing equipment designed and built to automate the observing and data processing activities. A two-million channel digital wideband spectrum analyzer and a signal processor system will serve as a prototype for the SETI Sky Survey processor. The design will permit future expansion to meet the SETI requirement that the processor concurrently search for left and right circularly polarized signals.
    Keywords: SPACE BIOLOGY
    Type: IAF PAPER 90-576
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    A wideband, high-resolution spectrum analyzer (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A two-million-channel, 40 MHz bandwidth, digital spectrum analyzer under development at the Jet Propulsion Laboratory is described. The analyzer system will serve as a prototype processor for the sky survey portion of NASA's Search for Extraterrestrial Intelligence program and for other applications in the Deep Space Network. The analyzer digitizes an analog input, performs a 2 (sup 21) point Discrete Fourier Transform, accumulates the output power, normalizes the output to remove frequency-dependent gain, and automates simple signal detection algorithms. Due to its built-in frequency-domain processing functions and configuration flexibility, the analyzer is a very powerful tool for real-time signal analysis.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: JPL, The Telecommunications and Data Acquisition Report; p 188-198
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Wideband digital spectrum analyzer (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Modular spectrum analyzer consisting of RF receiver, fast fourier transform spectrum analyzer, and data processor samples stochastic signals in 220 channels. Construction reduces design and fabrication costs of assembled unit.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-14394 , NASA Tech Briefs (ISSN 0145-319X); 3; 4; P. 494
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Subcarrier signal combiner for arrayed antennas (1977)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Quadrature correlation for automatic signal phasing and variable delay is used to combine signals for improved signal-to-noise ratio.
    Keywords: ELECTRONIC SYSTEMS
    Type: NPO-13723 , NASA Tech Briefs (ISSN 0145-319X); 1; 3; P. 353
    Format: text
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    NASA TECHNICAL REPORTS
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