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  • 1
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    CCD correlation techniques (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Two CCD techniques were discussed for performing an N-point sampled data correlation between an input signal and an electronically programmable reference function. The design and experimental performance of an implementation of the direct time correlator utilizing two analog CCDs and MOS multipliers on a single IC were evaluated. The performance of a CCD implementation of the chirp z transform was described, and the design of a new CCD integrated circuit for performing correlation by multiplication in the frequency domain was presented. This chip provides a discrete Fourier transform (DFT) or inverse DFT, multipliers, and complete support circuitry for the CCD CZT. The two correlation techniques are compared.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: JPL Conf. on Charge-Coupled Device Technol. and Appls.; 6 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Spectral analysis using the CCD Chirp Z-transform (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The charge coupled device (CCD) Chirp Z transformation (CZT) spectral analysis techniques were reviewed and results on state-of-the-art CCD CZT technology are presented. The CZT algorithm was examined and the advantages of CCD implementation are discussed. The sliding CZT which is useful in many spectral analysis applications is described, and the performance limitations of the CZT are studied.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: AGARD Impact of Charge Coupled devices and Surface Acoustic Wave Devices on Signal Process. and Imagery in Advanced Systems; 19 p
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Low power, compact charge coupled device signal processing system (1980)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: A variety of charged coupled devices (CCDs) for performing programmable correlation for preprocessing environmental sensor data preparatory to its transmission to the ground were developed. A total of two separate ICs were developed and a third was evaluated. The first IC was a CCD chirp z transform IC capable of performing a 32 point DFT at frequencies to 1 MHz. All on chip circuitry operated as designed with the exception of the limited dynamic range caused by a fixed pattern noise due to interactions between the digital and analog circuits. The second IC developed was a 64 stage CCD analog/analog correlator for performing time domain correlation. Multiplier errors were found to be less than 1 percent at designed signal levels and less than 0.3 percent at the measured smaller levels. A prototype IC for performing time domain correlation was also evaluated.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA-CR-3215 , REPT-08-78-49
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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